X-ray source module
FIELD: roentgen engineering; producing roentgenograms, for instance in medicine.
SUBSTANCE: proposed X-ray source module has X-ray tube incorporating body, cathode and anode assemblies, as well as generator unit incorporating high-rating voltage divider whose high-voltage lead is connected to one of tube assemblies; X-ray tube body is made in the form of metal cylinder accommodating sectionalized cylindrical high-voltage insulator. One of its ends is connected through vacuum-tight joint to one of body ends and other end mounts cathode assembly. Anode assembly is disposed on other end of body and is made in the form of anode tube brought outside the body that carries target on its loose end. Generator unit is disposed inside cylindrical high-voltage insulator whose inner space is filled with oil. Side surface of insulator functions as high-rating voltage divider.
EFFECT: reduced mass and size of module.
1 cl, 1 dwg
The invention relates to rechentechnik and can be used in the development of x-ray apparatus used, for example, for diagnostics in medicine.
Currently, due to a number of advantages that are increasingly portable x-ray units, made in monoblock.
Closest to the claimed technical solution is to design monoblock portable x-ray machine L (Rechentechnik. Handbook / edited VLV, book 1. - M.: Mashinostroenie, 1989, s, 29).
Monoblock consists of a housing, inside which is placed the x-ray tube, the generator device with the high-voltage divider, four compensating temperature changes in the volume of transformer oil. On the inner surface of the monoblock fixed lead protection from an unused x-ray radiation. X-ray tube contains a glass case, as well as cathodic and anodic sites. The high-voltage generator output device connected to one of the nodes of the x-ray tube. The internal volume of the shell of the candy bar filled with oil, which ensures a dielectric strength of structural elements and the heat sink. In the monoblock case there is an output window for the release of the working beam x-ray) the treatment, and a connector for supplying low voltage power to the emitter.
Since nodes are placed inside a candy bar, for example, x-ray tube, high-voltage divider, have their own housing and are connected to additional lines, this candy bar has a large size and weight. The increase in size leads to the increase of oil volume, the extension of which when heated in the process must be compensated by means of special joints, additionally increases the volume of the candy bar. Accordingly, the increased size and weight of the lead coating enclosure used to protect from an unused x-ray, which also increases the weight of the candy bar.
The technical result of the invention consists in reducing the weight of the monoblock and the reduction of its size.
To achieve the technical result in the monoblock x-ray source containing the x-ray tube, consisting of a body, the cathode and anode assemblies, as well as generating device with high-voltage divider, high voltage output of which is connected to the cathode node, the case of x-ray tube made in the form of a metal cylinder. Inside the cylinder is partitioned cylindrical high voltage insulator, and one end of soybeans is inen vacuum-tight with one of the ends of the housing, and on the other end installed cathodic site. The anode node is located at the other end of the body and is made in the form of the anode tube, the free end of which is fixed a target that can be output window. On the anode tube tightly planted with a lead pipe. Generating device placed inside the high voltage cylindrical insulator, the internal volume of which is filled with oil, and the side surface of the insulator plays the role of a high-voltage voltage divider.
The essence of the claimed invention consists, first, in carrying metal parts of the housing of the x-ray tube so that he began to perform the role of housing the entire piece, and the dielectric part of the role of high-voltage voltage divider generating device, and rendering the anode node outside of the body, and, secondly, the location of the generating device inside the high voltage cylindrical insulator, which generally helps to make the design of monoblock most lightweight, compact and reliable.
The use of cylindrical insulator in high voltage divider voltage generator device allows to exclude from the design of monoblock series of large parts, such as resistors high voltage of the voltage divider elements and their mounting. Slightly the e amount of oil, which fills the remaining volume of the cylindrical high voltage insulator, does not require the use of large joints, which, in turn, also reduces the weight and dimensions of monoblock.
Because the target is outside of the piece with the help of the anode tubes for protection from an unused x-ray radiation is sufficient to cover the lead only its outer surface, which will further significantly reduce the weight of the candy bar.
The essence of the invention is illustrated in the drawing, which presents the design of the piece.
Monoblock x-ray source includes an x-ray tube 1 consisting of a body 2 made in the form of a cylinder, and a generating device 6. Inside the housing 2 is cylindrical high voltage insulator 3, one end of which is connected vacuum-tight to one of the ends of the housing 2, and on the other end is cathode Assembly 5 which by means of a collet connector 4 is connected to the generating device 6 placed inside the high voltage cylindrical insulator 3. A cylindrical insulator consists of two sections of different length. The length of the section 11, is connected to the cathode node is not less than 100 times the length of section 12 connected to the body tube. The anode unit is designed in the form of the anode of the tube 7, to free the end of which is fixed a target of 8 massive or " through " type, and located at the other end of the body 2, the outer surface of the anode pipe covered with a layer of lead cylindrical shape 9. On the opposite end of the body 2 has a connector for supplying low-voltage power supply block.
When the monoblock low voltage AC voltage is applied to the generator device 6 through the connector 10. Generating unit 6 generates a constant high voltage of negative polarity relative to the body 1 monoblock. Under the influence of high voltage insulator 3 is charged and on its surface there is a potential the magnitude of which is determined by the length of each section. The length ratio of, for example, 100 to 1, the output voltage of the generator device 6 will be divided by 100 to 1. Depending on the output voltage signal produced by a "short" section of the insulator is from several hundred volts to units of kilovolts and directly used to monitor and control the operation of the monoblock. The electrons, which are emitted by cathode node 4 are accelerated into the target anode 8 of the node.
Since electrons are decelerated in the target 8, which is located outside the chassis monoblock 2, the protection from an unused x-ray radiation is placed only on a small area of the anode tube, and not over the whole body candy bar.
N the working beam 13, directed at an angle αequal to 90 degrees, to the axis of the tube will be absorbed lead pipe 9 and the structural elements of the piece, for example generating device.
For best results, the case of x-ray tube is made of stainless steel, high-voltage cylindrical insulator is made of ceramic, the output feedback voltage from the low voltage arm of the divider copper.
Thus, the claimed design, in contrast to the known can significantly reduce the weight and dimensions of monoblock, which will greatly facilitate its use in portable x-ray machines.
Monoblock x-ray source containing the x-ray tube, consisting of a body, the cathode and anode assemblies, as well as generating device with high-voltage divider, high voltage output of which is connected to one of the nodes of the tube, characterized in that the housing of the x-ray tube made in the form of a metal cylinder, inside of which is a two-piece cylindrical high voltage insulator, while its one end is connected vacuum-tight to one of the ends of the housing and at the other end of the installed cathodic site, and the length of the section, on which is mounted a cathode Assembly, not less than 100 times the length of the section, with whom United with the end of the body, the anode node, in turn, is located at the other end of the body and is made in the form outside the body of the anode tube, the free end of which is fixed target, while generating device placed inside the high voltage cylindrical insulator, the internal volume of which is filled with oil, and the side surface of the insulator plays the role of a high-voltage voltage divider.
FIELD: mechanical engineering; radiation method of inspection of materials and items.
SUBSTANCE: centering mount has housing inside which the laser is disposed as well as first reflector mounted onto axis of laser in front of exit window of X-ray radiator is the point where axis of laser crosses axis of X-ray beam, second reflector mounted onto axis of laser outside the projection of exit window of X-ray reflector for rotation relatively axis being perpendicular to plane formed by axes of laser beam and X-ray. Device also has aids for indicating focal length made in form of pointer provided with scale fixed onto housing of centering mount. Flat collimated laser beam forming system is mounted in front of laser. Laser beam propagates along plane being parallel to vertical plane crossing longitudinal axis of X-ray radiator. The axis is at the same time perpendicular to vertical plane crossing axis of X-ray beam. The second reflector is mounted at the exit of system at laser axis. Beam splitter is mounted between first and second reflectors. In front of the beam splitter there is the second semiconductor laser which is mounted onto axis being perpendicular to axis of laser to cross its point of crossing with beam splitter.
EFFECT: improved precision of measurements; simplified application.
FIELD: flaw inspections, customs examination equipment, medicine, and roentgen diagnosing spectroscopic installations.
SUBSTANCE: proposed X-ray tube has vacuum envelope accommodating anode, X-ray output aperture, cathode assembly incorporating field-radiating cathode in the form of bundle of carbon fibers placed in conducting or semiconducting shell, contact assembly of field-radiating cathode, and cap that functions as control electrode. In order to prevent stray surface electric conductance caused by sputtering of field-radiating cathode material on structural components of X-ray tube, dielectric washer is inserted in this tube wherein during X-ray tube assembly annular cavity is formed between inner hole of washer, field-radiating cathode shell, and upper end of field-radiating cathode contact assembly. Cavity provided in dielectric washer and also its slots prevent formation of solid conducting and semiconducting films which enhances stability of electrical and radiating characteristics of tube. For raising electric strength of tube and excluding breakdown of its envelope cap is installed on dielectric washer that functions as control electrode. Cap is installed so that axis of carbon fiber bundle is aligned with that of optoelectronic system of X-ray tube and symmetry axis of cap.
EFFECT: enhanced operating stability, electric strength, reliability, and service life of X-ray tubes with field-radiating cathode.
1 cl, 3 dwg
SUBSTANCE: method involves carrying out KNEE JOINT COMPUTER TOMOGRAPHY examination. Scanning levels are determined tomogram. Proximal one goes upward to 1.5 cm far from the patella. Distal one is at the level of tibial tuberosity. A tomogram is superimposed at the level of the central portions of the patellar bed and a tomogram is superimposed at the level of proper patellar ligament insertion site. Angle is measured on the produced image. The angle is formed by two lines one being straight line drawn over the patella bed center and femur center and the other one being drawn over tibia center and proper patellar ligament insertion site.
EFFECT: high accuracy in determining patella and its proper ligament distortion angle.
SUBSTANCE: method involves measuring main pulmonary artery diameter. Chest diameter is additionally measured at the level the examination is carried out. Vasculothoracic index VTI1 is calculated as ratio of transverse chest diameter at the level of the main pulmonary artery to main pulmonary artery diameter. VTI2 is also calculated as ratio of transverse chest diameter at the level of pulmonary artery bifurcation to main pulmonary artery diameter at given level. Mean VTI is calculated as (VTI1+ VTI2)/2. Mean VTI value being equal to 6.9-9.4, moderate pulmonary hypertension severity is considered to be the case. The value being less than 6.8, apparent pulmonary hypertension is considered to be the case.
EFFECT: high accuracy of diagnosis.
FIELD: biology; medicine.
SUBSTANCE: device can be used for diagnosing state of internal organs. Device has narrow discontinuous radiation beam former with sweep, radiation detector, synchronization unit, drive, master oscillator, counter, analog-to-digital converter, processor and monitor. Radiation detector is made in form of M identical layers disposed one after another in the direction of radiation propagation. Any layer is made in form of N isolated parallel linear arrays; each of each consists of K pin-diodes connected in parallel, back-biased and disposed in one line along line of sweep of the beam. All M linear arrays being disposed layer by layer and having similar order numbers are connected to each other and to information inputs of analog-to-digital converter. Count input of counter is connected with output of master oscillator. Control input of the counter is connected with output of sweep radiation beam former. Output of pulse counter is connected with the second information input of processor. Clock output of counter is connected with control inputs of analog-to-digital converter. Radiation detector is used which detector has high efficiency of X-ray radiation energy conversion to electric signal. Design of the detector proposed allows using counter which provide simple determination of spatial location of read-out image element (pixel) and its correspondence to definite area (zone) of object to be diagnosed.
EFFECT: reduced dosage load; increased speed of operation when reading information out.
FIELD: medicine, cardiology.
SUBSTANCE: the present innovation deals with positron emission tomography (PET) to perform it with 18F-fluorooxyglucose (18F-FDG), moreover, at detecting myocardial viability in patients with disorders in carbohydrate exchange one should pre-introduce perorally trimetasidine thrice daily at the dosage of 20 mg for 8-12 d, 1 d before the onset of PET-trial it is necessary to exclude caffeine-containing products out of patient's diet and medicinal preparations and at 18F-FDG in myocardium being 50% and more against its maximal accumulation it is possible to diagnose viable myocardium, if below 50% - nonviable myocardium.
EFFECT: higher efficiency and accuracy of diagnostics.
8 dwg, 2 ex