Detection structure for diagnosing X-ray multi-parameter measurement

Abstract

The utility model relates to the technical field of X-ray parameter measurement equipment, and particularly discloses a detection structure for diagnosing X-ray multi-parameter measurement. The first filter disc is arranged at the upper section of the left part in the shell; the second filter disc is arranged at the upper section of the right part in the shell; the detectors comprise a first detector, a second detector, a third detector, a fourth detector, a fifth detector and a sixth detector which are respectively used for measuring different parameters of X rays; the first shielding structure is arranged between the first detector and the third detector; the second shielding structure is arranged between the third detector and the fifth detector. The circuit board extends into the shell from the left part of the shell, and the first detector and the second detector, the third detector and the fourth detector, and the fifth detector and the sixth detector are sequentially separated by the middle section of the circuit board. According to the utility model, the plurality of detectors are arranged to form the detection group, and errors are calculated and eliminated through an X-ray attenuation curve, so that the influence of a heel effect is solved, and the measurement accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of X-ray parameter measurement equipment, in particular to a detection structure used for diagnosing X-ray multi-parameter measurement. Background Art

[0002] Radiodiagnosis refers to the use of X-rays and radionuclide gamma rays to penetrate the human body, so that the internal structures and organs of the human body can be displayed on the fluorescent screen or film, so as to understand the morphological structure, physiological function and pathological changes of the human body. Radiodiagnosis devices mainly include CR and DR, CT, breast machine, dental film machine, DSA, PET / CT and SPECT. In radiation physics, tube voltage is usually represented by KV, which represents the penetration of X-rays. The larger the tube voltage, the stronger the penetration. In imaging, the larger the KV value, the greater the contrast of the image, the stronger the graininess, and the more noise. In other words, KV is related to contrast. X-rays can diagnose patients' conditions, but they can also kill normal tissue cells. Therefore, non-invasive instruments must be used in diagnostic X-ray quality control to measure multiple parameters of diagnostic X-rays (tube voltage, dose, dose rate, exposure time and half-value layer, etc.).

[0003] Reflective X-ray tubes are widely used in medical diagnosis and other fields, but a major disadvantage of this type of tube is the heel effect. The heel effect refers to the X-ray intensity near the anode target metal end of the X-ray tube in the axial direction of the X-ray tube beam exit window being significantly lower than the X-ray intensity at the cathode end of the X-ray tube. The reason is that the anode metal target surface is not perpendicular to the high-energy electrons. When the high-energy electrons hit the target metal, the high-energy electrons interact with the target metal to produce bremsstrahlung radiation, generating X-ray photons. When the photons are emitted from the target surface, the target metal near the anode end is thicker and has a stronger attenuation effect on the photons, while the target metal near the cathode end is thinner and has a weaker attenuation effect on the photons. Because the thickness of the target metal is gradually transitioned, the intensity of the output photons is also gradually transitioned from strong to weak from close to the cathode end to close to the anode end.

[0004] In the prior art, a planar detector filtering method is generally used, that is, filters of different thicknesses are attached to different detectors on the same plane, the intensity of the rays attenuated by filters of different thicknesses is measured, the tube voltage is calculated through a certain algorithm, and other measured values ​​such as dose, dose rate, and half-layer value are corrected according to the tube voltage. However, during the measurement process, if the strip direction of the detector is difficult to ensure parallelism with the anode-cathode direction of the X-ray tube, the plane incident ray intensity is different due to the heel effect, which causes a large error in the tube voltage measurement. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a detection structure for diagnosing X-ray multi-parameter measurement, solve the heel effect in the measurement process, and obtain an accurate tube voltage value.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a detection structure for diagnosing X-ray multi-parameter measurement, including a housing, a filter, a detector, a shielding structure and a circuit board;

[0007] The filter comprises a first filter and a second filter; the first filter is arranged in the upper left section of the housing; the second filter is arranged in the upper right section of the housing;

[0008] The detectors include a first detector, a second detector, a third detector, a fourth detector, a fifth detector and a sixth detector, which are respectively used to measure different parameters of the X-rays; the first detector is arranged in the left middle section of the housing; the second detector is arranged in the left lower section of the housing; the third detector is arranged in the middle middle section of the housing; the fourth detector is arranged in the middle lower section of the housing; the fifth detector is arranged in the right middle section of the housing; and the sixth detector is arranged in the right lower section of the housing;

[0009] The shielding structure comprises a first shielding structure and a second shielding structure; the first shielding structure is arranged between the first detector and the third detector; the second shielding structure is arranged between the third detector and the fifth detector;

[0010] The circuit board extends from the left part of the shell into the shell and extends from the right wall of the shell. The middle section of the circuit board sequentially separates the first detector and the second detector, the third detector and the fourth detector, and the fifth detector and the sixth detector.

[0011] As a further technical solution of the above solution, a copper layer is provided in the middle layer of the circuit board.

[0012] As a further technical solution of the above solution, the copper layer is set to an even number of layers, and the filtering thickness is changed according to the measurement requirements.

[0013] Compared with the prior art, the utility model has the following advantages and beneficial effects: the utility model forms a detection group by arranging multiple detectors, and the tube voltage measured by each detection group is calculated by eliminating the error through the X-ray attenuation curve, thereby solving the influence of the heel effect and improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 A schematic diagram of the circuit board structure.

[0016] The meanings of the numbers in the figure are: housing-1; first filter-21; second filter-22; first detector-31; second detector-32; third detector-33; fourth detector-34; fifth detector-35; sixth detector-36; first shielding structure-41; second shielding structure-42; circuit board-5; copper layer-6. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings in the embodiments of the utility model, so as to have a further understanding of the concept of the utility model, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0018] like Figure 1 and Figure 2 As shown, a detection structure for diagnostic X-ray multi-parameter measurement includes a housing 1, a filter, a detector and a shielding structure;

[0019] The filter includes a first filter 21 and a second filter 22; the first filter 21 is arranged in the upper left section of the housing 1; the second filter 21 is arranged in the upper right section of the housing 1;

[0020] The detectors include a first detector 31, a second detector 32, a third detector 33, a fourth detector 34, a fifth detector 35 and a sixth detector 36, which are respectively used to measure different parameters of the X-rays; the first detector 31 is arranged in the left middle section of the housing 1; the second detector 32 is arranged in the left lower section of the housing 1; the third detector 33 is arranged in the middle middle section of the housing 1; the fourth detector 34 is arranged in the middle lower section of the housing 1; the fifth detector 35 is arranged in the right middle section of the housing 1; and the sixth detector 36 is arranged in the right lower section of the housing 1;

[0021] The shielding structure includes a first shielding structure 41 and a second shielding structure 42; the first shielding structure 41 is disposed between the first detector 31 and the third detector 33; the second shielding structure 42 is disposed between the third detector 33 and the fifth detector 35;

[0022] The circuit board 5 extends into the housing 1 from the left part and extends out from the right wall of the housing 1. The middle section of the circuit board 5 sequentially separates the first detector 31 and the second detector 32, the third detector 33 and the fourth detector 34, the fifth detector 35 and the sixth detector 36.

[0023] When using the device, the first detector 31, the second detector 32, the third detector 33, the fourth detector 34, the fifth detector 35 and the sixth detector 36 are respectively arranged at corresponding positions in the shell 1; when using radiation irradiation, it first passes through the first filter 21 and the second filter 22 and then reaches the first detector 31, the second detector 32, the third detector 33, the fourth detector 34, the fifth detector 35 and the sixth detector 36; the first detector 31 and the second detector 32, the third detector 33 and the fourth detector 34, the fifth detector 35 and the sixth detector 36 are all penetrated by the same beam of radiation emitted by the X-ray tube, forming three detector pairs, and the current signals detected by the detectors can obtain three ratios after conversion and amplification. The ratios are calculated by the diagnostic X-ray multi-parameter deep learning model to obtain parameters such as tube voltage, dose rate, dose and half-value layer. In the prior art, a planar detector is used for comparison. The received X-ray filtering is inconsistent. The inconsistent filtering is caused by the position. This error cannot be eliminated by calculating the X-ray attenuation curve. After using this device, since the upper and lower detectors have the same incident ray, although the energy of the ray also changes with the position, the error of the change can be calculated and eliminated by the known X-ray attenuation curve. Specifically, the tube voltage of the same X-ray is obtained by inverting the position of the X-ray attenuation curve according to the difference in filter thickness. In the measurement of the three groups, the first filter 21 and the second filter 22 are set to different thicknesses for measuring different parameters, and no filter is set in front of the third detector 33 and the fourth detector 34 for measuring the dose of the ray. In this device, the shielding structure has two main functions. The detector is sensitive to light, and the first shielding structure 41 and the second shielding structure 42 can be used to avoid light; the second is to shield electromagnetic interference. The model detected by the detector is very weak and is easily affected by electromagnetic interference.

[0024] like Figure 2 The middle layer of the circuit board 5 is provided with a copper layer 6. The copper layer 6 is provided in the middle layer of the circuit board 5 as a filter plate.

[0025] like Figure 2 As shown, the copper layer 6 is set to an even number of layers, and the filter thickness is changed according to the measurement requirements. The X-ray energy is related to the tube voltage. For example, the tube voltage of ordinary chest X-rays in hospitals is generally (50~150) kV, while the tube voltage of breast diagnosis is (20~49) kV, which is relatively low energy. Different energies require different filter thicknesses. If the filter is thick, low energy rays are completely blocked. If the filter is thin, high energy rays are almost unchanged, so filters of different thicknesses are required. Therefore, the circuit board 5 can be free of copper layer 6, or multiple copper layers 6 can be added to change the filter thickness to adapt to rays of different energies.

[0026] The words “connection” and “fixation” appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0027] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have, and therefore cannot be understood as a limitation on the present invention.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A detection structure for diagnostic X-ray multi-parameter measurement, characterized in that: It comprises a housing (1), a filter, a detector, a shielding structure and a circuit board; The filter comprises a first filter (21) and a second filter (22); the first filter (21) is arranged at the upper left section of the housing (1); and the second filter (22) is arranged at the upper right section of the housing (1); The detectors include a first detector (31), a second detector (32), a third detector (33), a fourth detector (34), a fifth detector (35) and a sixth detector (36), which are respectively used to measure different parameters of X-rays; the first detector (31) is arranged in the left middle section of the housing (1); the second detector (32) is arranged in the left lower section of the housing (1); the third detector (33) is arranged in the middle middle section of the housing (1); the fourth detector (34) is arranged in the middle lower section of the housing (1); and the fifth detector (35) is arranged in the right middle section of the housing (1); The sixth detector (36) is arranged in the lower right section of the housing (1); A shielding structure, comprising a first shielding structure (41) and a second shielding structure (42); the first shielding structure (41) is arranged between the first detector (31) and the third detector (33); the second shielding structure (42) is arranged between the third detector (33) and the fifth detector (35); The circuit board (5) extends from the left portion of the housing (1) into the housing (1) and extends from the right wall of the housing (1). The middle section of the circuit board (5) sequentially separates the first detector (31) and the second detector (32), the third detector (33) and the fourth detector (34), the fifth detector (35) and the sixth detector (36).

2. A detection structure for diagnostic X-ray multi-parameter measurement according to claim 1, characterized in that: A copper layer (6) is provided on the middle layer of the circuit board (5).

3. A detection structure for diagnostic X-ray multi-parameter measurement as claimed in claim 2, characterized in that: The copper layer (6) is set as an even number of layers, and the thickness of the filter is changed according to the measurement requirements.

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