Adaptation of reconstruction window in computed tomography with gated electrocardiogram

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine and medical equipment, namely, to systems of image obtaining, in particular, to computed tomography. In first version of implementation system of image obtaining contains component of window management, which receives ECG signal, which contains premature cardiac cycle and preliminarily obtained X-ray projection data of beating heart. ECGF signal is synchronised with the time of preliminarily obtained X-ray projection data of beating heart. Component of window management places first reconstruction window within the limits of the first cardiac cycle to correspond desirable cardiac phase of preliminarily obtained X-ray projection data, when premature cardiac cycle ensures correspondence of the first reconstruction window to another cardiac phase. Such system contains device of reconstruction which reconstructs projection data, corresponding to multitude of windows of reconstruction of different cardiac cycles to create image data, characteristic of desirable heart phase. In second version of implementation system contains component of window management which deletes first reconstruction window corresponding to suboptimal cardiac phase of preliminarily obtained X-ray projection data of beating heart resulting from abnormal signal in ECG signal. ECG signal is presented in time with preliminarily obtained X-ray projection data of beating heart on multitude of heart cycles, and component of window management adds replacing reconstruction window to optimise set of data for reconstruction, basing on abnormal signal and available preliminarily obtained projection. System also contains reconstruction device which reconstructs set of data for reconstruction in order to create image data characteristic of desirable phase of heart beating. In third version of implementation system contains recommendation component which recommends reconstruction window for cardiac phase within the multitude of preliminarily obtained successive cardiac cycles based on ECG signal and arrhythmia in it, and device of reconstruction, which reconstruct data corresponding to data for each cycle, corresponding to reconstruction window. ECG signal is obtained with simultaneous scanning of beating heart by of computed tomographic scanner. In fourth version of implementation system contains component of window management which automatically changes location or moves first window of reconstruction for cardiac cycle on the basis of premature cardiac cycle within ECG, which is signal synchronised with preliminarily obtained X-ray projection data of beating heart; recommendation component which automatically recommends, at least, one additional reconstruction window, on the basis of premature cardiac cycle; and reconstruction device which reconstructs data, corresponding to reconstruction windows. In order to obtain image received is ECG signal which contains premature cardiac cycle, ECG signal is synchronised in time with preliminarily obtained X-ray projection data of beating heart by multitude of cycles of heart beating. After that, first reconstruction window is moved within the limits of first cardiac cycle, which corresponds to data, different from desirable cardiac phase as a result of premature cardiac cycle. Each from multitude of cardiac cycles contains reconstruction window. Then preliminarily obtained projection data, corresponding to multitude of reconstruction windows, are reconstructed to create image data, characteristic of desirable phase of heart beating. Group of inventions also contains computer-readable data carrier, which stores commands, which, when performed by computer, make computer perform claimed method of image obtaining.

EFFECT: application of claimed group of inventions will make it possible to increase quality of resulting data of reconstructed image.

34 cl, 10 dwg

 

The present application generally relates to systems used to obtain images. In particular, it relates to computed tomography (CT) and, more specifically, to creating and radiation detection and data processing characteristic of him.

Obtaining images using computed tomography (CT) often contains a scan of a moving object. For example, an image obtained using cardiac CT contains a scan of a beating heart. Using cardiac CT is often desirable to reconstruct the data corresponding to the phase of the cardiac cycle in which the heart is relatively motionless. For positioning projection data corresponding to a phase inside the projection data representing the cardiac cycle(s)used different methods containing the Gating signal of the electrocardiogram (ECG).

Using retrospective Gating electrical activity of the heart that reflects the state of the heart throughout the cardiac cycle, is read by the apparatus during scanning of the beating heart. Data corresponding to the desired phase of the cardiac cycle, in this case strabismus (selected) and reconstructed based on the signal representing electrical activity. Data is selected so as to obtain projection data collected is about the whole range of angles, which provides a complete set of CT data.

In one example, the procedure cardiac scan detects projection data set of consecutive cardiac cycles. Then for the reconstruction of each cardiac cycle is selected subset of the data corresponding to the desired phase. Reconstruction of data from multiple cardiac cycles can improve the resolution time. However, irregular heart rhythm, which is usually unpredictable, may modify one or more cardiac cycles relative to the average cardiac cycle. This can lead to the selection data corresponding to a different cardiac phase. As a result, the data of the reconstructed image may deteriorate. One attempt to improve the quality of these data were discussed in the work Cademartiri F. et al.,Improving diagnostic accuracy of MDCT coronary angiography in patients with mild heart rhythm irregularities using ECG editing, AJR Am J Roentgenol. 2006 Mar; 186(3):634-8. Cademartiri F. and others describe a manual method in which the user removes the window, identifying information for the reconstruction of the cardiac cycle when the heart cycle is accompanied by a premature heart cycle, and if this leads to a lack of data for the reconstruction, adds such window(s) to the premature heart cycle. Unfortunately, the quality of the resulting image data based on the ima is working in the availability of data could be worse desired.

Aspects of the present application is directed to the above-mentioned and other problems.

In accordance with one aspect, the system includes a computerized tomography system containing the component control Windows, which receives the ECG signal containing a premature heart cycle. The ECG signal is synchronized with the x-ray projection data of the beating heart. Component windowing the first window reconstruction within the first cardiac cycle to correspond to the desired cardiac phase, when a premature heart cycle causes the first window reconstruction to match another cardiac phase. The reconstruction device reconstructs the projection data corresponding to the set UPS reconstruction from different cardiac cycles, to create image data, characteristic of the desired phase of the heart.

In accordance with another aspect, the system contains a component windowing, which removes the first window reconstruction, which corresponds to a sub-optimal cardiac phase due to the abnormal signal in the ECG signal. The ECG signal is matched in time with the x-ray projection data of a beating heart over many cardiac cycles. Management component adds Windows replacement window recon is e.g., to optimize the data set for the reconstruction based on the abnormal signal and the available projection data. The reconstruction device reconstructs the data set for reconstruction, to create image data, characteristic of the desired phase of the heart beat.

In accordance with another aspect, the system contains a recommendation component that recommends the window reconstruction for cardiac phase within multiple sequential cardiac cycles based on the ECG signal and arrhythmias in it. The ECG signal is obtained by scanning a beating heart, simultaneously with scanning of the beating heart computed tomography (CT) scanner. The reconstruction device reconstructs the data corresponding to the data for each cycle corresponding to the window reconstruction.

In accordance with another aspect, the system comprises a management component of Windows, which automatically changes position or remove the first window reconstruction for cardiac cycle, based on a premature heart cycle within the ECG, which is a signal synchronized with the x-ray projection data of the beating heart. Recommendation component automatically recommends at least one additional window reconstruction based on premature heart is nom cycle. The reconstruction device reconstructs the data corresponding reconstruction Windows.

In accordance with another aspect, a method includes receiving ECG signal containing a premature heart cycle in which the ECG signal is synchronized with the x-ray projection data of a beating heart over many cardiac cycles, changing the position of the first window reconstruction within the first cardiac cycle, which corresponds to the data other than data for the desired cardiac phase of a premature heart cycle in which each of the multiple cardiac cycles contains the reconstruction, and reconstructs the projection data corresponding to the many Windows of reconstruction, to create image data, characteristic of the desired cardiac phase.

According to another aspect, a machine-readable storage medium contains commands that, when executed by a computer, cause the computer to perform a method of ECG signal, including premature heart cycle, changes the position of the first window reconstruction within the first cardiac cycle, which corresponds to the data other than the desired cardiac phase of a premature heart cycle, and reconstructs the projection data corresponding to the many Windows of the reconstruction for the create image data, characteristic for the desired cardiac phase.

Other additional aspects of the present invention will be appreciated by specialists in the art after reading and understanding the following detailed description.

The invention may take form in various components and sets of components and stages and sets of stages. The drawings are given only to illustrate preferred embodiments and should not be construed as limiting the invention.

Figure 1 - example of a system for obtaining image.

Figure 2 - representative of the ECG signal.

Figure 3 - representative signal ECG with abnormal cardiac cycle.

Figa, 4b, 4c, 4d, 4e, 5a, 5b, 5c, 5d and 5e are examples in which the system uses the ECG signal with abnormal cardiac cycle, to select data for reconstruction.

6 is an example in which it is recommended that another phase for reconstruction.

Fig.7 is an example of the method.

Fig, 9 and 10 is a graphical explanation of the example method.

With reference to figure 1, computed tomography (CT) scanner 100 includes a rotating gantry portion 104, which rotates around the longitudinal axis z. Part 104 has a source 108 of x-ray radiation, such as x-ray tube and x-ray detector 112 that generates x-ray projection data for a variety of projection is Glov or species related to the study area 116. The detector 112 typically contains a two-dimensional matrix of detector elements, which creates the output signals or projection data characteristic of the detected radiation. The projection data is stored in the storage device 120 or other storage device.

Bearing 124 for an object, such as a couch, supports the patient or other object in the study area 116. Bearing 124 of the object can move to direct the movement of the patient or other object within the study area 116 before, during and after scanning.

Biological monitor 128, such as electrocardiographic (ECG) or respiratory monitor provides information about the cardiac phase or another state of motion of the object. The biological signal monitor 128, in the case of retrospective Gating is used to correlate the projection data with the phase of the movement or the state in which it was received.

Component 132 of the processing associated with the biological monitor 128 and facilitates the choice of data set for the reconstruction from the projection data based on the biological signal. Component 132 processing includes analyzing component 136, the component 140 windowing and recommendation component 144. These components, individually or as a combination, making it easier to nab the RA data for reconstruction, when the biological signal contains anomalous signal. In one example, the data set represents an optimal use of available data in the presence of abnormal signal.

In the case of cardiac CT one example of such anomalous signal is arrhythmia or irregular rhythm, such as premature heart beat or beats. In this case, the analyzing component 136 facilitates the definition, does and how premature heart beat on the window reconstruction. If a premature heart cycle affects the window reconstruction component 140 windowing facilitates the correction, deletion or addition of one or more Windows of the reconstruction, based on a premature heart cycle. Recommendation component 144 recommends the window reconstruction and cardiac phase, based on a premature heart cycle and the data available. These components are described below in more detail.

Device 148 reconstruction reconstructs the selected projection data to generate image data. In the case retrospectively stramilano reconstruction projection data corresponding to one or more desired States or phases of movement of the object or the region of interest are reconstructed to generate image data corresponding to the desired ka is dialno phase(s).

Universal computer acts as a remote control 152 operator. The panel 152 includes an output device that is perceived by a person, such as a monitor or display, and input device type keyboard and mouse. The software is constantly present on the remote control allows the operator to control and interact with the scanner 100. In one example, the interaction contains a representation of a biological signal to the operator, for example, by overlaying the window reconstruction, identifying cardiac phase, the biological signal. In addition, the interaction includes allowing the operator to recognize the anomaly within the biological signal, to create a window reconstruction for cardiac cycle, to select or confirm the data set for reconstruction, to enable automatic data selection and reconstruction and other ways to interact with the scanner 100, such as through a graphical user interface (GUI).

In the following examples, the system 100 is used to apply a retrospective strobing cardiac CT. In this application, the biological monitor 128 provides the ECG signal, synchronized with the projection data corresponding to multiple heart beats.

Figure 2 shows a representative signal 200 baseline ECG, which is "normal" when Isle, what it does not contain a beats, such as when an arrhythmia or irregular heartbeat. Each of the cardiac cycles 204, 208, 212 and 216 contains a systolic period 220, in which the Atria (P wave) and then the ventricles (QRS complex) is compressed, and the ventricles then re-polarizing (prong T), and subsequent diastolic period 224, in which the heart relaxes after contraction and filled again with blood. The distance 228 between cardiac cycles or intervals R-R is represented by the time period t. For the purposes of explanation in this example, t is equal to approximately one (1) second and systolic and diastolic periods - each is about half of the cardiac cycle. Assuming that the signal 200 basic ECG recorded by the monitor 128, when the signal 200 ECG is taken by the panel 152, 152 remote operator displays the signal 200 ECG and provides a mechanism to select the desired cardiac phase for the reconstruction or otherwise enter information characteristic of the desired cardiac phase. In one example, the information input causes the creation of open reconstruction for different parts of the signal 200 ECG, each of which corresponds to the desired cardiac phase.

For example, the operator may provide input information, which leads to the creation of open reconstruction for calm or relatively Aphodiinae cardiac phase of the diastolic period. One such phase usually occurs in the area from mid to late diastole. In one example of this phase should be approximately seventy (70) percent of the duration of the cardiac cycle between the peaks of the teeth of R. Example box 236 reconstruction for this phase is shown in figure 2.

Another phase in which the heart is relatively motionless, occurs approximately at the end of systole. This phase is approximately forty (40) percent of the cycle time. An example of the window 232 reconstruction for this phase are also shown in figure 2. It also discusses other ways to approximate the location of the cardiac phase within signal 200 ECG, such as, in particular, those based on temporal approach. In addition, the operator may additionally or alternatively choose a different cardiac phase.

In General, the width of the window reconstruction is performed with the possibility that data collected over many turns, provided a complete set of data (or at least one hundred eighty (180) degree plus beam angle data) for reconstruction. Because ECG 200 is synchronized with the projection data, the window reconstruction identifies the projection data that correspond to the desired cardiac phase.

In this example, the system is configured to ensure that the data collected during the adjacent cardiac cycles, overlap in the z axis direction or in the longitudinal direction. Data collection with overlapping customize difference in the duration of cardiac cycles between adjacent cardiac cycles and softens the impact of data gaps or when there is no data between the Windows of the reconstruction corresponding to the adjacent heart cycles. System parameters, such as step movement of the table, are selected properly based on the average heart rate of the patient, the number and width of the detectors and speed to ensure an appropriate rate table for collection of overlapping data.

Figure 3 shows the signal 300 ECG, have a premature heart cycle 312. In this example, the cardiac cycles 304, 308 and 316 are considered "normal" in the sense that they generally occur at a time when expected (although they may be affected by a premature heart cycle 312, as discussed below), based on time intervals with a duration of one (1) second, as shown for cardiac cycles in figure 2.

The heart cycle 312 is premature in the sense that it occurs earlier than expected. In this example, a premature heart cycle 312 is six-tenths (0,6) seconds after the R-wave of the cardiac cycle 308 instead of one (1) s is NDI. As a consequence, diastolic period 320 of the second cardiac cycle 308 decreases or ends six-tenths (0,6) seconds instead of one (1) second after the corresponding R-wave

In addition, diastolic period 324 premature heart cycle 312 is extended. In this example, the diastolic period of the premature heart cycle 312 is extended so that the distance from the R-wave of the cardiac cycle 308 to R-wave of the next "normal" cardiac cycle, cardiac cycle 316 is approximately the same length as the distance between two normal cardiac cycles, or approximately two (2) seconds.

Additionally, there will be described an analyzing component 136, the component 140 windowing and recommendation component 144. In the following examples it is assumed that processing component 132 are provided signal 300 ECG, have a premature heart cycle 312, identification of early cycle 312 and the window reconstruction and the desired cardiac phase.

The analyzing component 136 determines the impact that a premature heart cycle 312 provides data identified for reconstruction using the reconstruction and the desired cardiac phase. Cardiac cycles 304 and 316 premature heart cycle 312 is not affected. As a result, the window reconstruction in PR the Affairs of these cardiac cycles correspond to the desired cardiac phase.

In contrast, cardiac cycles 308 and 312 effect (as discussed above) that cardiac cycle 308 is shortened, and the heart cycle 312 is extended. As a result, window renovation, located inside the cardiac cycle 308, based on the percentage of the duration of the cardiac cycle 308 is at a relatively early time within the cardiac cycle, and the window reconstruction, located within the heart cycle 312, based on the percentage of the duration of a heart cycle 312 is relatively late time within the cardiac cycle.

In relation to the cardiac cycle 308 analyzing component 136 determines whether the window reconstruction before or after the premature heart cycle 312 from the point of view of time relative to its peak of R-wave

On figa shows the case in which the window 408 reconstruction is located within the cardiac cycle 308 time relative to the peak R-wave after the premature heart cycle 312. It should be understood that alternative can be used to link other than the link on the peak of the R-wave

As shown in the drawing, a premature heart cycle 312 is approximately six-tenths (0,6) seconds after the peak of the R-wave of the cardiac cycle 308, and window 404, 408, 412 and 416 reconstruction are approximately seventy (70) percent of the (%) from their respective beginning of the cardiac cycle. As a result, from the point of view of time after the peak of the R-wave window 408 reconstruction is approximately forty-two hundredths (0,42) seconds instead of about seven-tenths (0,7) seconds from the peak R-wave for Windows 404 and 416 reconstruction within intact cardiac cycles 304 and 316.

The analyzing component 136 detects that the window 408 reconstruction does not correspond to the desired cardiac phase and data reconstruction are insufficient for the purposes of reconstruction, as they contain data corresponding to a different cardiac phase. Component 140 windowing removes the window 408 reconstruction, so that the relevant data were not selected for the reconstruction or reconstructed. This is shown in fig.4b. In General, if the window reconstruction appears time after the peak of its corresponding R-wave or later than the premature heart cycle, the window reconstruction is removed, so that the relevant data was not chosen for the reconstruction or were not reconstructed.

On figa shows the case in which the window 508 reconstruction is located within the cardiac cycle 308, in time relative to the peak R-wave before a premature heart cycle 312.

As shown in the drawing, a premature heart cycle 312 appears in approximately six-tenths (0,6) CE is Andy after the peak of the corresponding R-wave, and window 504, 508, 512 and 516 reconstruction are approximately forty (40) percent (%) of the duration of their respective cardiac cycles. From the point of view of time after the peak of the R-wave window 508 reconstruction is at a distance of approximately twenty-four hundredths (0,24) seconds after the peak of its corresponding R-wave instead of the approximately four-tenths (0,4) seconds after the peak R-wave like Windows 504 and 516 reconstruction within intact cardiac cycles 304 and 316.

Cardiac cycle 308 until a premature heart cycle 312 is regular, so the data within this area are normal or such as if a premature heart cycle never happened. The analyzing component 136 recognizes that a premature heart cycle 312 made box 508 reconstruction to drift away from the desired cardiac phase, resulting in insufficient data reconstruction.

Component 140 windowing removes or moves the window 508 reconstruction, from the point of view of time, so that it is away from its peak of R-wave based more on time than on the percentage of the time duration of the cycle. As a result, the window reconstruction is moved to the position spaced approximately four-tenths (0,4) seconds from the R-wave of a wave, so OK what about 508 reconstruction corresponded to the desired cardiac phase. This is shown in fig.5b.

As for the premature heart cycle 312, the loop 312 is always, to some extent, pathological and therefore optimally, so it was removed. The analyzing component 136 determines whether there is a gap in the data after removal of the window 412 or 512. If the gap data is missing, the window 412 or 512 is removed, as shown in figs and 5c.

If data gap exists, then the component 140 windowing produces optimal use of available data. For atrial extrasystoles cycle 312 is approximately normal, so the window 412 reconstruction is placed approximately seven-tenths (0,7) seconds after the R-wave cycle 312, as shown in fig.4d, and the window 512 reconstruction is located approximately four-tenths (0,28) seconds after the R-wave cycle 312, as shown in fig.5d.

For ventricular extrasystoles cycle 312 is more pathological. Window 412 is located at a distance of approximately three-tenths (0,3) seconds (1 second-0.7 seconds) before the next R-wave, as shown in figa. Window 512 is located at the distance of four-tenths (0,28) seconds after the R-wave cycle 312 (like for atrial extrasystoles, as described above), as shown in figa.

The analyzing component 136 determines that there is a gap of data, if the window is removed, defining, mo the ut whether the data the corresponding remaining boxes reconstruction, to provide sufficient data for the purposes of reconstruction, so that no missing data. One way of approaching, are there sufficient data contains check to see satisfied if the inequality in equation 1:

(T*TS)>(SC*T/RT)Equation 1,

in which T represents the time interval, TS is the speed of the table, SC represents the x-ray beam collimation and RT is the rotation of the x-ray source. The time interval T is measured from the previous window normal reconstruction to open reconstruction following the normal cardiac cycle. If the product of time interval and the speed of the scanner table more data gap exists and there is insufficient data to reconstruct the image at all locations along the z axis.

If changing the position semidesyatiletnego (70%) of the Windows of the reconstruction, as described above with reference to fig.4d and 4e, results in rupture data, then the recommendation component 144 provides a global recommendation. For global recommendations recommendation component 144 recommends a completely new renovation in the other phase(s) located to the early R-wave, as shown in Fig.6. In this example, the recommended phase is coronarienne (40%) phase shown in figa. This ensures the correct window reconstruction for loop 308 and provides the option to resolve, delete, or move the location of the window reconstruction for cycle 312, and thus, ensures the presence of one or more reconstruction without data gaps. Semitestacea (70%) phase is reconstructed in accordance with fig.4b-e and new coronarienne (40%) phase is reconstructed in accordance with fig.5b-e.

7 shows an example of a method for selecting the optimal window reconstruction system 100. At step 704 receives the ECG signal, synchronized with the projection data. At step 708 abnormal cardiac cycle, such as premature heart cycle is identified within the ECG signal, and the desired cardiac phase is selected for reconstruction. Based on this information, the 128 processing determines the optimal use of available data in the presence of anomalies in the heart signal.

At step 712 the analyzing component 132 determines whether the anomaly to the window reconstruction, the corresponding cardiac phase that is different from the desired cardiac phase. If it does not, open reconstruction or data corresponding boxes reconstruction, are selected for reconstruction.

However, if the anomaly affects data reconstruction, then at step 716 determines whether there are sufficient data available to the affected window reconstruction could be removed without creating a gap in the data. If sufficient data exist, then at step 720 the window reconstruction is removed, and the remaining window reconstruction or data corresponding to them, are selected for reconstruction.

Otherwise, at step 724 the affected window reconstruction is moved, as described above, and the Windows of the reconstruction or the data corresponding to them, are selected for reconstruction.

At step 728 determines that did the moving window reconstruction gap data. At step 732, if the data has been entered, it is also recommended that a new reconstruction with sufficient data.

On Fig, 9 and 10 graphically shows an example. Originally referring to Fig, an example of the ECG signal with the Windows 804, 808, 812, 816 and 820 reconstruction covers phase, located at a distance of approximately seventy-five (75) percent (%), respectively, within each cardiac cycle 824, 828, 832, 836, and 840, as shown in the drawing. Cardiac cycle 836 identified as premature atrial beats (APB).

In this example, a premature heart cycle 836 begins in front of the window 812 reconstruction when the window 812 reconstruction begins at the time of otnositelnaya R-wave 848 cardiac cycle 832. Windows 804-840 reconstruction are based on the percentage of the duration of the cardiac cycle, cardiac cycle 832 shortened, window 812 is suboptimal because it does not correspond to the desired cardiac phase within seventy-five (75) percent of the average duration of the cardiac cycle. As a result, box 812 reconstruction is removed, as shown in Fig.9.

Premature cardiac cycle 836 is pathological and therefore, the system examines whether there can be also removed the window 816. Since this results in missed data, applies an alternative strategy, and the box 816 reconstruction moves in a more optimal position, as shown in Fig.9, based on the time from the peak of the R-wave of premature cardiac cycle 836.

In this example, the removal of both Windows 812 and 816 reconstruction leads to incomplete data for the purposes of reconstruction, while removing the window 812 and moving box 816, as described above, may lead to suboptimal correction. As an alternative, it is recommended that a new phase of reconstruction of 45%, the corresponding Windows 1002, 1004 and 1008, as shown in figure 10. This now allows you to delete window 1006, belonging to the premature cycle 836.

Now describe other aspects.

In the shown embodiment, the operator identifies premature heart condition is the first cycle within the ECG signal. In an alternative embodiment, component 132 processing automatically identifies abnormal cardiac cycles using the detector 156 premature cardiac cycle. In one example, component 132 processing prompts to the operator the need to give confirmation. In another example, automatically identified abnormal cardiac cycle is automatically treated as abnormal cardiac cycle.

In the shown embodiment, the operator provides the desired cardiac phase. In an alternative embodiment, component 132 processing automatically recommends the window reconstruction and/or phase reconstruction based on the ECG signal and the abnormal signal, without user input of the desired cardiac phase.

In another embodiment, component 128 processing automatically determines the location of abnormal cardiac cycles, selects the optimal phase reconstruction based on abnormal cardiac cycle, and creates a window of reconstruction for each cardiac cycle. Alternatively, component 128 processing automatically starts the reconstruction of the data set for reconstruction.

In the above description, a new phase is recommended only when there are insufficient data. It should be understood that in an alternative embodiment, in which when it is recommended that additional new phase. In one example this increases the possibility of obtaining a good reconstruction.

Processing component 132 containing the analyzing component 136, the component 140 windowing and recommendation component 144 may be implemented by machine-readable commands that, when executed by the processor(s) of the computer, cause the processor(s) to perform the described methods. In this case, the commands are stored on a computer-readable storage medium associated with the computer or otherwise gaining access to the appropriate computer.

Note also that the described methods need not be performed simultaneously with data collection. They can also be performed using the computer (or computers), associated with the scanner 100; they can also be located at a distance from the scanner 100 and get access to relevant data on the corresponding communication network, such as the system HIS/RIS, PACS system, the Internet or the like.

Application of the foregoing and its variations contain, in particular, the selection of the suitable data for strobing CT images using magnetic resonance imaging (MRI), nuclear cardiology and three-dimensional (3D) echo studies.

The invention has been described with reference to preferred options for implementation. After reading and understanding of PR is destfolder detailed descriptions may be other modifications and changes. Understood that the invention should be interpreted to include all such modifications and changes as far as they fall within the scope of the appended claims or their equivalents.

1. The receiving system image that contains:
component (140) windowing, which receives the ECG signal containing a premature heart cycle and the previously obtained x-ray projection data of the beating heart and the ECG signal are synchronized in time with a pre-obtained x-ray projection data of the beating heart, and component (140) windowing the first window reconstruction within the first cardiac cycle to correspond to the desired cardiac phase previously obtained x-ray projection data, when a premature heart cycle ensures compliance with the first window reconstruction of another cardiac phase; and
device (148) reconstruction, which reconstructs the projection data corresponding to the set UPS reconstruction of different cardiac cycles, to create image data, characteristic of the desired phase of the heart.

2. The system according to claim 1, in which component (140) windowing changes the position of the first window reconstruction in time relative to pornog the signal within the first cardiac cycle, when the first time interval from the reference signal to the first window reconstruction is less than the second time interval from the reference signal to a premature heart cycle.

3. The system according to claim 1, in which component (140) windowing removes the first window of reconstruction, when the first time interval from the reference signal to the first window reconstruction is greater than the second time interval from the reference signal to a premature heart cycle.

4. The system according to claim 3, additionally containing a recommendation component (144), which recommends another phase, which ensures that the first time interval from the reference signal to the first window reconstruction will be less than the second time interval from the reference signal to a premature heart cycle.

5. The system according to claim 1, in which the first cardiac cycle is premature heart cycle.

6. The system according to claim 5, in which component (140) windowing tries to remove the first window reconstruction, provided that no data gap does not occur.

7. The system according to claim 5, in which component (140) windowing changes the position of the first window reconstruction in time relative to the reference signal within the first cardiac cycle, when a premature heart cycle is the atrial beats.

8. The system is as according to claim 5, in which component (140) windowing changes the position of the first window reconstruction in time relative to the reference signal in a subsequent cardiac cycle, when a premature heart cycle is ventricular beats.

9. The system according to claim 1, additionally containing a recommendation component (144), which recommends the second phase of the reconstruction, when the second phase has a relatively higher probability of having sufficient data for reconstruction after removal of the window reconstruction due to premature cardiac cycle.

10. The system of claim 8, further containing remote (152), in which the operator through the console (152) of the input data that confirm or reject the recommended cardiac phase for reconstruction.

11. The system according to claim 1, additionally containing the remote controller (152), in which the operator through the console (152) provides input data that identifies the premature heart cycle within the ECG signal.

12. The system according to claim 1, additionally containing the remote controller (152), in which the operator provides input through the remote controller (152), which identify the desired cardiac phase.

13. The receiving system image that contains:
component (140) windowing, which removes the first window reconstruction corresponding to the suboptimal cardial the phase previously obtained x-ray projection data of the beating heart due to the abnormal signal in the ECG signal, moreover, the ECG signal is displayed in time with the previously obtained x-ray projection data of a beating heart over many cardiac cycles, and the component (140) control adds Windows replacement window reconstruction to optimize the data set for the reconstruction, based on the abnormal signal and available prior projection data; and
device (148) reconstruction, which reconstructs the data set for reconstruction, to create image data, characteristic of the desired phase of the heart beat.

14. The system of item 13, in which the anomalous signal is premature heart beat.

15. The system of item 13, further containing a recommendation component (144), which recommends the replacement window reconstruction.

16. The system of item 13, in which component (140) windowing automatically adds the replacement window reconstruction.

17. The system of item 13, further containing device (156) detection of abnormal signal, which automatically locates and identifies anomalous signal in the ECG signal.

18. The system of item 13, in which component (140) windowing moves at least a second window reconstruction within the cardiac cycle to correspond to the desired cardiac phase to the Yes anomalous signal causes a second window reconstruction to match another cardiac phase.

19. The system of item 13, in which component (140) windowing adds a second window reconstruction, if the first product of the time interval from the previous normal window reconstruction subsequent to normal window reconstruction and speed table (124) in the longitudinal direction more than the second piece of collimation of the x-ray beam and the time of rotation of the x-ray source, divided by the time interval.

20. The receiving system image that contains:
recommendation component (144), which recommends the window reconstruction for cardiac phase within many prior consecutive cardiac cycles based on the ECG signal and arrhythmias in it, and the ECG signal obtained while scanning a beating heart using a computer tomographic scanner (100); and
device (148) reconstruction, which reconstructs the data corresponding to the data for each cycle corresponding to the window reconstruction.

21. The system according to claim 20, in which the window reconstruction corresponds, in General, a stationary state of the heart.

22. The system according to claim 20, in which the window reconstruction corresponds to the data with a relatively high probability of the absence of any data gaps after removing the window reconstruction due to arrhythmia.

23. Sist the mA in claim 20, in which the operator selects the starting cardiac phase, and the recommended window reconstruction corresponds to a different cardiac phase.

24. The system according to claim 20, in which the recommendation component (144) recommends at least a second window reconstruction corresponding to a different cardiac phase.

25. The receiving system image that contains:
component (140) windowing, which automatically changes the location or moves the first window reconstruction for cardiac cycle, on the basis of a premature heart cycle within the ECG, which is a signal synchronized with a pre-obtained x-ray projection data of the beating heart;
recommendation component (144), which automatically recommends at least one additional window reconstruction, on the basis of a premature heart cycle; and the device (148) reconstruction, which reconstructs the data corresponding reconstruction Windows.

26. System A.25, in which data reconstruction represent the optimal data set that contains the complete data set for reconstruction and reduces the artifact entered from the data for the reconstruction corresponding to different cardiac phases.

27. System A.25, in which the system is a computer tomography scanner (CT.

28. The method of obtaining image containing the steps are:
take ECG signal containing a premature heart cycle, and the ECG signal is synchronized with the previously obtained x-ray projection data of the beating heart for many cycles heartbeat;
move the first window reconstruction within the first cardiac cycle, which corresponds to the data other than the desired cardiac phase due to premature cardiac cycle, each of the multiple cardiac cycles contains the reconstruction; and
remodel previously obtained projection data corresponding to the many Windows of reconstruction, to create image data, characteristic of the desired phase of the heart beat.

29. The method according to p, optionally containing phase, which moves the second window reconstruction within premature cardiac cycle relative to the reference signal in a premature heart cycle time or relative to the reference signal in the next cardiac cycle time, depending on the type of premature cardiac cycle.

30. The method according to p, optionally containing phase, which removes the first window reconstruction.

31. The method according to p, optionally containing a stage, on which the recommendation is for data reconstruction for another second cardiac phase.

32. The method according to p, optionally containing phase, which add at least one window reconstruction, which corresponds to a different cardiac phase.

33. Machine-readable data carrier containing commands that, when executed by a computer, cause the computer to perform a method of obtaining images p.

34. Machine-readable data carrier on p, in which the computer is a remote (152) of the system (100) computed tomography, comprising:
rotating source (108) radiation emitting x-ray radiation traversing the study area (116); and
detector (112), which rotates synchronously with the source (108) radiation and detects radiation traversing the study area (116), and the detector generates projection data that is synchronized in time with the ECG signal.



 

Same patents:

FIELD: medicine.

SUBSTANCE: invention relates to medicine, oncology and can be used in any oncologic, radiological institutions. Method includes carrying out computed tomography and calculation of maximal transverse dimension and area on the same level of the largest affection before and after chemical therapy. Regression of more than 80% on maximal transverse dimension and more than 85% on affection area corresponds to adequate response to treatment.

EFFECT: method ensures accuracy of estimation of tumour mass regression in case of Hodgkin lymphoma, disease prediction and correction of further treatment tactics.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, X-ray diagnostics. Method includes calculation of volume and area of surface of tongue and oral cavity, estimation of functional mobility of tongue. For this purpose examination is performed by protocol of brain scanning in children of early age with minimal physical-technical characteristics, with cut thickness 0.5 mm. Examination includes scanning proper of patient's maxillofacial region consisting of three stages: native contrast-free scanning, scanning with phonation of "A" sound, scanning with phonation of "И" sound and post-processor processing of obtained data in soft-tissue mode in standard axial, sagittal and frontal planes, as well as in arbitrary planes. Standard programme of multispiral computed tomography is used to measure areas of surfaces and volumes.

EFFECT: method ensures accuracy and reliability of estimation of surface area and volume of tongue and oral cavity in said group of patients, acceleration of diagnostics with absence of invasiveness, without application of additional means, maximal comfort for patient with their minimal involvement.

1 ex

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to devices and methods of computer tomography. Tomographic apparatus includes, at least, two X-ray sources which are put in action simultaneously by means of different communication patterns for formation of unambiguously coded irradiation, at least, two detectors, each of which detects initial irradiation, emitted by corresponding to it one of X-ray sources, and irradiation of side dispersion from the remaining two X-ray sources. Each of detectors generates composite signal. After that, decoupler basing on different commutation patterns recognizes signal, corresponding to at least one of X-ray sources, within composite signal and correlates identified signal with corresponding to it X-ray source. In method of image reconstruction tomographic apparatus for formation of object image within visualisation area is used. In the second version of implementation tomographic apparatus contains means for simultaneous generation of groups of unambiguously codes X-ray beams, means for detection of initial irradiation, emitted first beam of coded X-ray beams, means for detection of side dispersion from second beam of coded X-ray beams. Means for detecting initial irradiation and means for detecting irradiation of side dispersion are made with possibility of generation of composite signal, which includes components, characteristic of detected initial irradiation and irradiation of side dispersion. Means for identification of initial irradiation source is based on composite signal.

EFFECT: application of invention makes it possible to increase time resolution of obtained images and reduce rotation rate gantry.

29 cl, 8 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to X-ray scanners for examination of patients. Device for examination contains X-ray module of C-arc, rack for supply of electric energy and cooling for X-ray source, connecting device, made with possibility of C-arc rotation on more than 360 degrees and containing rotating coupling for passing of coolant from rack to C-arc module during C-arc rotation. Method of examination of object under interest consists in supply of electric energy and cooling from rack to X-ray source of C-arc module through connecting device, rotation of C-arc on more than 360 degrees together with supply of electric energy and cooling and bringing coolant from rack to module during C-arc rotation by means of rotating coupling. Machine-readable carrier stores computer programme for examination of object under interest in correspondence with the method.

EFFECT: application of invention makes it possible to increase image quality, increase rate of rotation and ensure cooling of X-ray source during complex rotations.

10 cl, 7 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine, diagnostics in dentistry and lies in placing on-skin points from radiopaque substance or material on patient's skin and further registration of computer tomography in lateral projection of region of temporomandibular joint with reflection of said points. First on-skin point (I) is placed on line passing from Tragus medialis to the lowest point of eye socket, at the distance 11 mm from Tragus medialis towards eye socket. Second on-skin point (II) is placed at the distance 4 mm above I on the line originating from I and perpendicular to line, passing from Tragus medialis to the lowest point of eye socket. Third (III) and fourth (IV) on-skin points are placed at the distance 2 mm on the sides from II on line, parallel to line, passing from Tragus medialis to the lowest point of eye socket. On computer tomography first line is drawn from upper edge of auditory meatus to point, corresponding to lower edge of eye socket. From this line perpendicular line is drawn downwards tangent to posterior convex edge of articular head of lower jaw (LJ). Then perpendicular line is drawn downwards tangent to anterior convex edge of articular head of LJ, and lower line, passing through joint neck and parallel to first line. Within the delineated zone point of projection of LJ head axis is found and its coordinates are determined with respect to projections of on-skin points on hemogram. After that, projection of point of patient's LJ head axis on tomogram is transferred on patient's skin in region of previously applied on-skin points.

EFFECT: method ensures accuracy of finding LJ head axis and increase of accuracy of carried out treatment of any complexity in this region due to correct placement of projection of LJ head axis on patient's skin.

3 dwg

FIELD: medicine.

SUBSTANCE: invention refers to ophthalmology and aims at examining lachrymal passages. For this purpose, the examination is preceded by preparing the mixture of Omnipaque concentrated 300 mg/ml and collargol in the ratio of 1: 0,05. The mixture is instilled in a conjunctival cavity three times in a seated position. After the patient has subjective sensation of the presence of an opaque solution in a nasal or nasopharyngeal cavity, the prepared mixture is instilled from a supine position. It is followed by multi-spiral computed tomography.

EFFECT: method enables estimating the functional condition of lachrymal passages along with the anatomic-topographical features to be followed by choosing an adequate approach.

6 dwg, 2 ex

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to neurosurgery, neurology and functional diagnostics. An electroencephalogram is registered before and after carrying out rehabilitation course. During processing of recording of brain bioelectric activity, isolated independent components are analysed. For each independent component power spectrum is received with application of Fourier transform and their indices Index 1 and Index 2 are calculated by formula Index=(δ+θ)/(α+β). Electromagnetic tomography of low resolution is performed for each independent component, location of maximum of equivalent current density is determined in Talerak atlas coordinates and they are grouped on Brodmann areas. In case of frontal localisation they are grouped on areas 10, 11, in case of occipital localisation - on areas 18, 19. Dynamics of calculated absolute indices is estimated. If absolute values of indices Index 2/Index 1 of spectrum of power of independent components of frontal and occipital localisations decrease, tendency to favourable outcome of patient's severe craniocerebral trauma is diagnosed, if absolute values of said indices increase, tendency to unfavourable outcome of said trauma is diagnosed.

EFFECT: method makes it possible to increase reliability of diagnostics.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, traumatology, orthopedics and radiodiagnostics and is intended for determination of relative mineral density (RMD) of bone distraction regenerate (BDR). Method includes application of computer programmes in processing of digital image of traditional roengenogram, which is examined in programme ADOBE® PHOTOSHOP®, automatically determining mean optic density (D) of isolated zone of BDR and adjacent to it proximal and distant bone tissue in optic units (o.u.). After that BDR RMD is calculated by formula 2×Dr×100/Dp+Dd=Kr(%), where: Dr is mean optic density of BDR (o.u.); Dp is mean optic density of proximal bone fragment (o.u.); Dd is mean optic density of distal bone fragment (o.u.); Cr is BDR RMD (%). If Kr is 100 and higher, BDR RMD is normal, Kr is lower than 100% - RMD is reduced.

EFFECT: method makes it possible to determine degree of BDR "maturity" in dynamics, is universal and non-invasive.

1 ex, 1 tbl, 4 dwg

FIELD: medicine.

SUBSTANCE: invention relates to computer tomography. Device for collection of data of tomographic projections in multitude of angular positions relative to an object, located in the examination area, contains radiation source, detector, source and transversal centre of detector being transversally displaced relative to the centre of transversal field of view during collection of data of projections and direction of transversal displacement being tangential with respect to transversal field of view. Methods of computer tomography contains stages, at which first irradiation is emitted from position which is transversally displaced from the centre of transversal field of view, detector of irradiation is used for collection of data of computer-tomographic projections, stages of first irradiation emission and application of irradiation detector for collection of data of computer-tomographic projections are repeated and first set of CT data is reconstructed to form first three-dimensional data. Computer-tomographic device contains roentgen source transversally displaced from rotation axis, roentgen detector, also transversally displaced from rotation axis and rotating relative to rotation axis in state of constant mechanical connection with roentgen source. Roentgen source emits irradiation, characterised by transversal angle of fan beam, and complete taking of angular readings of transversal field of view requires collection of data of projections in larger angle range than 180° plus the angle of fan-beam. Device also contains unit of reconstruction of data of projections for formation of three-dimensional data, characterising transversal field of view.

EFFECT: increase of device efficiency.

39 cl, 9 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to visualisation systems in computed tomography. System includes X-ray source which rotates around examined area and moves along longitudinal axis. X-ray source remains in the first position on longitudinal axis during rotation around examined area, accelerates to the rate of scanning and performs through scanning of the area of interest, in which, at least one hundred and eighty degrees plus angle of fan-beam of data is are achieved. In the second version of system implementation X-ray source simultaneously rotates around examined area and moves along longitudinal axis, when irradiation is emitted during scanning. Motion of X-ray source and emission of X-rays by it are coordinated and controlled by means of character of movement of human body, located within examined area. In the third version of system implementation through scanning is controlled by periodic movement of scanned organ. Method of computed tomography lies in supporting X-ray source in static longitudinal position on z-axis with its rotation around examined area, movement of X-ray source in direction along z-axis with desired character of movement of human body, located within examined area and activation of X-ray source for irradiation.

EFFECT: application of invention makes it possible to perform through scanning controlled by periodic movement of scanned organ.

34 cl, 7 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine, oncology and can be used in any oncologic, radiological institutions. Method includes carrying out computed tomography and calculation of maximal transverse dimension and area on the same level of the largest affection before and after chemical therapy. Regression of more than 80% on maximal transverse dimension and more than 85% on affection area corresponds to adequate response to treatment.

EFFECT: method ensures accuracy of estimation of tumour mass regression in case of Hodgkin lymphoma, disease prediction and correction of further treatment tactics.

2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, X-ray diagnostics. Method includes calculation of volume and area of surface of tongue and oral cavity, estimation of functional mobility of tongue. For this purpose examination is performed by protocol of brain scanning in children of early age with minimal physical-technical characteristics, with cut thickness 0.5 mm. Examination includes scanning proper of patient's maxillofacial region consisting of three stages: native contrast-free scanning, scanning with phonation of "A" sound, scanning with phonation of "И" sound and post-processor processing of obtained data in soft-tissue mode in standard axial, sagittal and frontal planes, as well as in arbitrary planes. Standard programme of multispiral computed tomography is used to measure areas of surfaces and volumes.

EFFECT: method ensures accuracy and reliability of estimation of surface area and volume of tongue and oral cavity in said group of patients, acceleration of diagnostics with absence of invasiveness, without application of additional means, maximal comfort for patient with their minimal involvement.

1 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, in particular, to children's surgery. Examination, ultrasound examination and computer tomography of organs of abdominal cavity and retroperitoneal space are carried out in injured children. Data of SAP hemodynamics, heart rate, blood hemoglobin, degree of trauma/hemorrhagic shock, level of free fluid (blood) in minor pelvis of abdominal cavity, degrees of destruction of inner organs parenchyma are taken into account. Injured children are referred to "stable", "conditionally stable", "unstable" groups.

EFFECT: method makes it possible to carry out differential clinical sorting, improve results of treating children with traumatic injuries of organs of abdominal cavity and retroperitoneal space.

FIELD: medicine.

SUBSTANCE: invention relates to medicine, oncology. Method is performed in two steps, each step is performed in accordance with the principle of simultaneous double contrasting, during which insufflation of air is performed immediately after introduction of small volume of barium suspension into large intestine. At the first state barium suspension in concentration 240 g of barium sulfate per 300 ml of cool water is used. At the second stage, after emptying intestine, 120 g per 300 ml of warm water are introduced.

EFFECT: method ensures efficiency of contrasting of all parts of large intestine, including passing through tumour stenoses with dimensions 2-3 mm, extension of arsenal of means for carrying out irrigoscopy in case of said pathology.

2 cl

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to devices and methods of computer tomography. Tomographic apparatus includes, at least, two X-ray sources which are put in action simultaneously by means of different communication patterns for formation of unambiguously coded irradiation, at least, two detectors, each of which detects initial irradiation, emitted by corresponding to it one of X-ray sources, and irradiation of side dispersion from the remaining two X-ray sources. Each of detectors generates composite signal. After that, decoupler basing on different commutation patterns recognizes signal, corresponding to at least one of X-ray sources, within composite signal and correlates identified signal with corresponding to it X-ray source. In method of image reconstruction tomographic apparatus for formation of object image within visualisation area is used. In the second version of implementation tomographic apparatus contains means for simultaneous generation of groups of unambiguously codes X-ray beams, means for detection of initial irradiation, emitted first beam of coded X-ray beams, means for detection of side dispersion from second beam of coded X-ray beams. Means for detecting initial irradiation and means for detecting irradiation of side dispersion are made with possibility of generation of composite signal, which includes components, characteristic of detected initial irradiation and irradiation of side dispersion. Means for identification of initial irradiation source is based on composite signal.

EFFECT: application of invention makes it possible to increase time resolution of obtained images and reduce rotation rate gantry.

29 cl, 8 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to X-ray scanners for examination of patients. Device for examination contains X-ray module of C-arc, rack for supply of electric energy and cooling for X-ray source, connecting device, made with possibility of C-arc rotation on more than 360 degrees and containing rotating coupling for passing of coolant from rack to C-arc module during C-arc rotation. Method of examination of object under interest consists in supply of electric energy and cooling from rack to X-ray source of C-arc module through connecting device, rotation of C-arc on more than 360 degrees together with supply of electric energy and cooling and bringing coolant from rack to module during C-arc rotation by means of rotating coupling. Machine-readable carrier stores computer programme for examination of object under interest in correspondence with the method.

EFFECT: application of invention makes it possible to increase image quality, increase rate of rotation and ensure cooling of X-ray source during complex rotations.

10 cl, 7 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine, to surgical colo-proctology. Standard upper mesentericography is carried out. A series of pictures are taken in frontal plane. Angioarchitectonics of ileoascendocecal complex is estimated. Sufficiency of length on the basis of anatomy of vascular bed of said complex is determined by the scheme: Sum of lengths of iliac-large intestine artery a.ileocolica and ascending branch of iliac-large intestine artery r.ascendens a.ileocolica with marginal vessel to confluence with a.colica media must be larger or equal length from orifice of iliac-large intestine artery a.ileocolica to pubococcygeal line.

EFFECT: method makes it possible to simultaneously estimate ileoascendocecal complex angioarchitectonics and objectively with mathematical accuracy estimate possibility of its bringing down with formation of ascendo-rectal anastomosis.

1 dwg

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to X-ray diagnostics. On pelvis X-ray, made in direct projection arch (a) is drawn on upper edge of acetabulum, which is continued downwards medially to the level of "tear figure". Horizontal line (b) is drawn on upper edge of hip head and vertical line (c) is drawn on medial edge of hip head. The greatest distances between arch and lines - segments AB and CD are measured. Value of degree of hip head decentration is calculated in % by formula: DD=100-AB/CD × 100%, where DD is degree of hip head decentration in %; AB is width of medial space of acetabulum, distance between lines (a) and (b); CD is width of upper space of acetabulum, distance between lines (a) and (c). If value of decentration degree constitutes more than 12%, unfavourable outcome of Legg-Calve-Perthes disease is predicted and surgery is recommended to patient. If value of decentration degree equals or is lower than 12%, favourable outcome of Legg-Calve-Perthes disease course is predicted and conservative treatment of Legg-Calve-Perthes disease is recommended.

EFFECT: method makes it possible to determine risk of pathologic process development and select correct tactics of patient's treatment.

2 ex, 3 dwg

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to operative orthopedics, and can be used for predicting results of radical correcting operations in patients with traumatic injury of spine. Essence of method lies in determination of kyphotic deformity of spine, deficit of spinal canal lumen, resorption of bone tissue around elements of construction. After that, said parameters are evaluated in points in early post-operative period and, minimum, 3 months after operation by formula: KD+DSCL+RBT=number of points, where KD is kyphotic deformity, degrees; DSCL is deficit of spinal canal lumen, %; RBT is resorption of bone tissue around screw, mm. After that difference of respective values of parameters is determined. If sum of point difference equals or is less than 3 points, result is estimated as excellent. If sum of point difference is from 4 to 9 points, result is estimated as good. If sum of point difference is from 10 to 23, result is estimated as satisfactory If sum of point difference is higher than 24, result is estimated as unsatisfactory.

EFFECT: application of claimed invention makes it possible to estimate results of surgical treatment of spine injuries, including distant period, by objective X-ray parameters.

1 tbl, 1 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, diagnostics in dentistry and lies in placing on-skin points from radiopaque substance or material on patient's skin and further registration of computer tomography in lateral projection of region of temporomandibular joint with reflection of said points. First on-skin point (I) is placed on line passing from Tragus medialis to the lowest point of eye socket, at the distance 11 mm from Tragus medialis towards eye socket. Second on-skin point (II) is placed at the distance 4 mm above I on the line originating from I and perpendicular to line, passing from Tragus medialis to the lowest point of eye socket. Third (III) and fourth (IV) on-skin points are placed at the distance 2 mm on the sides from II on line, parallel to line, passing from Tragus medialis to the lowest point of eye socket. On computer tomography first line is drawn from upper edge of auditory meatus to point, corresponding to lower edge of eye socket. From this line perpendicular line is drawn downwards tangent to posterior convex edge of articular head of lower jaw (LJ). Then perpendicular line is drawn downwards tangent to anterior convex edge of articular head of LJ, and lower line, passing through joint neck and parallel to first line. Within the delineated zone point of projection of LJ head axis is found and its coordinates are determined with respect to projections of on-skin points on hemogram. After that, projection of point of patient's LJ head axis on tomogram is transferred on patient's skin in region of previously applied on-skin points.

EFFECT: method ensures accuracy of finding LJ head axis and increase of accuracy of carried out treatment of any complexity in this region due to correct placement of projection of LJ head axis on patient's skin.

3 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to pediatrics. In children of pre-school age with tuberculosis of intrathotacic lymph nodes indices of heart rhythm variability are determined: rhythmograms - interinterval differences RMSSD (ms), coefficient of variability CV (%), spectrograms - total spectrum power TR (ms2), very low frequency waves of spectrum VLF (ms2), low frequency waves of spectrum LF (ms2), high frequency waves of spectrum HF (ms2). If their values equal: interinterval differences RMSSD - 76.8±3.92, coefficient of variability CV - 9.9±0.50, total spectrum power TR - 3437±175.3, very low frequency waves of spectrum VLF - 1067±54.4, low frequency waves of spectrum LF - 1003±51.2, high frequency waves of spectrum HF - 1900.2±96,9 vegetative dysfunction is diagnosed.

EFFECT: method increases reliability of diagnostics of impairment of vegetative regulation in children with tuberculosis.

1 tbl, 1 ex

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