Multiple-energy x-ray source. RU patent 2520570.

FIELD: physics.

SUBSTANCE: invention relates to X-ray engineering. A radiation source (19) for generating X-rays for analysing an object (16) comprises a first carbon nanotube (1) on a first substrate (3) for emitting first electrons (28) and a second carbon nanotube (2) on a second substrate (4) for emitting second electrons (29); a target (13); a focusing unit (7, 9) for focusing first and second electrons on the target to generate first X-ray photons having a first trajectory (14) and second X-ray photons having a second trajectory (15). The focusing unit is adapted to be controlled such that the first and second trajectories spatially overlap before reaching the analysed object such that the trajectories of the first and second X-ray photons are distinguished from each other.

EFFECT: high resolution of the radiation source and efficiency of imaging.

12 cl, 6 dwg

THE TECHNICAL FIELD TO WHICH THE INVENTION RELATES

The present invention relates to the field of formation of x-ray radiation. In particular, the invention relates to the source for the generation of x-rays of different energies, the survey method, and items of software and computer readable media.

THE TECHNICAL LEVEL OF THE INVENTION

In many application areas imaging x-rays are used for research and analysis of the structure and properties of materials complex object type body, organs, human tissue or crystal structures. One of the main fields of health, which used x-ray radiation, is radiography. Radiography can be used to quickly obtain images with high penetrating ability, particularly in areas with a high content of bone tissue. Some applications radiography is shooting orthopantomogram, mammography, CT scan and radiation therapy.

For example, in computed tomography (CT) of the patients irradiated in advance generated by x-rays from different locations and at different angles to reconstruct three-dimensional (3-d) model of the analyzed anatomical structures. When using, for example, CT interest object can be subjected to radiation from a range of 360 degrees, and the model of interest of the object can be calculated by the so-called image projections. As for moving objects, time skew between the different sources of paintings inevitable, motion artifacts reconstructed model, still constitute a challenge.

Conventional x-ray sources are cathode filament, which emit thermal electrons. The electrons are accelerated in the beam and then bombard the target material, which then formed the x-rays. The point at which the electron beam bombards placed at an angle target or anode, is called the focal spot. A large part of the kinetic energy contained in the electronic beam is converted into heat, but some energy is transformed into x-ray photons. X-ray photons are emitted in the focal spot. Therefore, the heat absorbing electrons target to melting temperature of the material used often limits the intensity of the generated x-ray beam from the known x-ray sources.

SUMMARY OF THE INVENTION

Perhaps it is desirable to provide fast and efficient generation of x-rays for the study of interest of the object.

The goals can be achieved with the help of the object in one of the independent claims. Useful options for the implementation of the present invention is described in dependent claims.

Describes the different ways of implementing the same relate to the radiation source, device for examination, the method of generation of x-rays, the element of a computer program, and computer readable media.

According to the first sample of the embodiment of the present invention is offered radiation source for the generation of x-rays for the study of interest of the object. Thus, the source contains the first carbon nanotube for the first radiation of electrons and second carbon nanotube for radiation second electrons and additionally contains the target. In addition, contains focusing unit to focus first and second electrons on target for the first generation of x-ray photons with the first path, and the second x-ray photons with the second trajectory. Focusing the unit is designed to actuate so that the first and second trajectory overlap before reaching the interest of the object.

It should be noted that instead of using the terms first carbon nanotube and second carbon nanotube can also use the terms first group of carbon nanotubes and the second group of carbon nanotubes or emitter based on the first carbon nanotubes and emitter on the second carbon nanotubes in these or any other form of carrying out the invention. "Group" carbon nanotubes may be, by the rope, harness, service and tutu. All possible configurations of carbon nanotubes can be placed on the substrate or carrier.

In the future, may become a considerable voltage of three different types. The three types are: control voltage, voltage accelerating and focusing voltage. Thus, for example, the first control voltage can be applied between the first substrate or the first carbon nanotube on the substrate and the first gate. The first accelerating voltage may be applied between the first substrate or the first carbon nanotube on the substrate and target. In addition, for example, the first focusing voltage may be applied between the first substrate or the first carbon nanotube on the substrate and between the first part focusing block. It should be noted in addition that all voltages of different types and sources of different strains of the same type can be adjusted independently of each other.

As accelerating voltage can determine the energy of accelerated electrons, it should be noted in addition that accelerating voltage can determine the energy generated by x-ray photons. On the other hand, focusing voltage can determine the size of the focal spot, which is the area in which electrons bombard the target. Therefore, the parameters of a beam of x-ray photons and therefore the spatial resolution can be determined focusing voltage.

For example, carbon nanotubes can make two independent voltage control, with carbon nanotubes act as cathodes. With these settings, the electrons are emitted carbon tubing during the so-called field emission. The voltage control can control the intensity of the electron beam and therefore the intensity of the generated x-ray beam. For example, a voltage source can be switched between carbon tubes for the alternating application of both stress management. Both of possible mode switching can occur with high frequency, as the switching frequency can not be confined by carbon nanotubes.

When using this special configuration of carbon in the form of carbon nanotubes as the electron emitter possible to benefit from the fact that the cathodes (which are carbon tubes) should not be thermally heated for electron emission, as the issue is carried out by means of field emission. So afterglow in carbon nanotubes is missing, and possibly a fast, accurate and, given time, absolutely controlled starting and shutting down the process of electron emission. Due to the fact that electrons can be accelerated and focusing independently, they can generate x-ray photons of different energies and different parameters of the distribution type of beam diameter or divergence of each relevant generated x-ray beam. The above may allow rapid switching between emission of energy distinguished x-ray photons with an independent parameters of a beam, and the imposition of time-two different processes emissions missing. It should be noted that although the geometrical parameters of each beam x-ray beam does not depend on the parameters of the other beam, and the parameters of the two beams can be set to the same size.

The target can be performed with different geometrical forms and standard material for x-ray sources such as molybdenum, tungsten, copper or different compositions of these or other items. Possible geometry anode contain a triangular pyramid, circular, elliptical or cubic. In addition, the element can contain several different areas or items, which consist of the target material.

When using the focusing of the unit, which can be, for example, focusing electrodes, forming an electric field to reject the electrons that are accelerated accelerating voltage to the target. But you can also use multiple electrodes to focus electrons, which might be somewhat different and independent focusing stresses. Thus, the deflection of electrons can be controlled so that it was possible to change such parameters of the focal spot, as, for example, sizes and geometrical parameters, target or anode. Because of the small size of the focal spot (which corresponds to the focusing of the electron on a small spot) may lead to radiation spatial small or narrow x-ray beam, then use the x-ray photons and given a focusing device, you can obtain high spatial resolution. On the contrary, the large size of the focal spot can cause radiation wide x-ray beam, and thus you can get a low spatial radiation.

Another aspect of focusing unit is adjustability geometry of focus. You might be interested in, for example, the formation of all the focal spot or spots elliptical. The user by focusing electrodes or focusing electric fields can be configured with other geometry.

In addition, due to the configuration of focusing block the path of the first group of x-ray photons emitted by the first carbon nanotube, you can reject such a way as to bring it to a complete and accurate spatial overlap with the trajectory of the second group of x-ray photons emitted by the second carbon nanotube before photons reach the spatial coordinates of interest of the object. This means that the spatial difference between the two beams of two different zones of the target, generating x-rays, may be so small to interest the object that is possible and subsequent reconstruction can yield a result that when examining artifacts can be compared to the measurement of two x-ray beams emanating from the same source.

In other words, in the interest of the object trajectory of first and second x-ray photons can be indistinguishable among themselves, as they refer to the spatial overlap focusing block to the achievement of this provision. This corresponds to a situation in which it seems that the two photons of different types have the same source position.

In addition, compensation of voltage and mechanical modified or adapted electrodes can be adapted so that they avoid deflection of the beam between two different beams.

After passing interest of object x-ray photons can be detected with a suitable detector, and the so-called image projections can be formed, for example, a workstation or a visualization system.

Thus, the visualization system can, for example, be an x ray machine, CT (computer tomography), micro-CT, positron emission tomography (PET) in combination with x-ray device, single-photon emission CT (SPECT) in combination with x-ray device or x-ray machine in conjunction with the installation of magnetic resonance (MR) imaging, or ultrasound system.

This aspect of the invention may lead to the reconstruction model of the investigated object by images of all projections of the x-ray photons of this x-ray source are one source. Therefore, the advantage of this variant of the invention may be accurate reconstruction, which is based on two - or mnogoparametricheskikh x-ray photons, without motion artifacts.

In other words, instead of measuring specific transmitted signal energy or wavelength using, for example, of the detector energy resolution, due to this invention can light alternately, very quickly, the subject of two - or mnogoparametricheskikh x-ray photons that have the same trajectory. Knowing at what moment and what the energetic photons used, refurbished, to give sharper images with higher resolution and less motion artifacts, and you can avoid the application of the detector energy resolution.

In other words, as with the present invention can be avoided motion artifacts, you can reduce the physical effects on the patient, which are used in diagnostic examination in which you want to use x-ray radiation. You can avoid the formation of additional images in accordance with the x-ray irradiation. In addition, you can reduce operating costs, as the emitters of carbon nanotubes can also consume less energy than a conventional x-ray tube and can make smaller system design.

According to another aspect of this option exercise you can use to switch between two objects to avoid heating of the target. By applying equal conditions for the top object and bottom of the object (see figure 1) and through the implementation of overlap can be avoided fusion targets and increase the intensity of electrons and x-rays. May be another way in which the target revolves around a particular axis to strengthen these cooling effect. Consequently, it is possible to provide quick study with higher rates compared to known sources.

Thus, this aspect of the present invention does not apply to the provision of diagnostic or treatment of patients, and refers to the decision of technical problems to rapid x-ray photons of different energies, but with the same trajectory in the direction of interest of the object.

In accordance with another embodiment of the present invention focusing block contains two focusing subblock; the first subsection are designed to focus first of electrons on the target, and the second subsection made with the possibility of a second focus of electrons on the target.

In other words, by selecting the two special units for two focusing blocks can be optimised overlap of x-ray photons two different types. Then turn on and off between two independent emitters of carbon tubes with different accelerating voltage leads to the generation of two-energy x-rays and quick issue on the same trajectory.

In accordance with another embodiment of the present invention a source of radiation adapted to switch between different geometries focus first and second x-ray photons.

When using, for example, two different focusing blocks for the relevant emitted electrons, you can configure settings of the zone in which electrons bombard the target. Therefore, the spatial resolution ejects electrons part of the radiation source can be configured independently. In addition, to study special interest of interest to changing properties of a material can be useful to quickly explore the object of two x-ray beams, which vary according to their wavelengths to allow or to distinguish between different materials. This can be done using different accelerating voltages.

Consequently, it is possible to reduce ambiguity resolution type a little concerning vessels or complex vascular patterns, or overlapping elements of the body, or very dense regions of the authorities, and you can reduce operating costs, time and the necessary energy.

In accordance with another embodiment of the present invention a source of radiation adapted to switch between the different energies of first and second x-ray photons.

For example, the application of different accelerating voltages to the first and second carbon nanotubes can be generated dual energy x-ray photons. By switching between emissions, for example, the top emission unit and lower emission block, shown in figure 1, you can provide a fast dual switching. Therefore, in this or another embodiment, the invention may contain the required number of independent sources of accelerating voltage for each emission unit and can be, for example, devices for examination, which additionally contains a source of radiation.

In accordance with another embodiment of the present invention a source of radiation adapted to modulate the spatial resolution of the first and second x-ray photons.

Focusing blocks can be used to adjust different focal or focal geometries. This can cause different spatial resolution of first and second x-ray photons by using the following process. Small focal spot size can lead to spatial small or narrow the emitted x-ray beam, and with the data of x-ray photons can be achieved high spatial resolution. On the contrary, the large size of the focal spot can lead to a wide x-ray beam, and thus can achieve a low spatial radiation.

As the objects of interest can be of different structural complexity and density of the material, different spatial resolution can lead to increased information on the relevant object. Exposure to certain areas of interest object alternately different x-ray beams with different spatial resolutions with very fast switching, and, therefore, this expands the range of information collected during the research.

In accordance with another embodiment of the present invention a source of radiation additionally contains a body, the first carbon nanotube, the second carbon nanotube and focusing unit was integrated into the housing.

In accordance with another embodiment of the present invention a source of radiation additionally contains a body, the first carbon nanotube, the second carbon nanotube focusing the unit and the target are integrated in the housing.

The solution described above for quick switching the x-ray source in the carbon nanotubes combines two elements of carbon nanotubes in the same housing with adapted optimized focus on a single object. Association with focusing block in a small volume can be an aspect of the present invention, which can create the opportunity for a very quick double-kilovolt (kV) imaging. This can make the radiation source to be easily integrated in, for example, how the existing systems of visualization of type x-ray systems, CT or device for structural analysis.

As you can see, for example, in figure 1, building advanced mechanical protect internal components from potential damage.

Thus, carbon nanotubes can also be used as emitters based on carbon nanotubes that may consist of carbon nanotubes several different types, such as single-walled carbon nanotube, multi-walled carbon nanotubes, carbon nanotubes, which are metal or carbon nanotubes, which are semiconductor.

The geometry of carbon nanotubes can be, for example, a pie. But it is also possible cubic location carbon nanotubes around the target, as you can see, for example, in figure 2.

In other words, when continuous filling positions along an arbitrary circle around the target, the user is able to generate x-ray photons, which continuously block the required energy spectrum. This can increase the total resolution of the radiation source and can lead to quick and efficient research process with a set of more specific data generated, reflecting properties of interest of the object.

Thus, the form of the target can be adjusted to the number of carbon nanotubes used as different sources of electrons. When applying, for example, four of carbon nanotubes possible configuration of the target can be pyramidal geometry. In this four-equivalent surfaces can be covered by relevant electrons of the first, second, third and fourth carbon nanotubes.

When applying the continuum of carbon nanotubes continuously in a circular formation additional possible solution may be tapered geometry of the target or the media has a circular shape with a single target.

For example, the matrix of such emitters may be located around the target, subject to scanning, and images from each of the emitter can be collected by a computer using computer software to provide 3-d images of interest object at a fraction of the time that it may take use of conventional x-ray devices.

In accordance with another embodiment of the present invention a device surveys for the study of interest of the object, while the unit survey contains the above source. Because x-rays are used in various fields of analysis of substances, for example, for non-destructive materials testing, x-ray crystallography or extensive areas of medical research type radiography, mammography, CT and other fields, as well as in new areas of application type of quality control in the food industry, the present invention can be advantageous in many devices survey.

In particular, in the analysis of complex and dynamic objects using the device surveys radiation source described above and in the future, can provide rapid and effective two - or mnogotysyachnuyu and, therefore, two or novoeniseysky visualization.

In accordance with another embodiment of the present invention device surveys additionally contains the first and second voltage source with the first source voltage is made with the possibility of application of the first accelerating voltage to the first carbon nanotube and the second voltage source is made with the possibility of application of the second accelerating voltage to the second carbon nanotube. In addition, the difference between the first and second accelerating voltage leads to the energy difference between the first and second x-ray photons.

Because of the accelerating voltage determines the energy of the accelerated electrons, then the energy generated by x-ray photons can be determined accelerating voltage.

To create possibilities field emission of electrons from the emitters applied voltage control. Focusing the additional section controls the deflection of electrons by focusing voltage.

Switching between these two (different) electron emitters with different accelerating voltages can cause alternate emissions energy-different x-ray photons for the study of interest of the object. The two above-mentioned voltage source can be optionally integrated in one housing.

In addition, the device surveys may contain additional or instead of a source of accelerating voltage, other independent voltage sources for each emission of the block, such as voltage source or sources focusing voltage.

In accordance with another embodiment of the present invention provides a method of generation of x-rays for the study of interest of the object, the method contains the steps for building the first and second modes and switch between the first and second modes, the first mode contains the focus of the first of the electrons emitted by the first carbon nanotube, the target for the first generation of x-ray photons with the first trajectory. The second mode contains the focus of the second electrons emitted by the second carbon nanotube, the target for the second generation of x-ray photons with the second trajectory, while focus is in this way that the first and the second trajectory overlap before reaching the interest of the object.

With the rapid switching between the two modes may give the user the possibility of quick and effective analysis and research facilities, as you can gather additional information about the material and structural properties of the object. This can be done by an overlap of different x-ray beams, which are generated in different electron emitters. Because x-rays from different emitters can have different energies, the data are approximate options for the implementation of the present invention provides two-, three - or novoeniseysky visualization.

The user, for example, the doctor may cause the stages of way during the analysis, for example, of the patient. Thus, this aspect of the invention refers not to the provision of diagnostic or treatment of patients, and the solution of technical problems to rapid x-ray photons of different energies, but with the same trajectory to the interest of the object.

In accordance with another embodiment of the present invention method includes selection of the first accelerating voltage and second accelerating voltage by the user or programmatically is implemented by a computer system and set the frequency switch between the first and second modes user or programmatically implemented by a computer system, with the first of the accelerating voltage is applied to the first carbon nanotube, and the second accelerating voltage is applied to the second carbon nanotube.

It should additionally be noted that the steps of this and other embodiments of the present invention may not require interaction with a potential patient.

In accordance with another embodiment of the present invention are presented in a computer programme element, computer item that is different in that adapted for use on the computer of General purpose, to force the computer to perform the steps described method.

Computer element can optionally be performed with the possibility, when you use the computer of General purpose, to force the computer to perform interim management system, including switching carbon nanotubes or switching between carbon nanotubes.

Consequently, the above mentioned computer programme element can be stored in the computer unit, which can also be part of the alternative implementation of the present invention. Mentioned computing unit can be made with the possibility of execution or inducement execution stages of the method described above. In addition, the mentioned computing unit can be made with the possibility to operate the components of the above devices. Computing unit can be configured to work automatically and/or execution of user commands. In addition, computing unit may request from the user the choice to handle input from the user.

As, for example, can be seen in figure 5, computing unit with a computer programme element on it adapted to manage the process visualization of x-ray device that uses radiation source in accordance with another sample of the embodiment of the present invention. In addition, shown in computer readable media, with computer readable media is stored computer programme element. Mentioned in computer readable media can be, for example, by credit card (drive), which can be inserted into a computer system, to allow the computer system to manage the imaging system type shows the x-ray devices with radiation source in accordance with another sample of the embodiment of the present invention.

This option is the implementation of the present invention includes a computer program that from the very beginning of use of the invention, and a computer program that by updating turns an existing program into a program that uses the invention.

In addition, computer software element may have the opportunity of providing all necessary steps to complete method of generation of x-rays, as described in relation to the above described method and the device.

The essence of the invention may be the fact that the x-ray photons are two types with different energies generate using carbon nanotubes during alternating, very fast switching between the two modes of generation, while the trajectory x-ray photons are two types lead to overlap with each other by means of focusing block until reaching the interest of the object.

It should be noted that some of the embodiments of the invention described with reference to the various objects of the invention. In particular, some variants of realization are described with reference to the claims relating to the method, while other variants of realization are described with reference to the claims relating to a device. However, specialist in the art should be obvious from the above and the following description, which, among other things mentioned in addition to any combination of characteristics that belong to the subject matter of the same type, any combination of features related to different subjects of the invention, is also considered to be disclosed in this application.

The above aspects and additional aspects, characteristics and advantages of the present invention can also be output from the examples of the ways described below. A detailed description of the present invention is presented below with reference to the following drawings.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 - schematic representation of the x-ray source with two carbon nanotubes in accordance with example of the embodiment of the present invention.

Figure 2 - schematic representation of the x-ray source with four carbon nanotubes in accordance with example of the embodiment of the present invention.

Figure 3 diagram of the stages of way, in accordance with example of the embodiment of the present invention.

Figure 4 - schematic diagram of the device for examination in accordance with example of the embodiment of the present invention.

Figure 5 - additional schematic diagram of the device for examination under another exemplary embodiment of the present invention.

6 - for more schematic diagram of the device for examination under another exemplary embodiment of the present invention.

THE DETAILED DESCRIPTION OF OPTIONS FOR THE IMPLEMENTATION OF

Similar or related components on several figures rooms are equipped with the same positions. Views of the figures are schematic and are not in full scale.

Figure 1 shows the approximate variant of the implementation of the present invention. The x-ray source 19 contains the first carbon nanotube 1 on the first substrate 3 and the second carbon nanotube 2 on the second substrate 4. The substrate can be, for example, microchips, consisting of many different materials and layers, or substrate can be done, for example, quartz, glass or silicon. So the first voltage 5 control is applied between the first substrate 3 and the first shutter 11 to emit electrons through field emission from the first carbon nanotubes 1, which can be, as mentioned above, the set or bundle of carbon nanotubes. The first accelerating voltage 30 shall be applied first source 8 voltage between the first substrate 3 and target 13 to accelerate the emitted electrons to the target. The first accelerating voltage 30 can be applied regardless of the first voltage 5 management. First focusing voltage 40 can be applied between the substrate and the first focusing subsection 7. The first focus subsection 7 rejects accelerated first electrons emitted 28 first carbon nanotubes in such a way that the first trajectory of the first x-ray beam with the top edge 14 and the bottom 14a spatial overlaps with the second trajectory of the second x-ray beam, with the upper limit of 15 and lower bound 15a on interest object. Mentioned overlap may be so precise that you can perform excellent renovation, as if the two paths have the same position of the source. In other words: two cone beam shown in figure 1, limited by the boundaries of 14 and 14a and 15 and 15a, respectively, cover the interest object with such a degree of accuracy that the distinction may not lead to artifacts in the process of reconstruction. Thus, the interest object 16 illuminated by x-ray photons of both types, and detecting screen or detector 17 converts the information transmitted signals in image projections. The image data can be used for reconstruction. To further mechanical find the emission of photons, you can use the collimator 32, made of rentgenovskogo material. Collimator 32 is used as another tool to further align the two ways of x-rays. Besides, the body of 18.

In the upper part of Figure 1 shows the second object for independent generation of x-rays, containing the second focus subsection 9, the second source 10 voltage for the application of the second accelerating voltage 31 and contains a second voltage of 6 management. Thus, this control voltage are making between the second shutter 12 and the second substrate 4 to cause electron emission second carbon tubes 2. Thus, the second 29 electrons are emitted and accelerated towards the target 13 second accelerating voltage 31.

In addition, this exemplary embodiment of the invention may contain other voltage sources, such as springs focusing stress or sources of stress management. The mentioned sources can be external and located outside the housing, but can also be embedded, on request, in one case. Also referred to other voltages can also be gained from the first and second voltage sources.

Switching using the external switch/ control between the first, lower the object from the first carbon tube 1, the first focusing subsection 7, the first electron 28 and the first voltage 5 management and second, the top object with the second carbon tube 2, the second focusing subsection 9, the second electrons 29 and the second voltage of 6 management can provide kilovolt double and dual energy visualization, without mandatory application of the detector energy resolution. Thus you can gather additional information, and you can reduce the x-ray exposure of the patient, as well as operating costs.

Enabling/disabling of carbon nanotubes can be much faster than modulation of voltage of the generator. This can lead to the improvement of the length of time the rendering process.

In other words, two carbon tubes, placed in the position under 180 degrees to give effect to various stresses and they alternately, without overlapping, on and off at high frequency. Because carbon tube has no "afterglow" by the cold emitter, the switch can be very quick. Focusing blocks both carbon tubes are made so that the beam through the object from the anode has more or less the same trajectory that can be used for the reconstruction. The voltage compensation and modified electrodes minimize the deviation of the beam.

In other words: the different focal voltage and/or geometry set up to compensate for different geometry target-the object that results in the same trajectories for reconstruction.

Another possibility is that both of carbon tubes operate different voltages from two different high voltage generators. Alternatively, one main generator (voltage 1) can fuel a carbon tube 1, and voltage core oscillator and offset voltage smaller auxiliary generator 2 (equal to the sum of the voltage 2) can fuel a carbon tube 2.

Figure 2 also see another variant of the implementation of the present invention, it is shown that x-ray source 19 location four carbon tubes, emitting electrons. Thus, you can switch between four different pre-configured energy x-ray photons, between four different customized geometries focal spots and/or between four different spatial resolutions. All the above parameters are set independently by appropriate focusing stress and related accelerating voltages, as explained above. This figure shows four similar, but independent object, 33, 34, 35 and 36, arranged in a circle around the target 13. They can also be placed on the arrows 27 indicating the area of possible continuously posted by carbon nanotubes.

For use in CT and x-ray dual power can be a promising technology for more information about the properties of the materials of the scanned object.

All four elements of the carbon nanotubes can be powered different and independent stresses. The installation can be distributed to conical geometry of the anode and many emitters located in the circular geometry around the anode.

This source and the method can also be used to quickly switch between different geometries of focus, for example, with small focal spot on the large focal spot, by switching gates of different carbon nanotubes can also be modulated form the focal spot. An additional possibility is scanned sequentially.

Figure 3 shows the four stages of the method in accordance with another sample of the embodiment of the invention. By providing the first and second modes on stage S1 and switch between the first and second modes on stage S2 can provide dual kV visualization. In addition, the first mode contains the focus of the first of the electrons emitted by the first carbon nanotube, the target for the first generation of x-ray photons with the first path, and the second mode contains the focus of the second electrons emitted by the second carbon nanotube, the target for the second generation of x-ray photons with the second trajectory. Thus the focus perform such a way that the first and the second trajectory overlap before reaching the interest of the object.

These stages that can be called by a user or computer, managed by the software, can be added by selecting the first accelerating voltage and second accelerating voltage at the stage S3 and frequency selection switch user between the first and second modes on stage S4.

Additional steps method can contain a different choice of focusing stress or different stress management.

In addition, the reduced description contains all other steps necessary for implementing a radiation source in accordance with the above option implementation.

Figure 4 shows the device 22 examination in accordance with another sample of the embodiment of the invention. The unit 22 of the survey contains the x-ray source 19 as described above or below the approximate variant of the invention, the user interface 20 to enable communication with the user, the item 21 of the computer program to control the stages of this process, and a workstation or system 23 visualization. This visualization system can be, for example, an x ray machine, CT, or perhaps a combination of x-ray equipment with positron emission tomography. Other imaging systems. More specifically indicative options for implementation shown in figure 5 and 6. Connecting line between the above four items should be understood as the interaction between different media.

Figure 5 shows another device 22 examination in accordance with another sample of the embodiment of the invention. The system 23 visualization, in this case, x-ray equipment in the form of a C-shaped console with built-in 19 source radiation in accordance with another sample of the embodiment of the invention. This system is related to user interfaces 20. Through these interfaces, the user can manage and configure the generation and distribution of x-rays and the research process. Besides, the computer 26 with item 21 of the computer program on it. This program can automatically monitor and control the radiation source and the whole process of analysis. The results of detection of x-rays and reconstruction can be presented to the user on screens of different types, such as a computer monitor, LCD, plasma screen or video projector 25.

Figure 6 shows another device examination in accordance with another sample of the embodiment of the invention. Instead of using x-ray equipment in the form of a C-shaped console, similar to that shown in figure 5, are also used, for example, computer tomograph 38 as a visualization system. Thus, the device contains a source of 19 radiation in accordance with another option for practicing the invention. The patient 37 highlights the generated x-ray beams, which are then detected by the detector or by detecting screen 17.

Specialists in the art can be understood and implemented other types described variants of implementation in the process of practical application of the claimed invention, based on the study of drawings, descriptions and accompanying of the claims. In the claims, the expression "may contain" does not exclude other elements or phases, and the only number, indicated an indefinite article, plural. The only processor or other unit can serve several elements or phases, mentioned in the claims. The simple fact of mentioning some measures in different mutually dependent claims does not indicate what is not profitable to use a combination of these measures. A computer program can be stored/spread on appropriate media such as optical storage device or solid-state media, delivered with or as part of another of hardware, but can also spread in other forms, for example, through the Internet or through other wired or wireless telecommunication systems. None of the positions in the claims cannot be interpreted as limiting the volume.

NUMERIC POSITION

1 first carbon nanotube

2 second carbon nanotube

3 first substrate

4 second substrate

5 first voltage control

27 zone is possible continuously posted by carbon nanotubes

28 accelerated first electrons emitted by the first carbon nanotube

29 accelerated second electrons emitted by the second carbon nanotube

30 the first accelerating voltage

31 second accelerating voltage

32 collimator

33, 34, 35, 36 independent objects

37 the patient

38 computer tomograph

39 pipe or ring computer tomograph

40 first focusing voltage

41 the second focusing voltage

S1 provision of the first and second modes;

S2 switch between the first and second modes;

S3 user selection of the first voltage control and second voltage control

S4 the user selecting the frequency switch between the first and the second regimes.

1. Source (19) radiation to generate x-rays for the study of interest of the object (16), the source contains: the first carbon nanotube (1) on the first substrate (3) for the first emission of electrons (28) and second carbon nanotube (2) on the second surface (4) for the second emission of electrons (29); the target (13); focusing block (7, 9) to focus first and second electrons on target to generate the first x-ray photons with the first trajectory (14), and the second x-ray photons with the second trajectory (15); and focusing the unit is adapted to be managed in such a way that the first and the second path is given to the spatial overlap before reaching the interest of the object so that the trajectories of the first and second x-ray photons do not differ from each other.

2. The source of radiation according to claim 1 in which the focus block contains two focusing subsection (7, 9); and the first subsection (7) adapted to focus first of electrons on target; and the second subsection (9) adapted to focus the second electrons on the target.

3. The source of radiation according to claim 1 or 2, where the radiation source is adapted to switch between different geometries focus first and second x-ray photons.

4. The source of radiation according to claim 1 in which the radiation source is adapted to switch between the different energies of first and second x-ray photons.

5. The source of radiation according to claim 1 in which the radiation source is adapted to modulate the spatial resolution of the first and second x-ray photons.

6. The source of radiation according to claim 1, further comprising: building (18); the first carbon nanotube, the second carbon nanotube and focusing unit integrated in the housing.

7. The source of radiation according to claim 1, further comprising: a lot of carbon nanotubes, each carbon nanotube adapted for the emission of electrons; all carbon nanotubes are located in the geometry around the target; and focusing the unit is adapted to focus emitted electrons each carbon nanotubes on target to generate appropriate x-ray photons with the corresponding trajectories; and focusing the unit is adapted to be managed in such a way that all paths overlap before reaching the interest of the object.

8. The device surveys for the study of interest of the object, while the unit survey contains the source of the radiation according to claim 1.

9. The device examination of claim 8, further comprising: the first and second sources (8, 10) voltage, with the first source (8) voltage executed with application of the first accelerating voltage (30) to the first carbon nanotube, and the second source (10) voltage executed with application of the second accelerating voltage (31) to the second carbon nanotube; and the difference between the first and second accelerating voltage leads to the energy difference between the first and second x-ray photons.

10. Method of generation of x-rays to study represents the interest of the object, the method contains stages: providing first and second modes (S1); switch between the first and second modes (S2); and the first mode contains the focus of the first of the electrons emitted by the first carbon nanotube on the first substrate, onto the target for the first generation of x-ray photons with the first trajectory; and the second mode contains the focus of the second electrons emitted by the second carbon nanotube on the second substrate, onto the target for the second generation of x-ray photons with the second trajectory; and the focus is set so that the first and the second path is given to the spatial overlap before reaching the interest of the object so that the trajectories of the first and second x-ray photons do not differ from each other.

11. The method according to claim 10, additionally contains the stages: selection of the first accelerating voltage and second accelerating voltage (S3); selection of the switching frequency between the first and second modes (S4); in this case the first accelerating voltage is applied to the first carbon nanotube, and the second accelerating voltage is applied to the second carbon nanotube.

12. Machine-readable media (24)containing instructions that cause a computer to perform the steps of the method according to claim 10 or 11.