An imaging quality testing device for X-ray equipment

Abstract

The present invention discloses an imaging quality testing device for X-ray equipment, which relates to the field of X-ray equipment detection, and includes a substrate for absorbing X-rays to form a test image and a fluorescent body for absorbing X-rays and reflecting visible light, wherein the substrate is provided with a stripe area and the fluorescent body can form an X-ray indication area. In the process of detecting the imaging quality of the X-ray equipment, the present invention can facilitate the compartment to visually observe the X-ray radiation status of the substrate, facilitate the judgment of the abnormal position, and use the test personnel to observe the X-ray indication area, simplify the test operation, improve the accuracy of the test, and the device body has a low cost, which is suitable for the daily self-detection of X-ray equipment by the organization, ensures the operating imaging quality of the X-ray equipment, facilitates the timely discovery of equipment problems, and also facilitates the organization to make self-corrections in advance before third-party detection, thereby improving the overall efficiency of X-ray equipment management.

Description

Technical Field

[0001] The invention relates to the field of X-ray equipment detection, in particular to an imaging quality testing device for X-ray equipment. Background Art

[0002] X-rays, also known as X-rays, have extremely short wavelengths of 0.01-100 angstroms, making them extremely penetrating. Depending on the differences in density and thickness of the material being penetrated, the X-rays are absorbed to different degrees, resulting in different images. Based on this principle, X-rays are widely used in medical diagnosis, luggage inspection, and industrial flaw detection. In particular, in the field of medical diagnosis and treatment, the imaging stability of X-ray equipment is related to the safety of patient diagnosis and treatment. As stipulated in the "Radiological Diagnosis and Treatment Management Regulations", stability testing, correction and maintenance are required to be carried out regularly, and status testing must be carried out regularly by qualified and certified institutions using special testing equipment. For example, the multifunctional non-destructive X-ray machine detector of Sweden's RTI company or the domestic RMP detection phase. In addition to third-party institutions, all institutions that own X-ray equipment also need to conduct regular self-inspections.

[0003] Whether it is a third party or an institution’s self-inspection, an object such as a phantom or a test card is used for X-ray inspection as needed. In the prior art, for example, a test card includes stripe structures of different types of materials and different thicknesses, and several stripe structures are arranged in different position structures. By photographing these devices, the X-ray equipment can intuitively and simply reflect the performance indicators of image quality such as image resolution and MTF curve. Since the X-ray photography equipment mainly includes two core parts, the X-ray generator and the X-ray intensity sensor, when an imaging problem occurs, it is often difficult to determine whether the generator or the sensor has a problem. Due to the invisible characteristics of X-rays, maintenance personnel cannot use phantoms or test cards to find out the crux of the problem. The third-party dedicated detection equipment can detect the X-ray generation quality of the generator and the imaging quality of the sensor for standard intensity X-rays. However, hospitals and other institutions do not have the conditions and are not suitable for configuring these expensive dedicated detection equipment. Therefore, the prior art faces the contradiction between the low effect of institutional self-inspection and the high cost of third-party detection. Summary of the invention

[0004] In order to solve the problems of the above-mentioned prior art, the present invention aims to provide an imaging quality testing device for X-ray equipment, which can utilize a relatively low-cost testing device to facilitate organizations to self-detect the imaging quality of X-ray equipment, and enable the testing device to have the function of discovering the location where imaging quality problems occur, thereby improving the accuracy and stability of imaging quality detection.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] An imaging quality testing device for X-ray equipment includes a device body, wherein the device body includes a substrate for absorbing X-rays to form a test image, the substrate is provided with a stripe area for forming a test pattern, and the device body also includes a fluorescent body for absorbing X-rays and reflecting visible light to show the X-rays projected onto the device body.

[0007] In the above-mentioned imaging quality testing device, preferably, the fluorescent body is set as an indication area, and the indication area includes more than two intensity display blocks. The intensity display blocks are provided with the fluorescent body, and the fluorescent body setting density of each intensity display block is different to form a difference in the intensity of reflected visible light.

[0008] In the imaging quality testing device, further, the intensity display block includes a plurality of fluorescent dots, the fluorescent dots of different intensity display blocks are arranged in the same array, and the sizes of the fluorescent dots of different intensity display blocks are different.

[0009] In the imaging quality testing device, further, the indication area includes two groups of intensity display blocks, and the two groups of intensity display blocks are respectively arranged on two sides of the base.

[0010] In the imaging quality testing device, preferably, the fluorescent body is arranged as an indication area, and the indication area includes a boundary display block, and the boundary display block is formed by the fluorescent body and protrudes from the edge of the substrate.

[0011] The imaging quality testing device described above further comprises at least two boundary display blocks, the two boundary display blocks are arranged oppositely on two sides of the substrate, and the two boundary display blocks are printed with indicating scales.

[0012] In the above-mentioned imaging quality testing device, preferably, the fluorescent body is set as an indication area, and the indication area includes a fluorescent display block, and the fluorescent display block is composed of the fluorescent body and covered on the surface of the substrate. The substrate is also provided with a contrast color card, and the contrast color card is printed with two or more colors corresponding to the visible light reflected by the fluorescent body under different intensities of X-rays, and the contrast color card is set next to the fluorescent display block.

[0013] Preferably, the imaging quality testing device described above further comprises a protective body, wherein the protective body is disposed outside the base body in a wrapped manner, and the fluorescent body is disposed between the base body and the protective body, or outside the protective body.

[0014] In the imaging quality testing device, further, the substrate is made of a plate-like structure of a material that can absorb X-rays, and the fluorescent body is made of a fluorescent material and overlaps or has edges protruding from the substrate.

[0015] The above-mentioned imaging quality testing device is preferably provided with a stripe area on the substrate for forming a test pattern with a thickness or density difference, and the stripe area includes one or a combination of two or more of a parallel arrangement structure, a non-parallel arrangement structure, a vertical arrangement structure and a star arrangement structure composed of a stripe structure, and the stripe area also includes a marking structure, and the marking structure forms marking information by material thickness or density of different materials.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present invention sets a stripe area on the substrate, and its imaging quality can be tested by X-ray equipment. A fluorescent body is set on the substrate, and an indication area is formed by the fluorescent body. During the imaging quality detection process, the tester in the compartment can directly observe the condition of the substrate being irradiated by X-rays from a distance. When an abnormality occurs in the equipment testing process or the test result, the location of the abnormality can be directly determined, whether it is the X-ray generator or the X-ray imager. At the same time, the tester can observe the indication area of ​​the X-ray, which simplifies the test operation and improves the accuracy of the test. The device body has a low cost and is suitable for the organization's daily self-test of X-ray equipment, ensuring the operating imaging quality of the X-ray equipment, facilitating timely discovery of equipment problems, and facilitating the organization to make self-corrections in advance before third-party testing, thereby improving the overall efficiency of X-ray equipment management.

[0018] (2) The present invention further forms an intensity display block that can only display the intensity of X-rays by setting phosphors of different densities, so that testers can intuitively judge the intensity of X-rays and use the intensity to assist in the testing and judgment of imaging quality, thereby completing the detection structure that traditionally requires professional testing equipment to obtain.

[0019] (3) The present invention further provides a boundary display block protruding from the edge of the substrate to completely cover the X-ray irradiation area, thereby facilitating the operator to control the X-ray generator and accurately align the X-ray generator and focus on the device body for shooting.

[0020] (4) The present invention further provides a fluorescent display block to display the presence or absence of X-rays at a distance, and assists in judging the intensity of X-rays by comparing with color cards, thereby prompting and irradiating test personnel for test operations.

[0021] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the first embodiment of the testing device of the present invention;

[0023] Figure 2It is a partial cross-sectional side structural schematic diagram of the first embodiment of the testing device of the present invention;

[0024] Figure 3 It is a schematic diagram of the main structure of the second embodiment of the testing device of the present invention;

[0025] Figure 4 It is a partial intuitive schematic diagram of the second embodiment of the present invention in a low-intensity X-ray radiation state;

[0026] Figure 5 It is a partial intuitive schematic diagram of the second embodiment of the present invention in a medium-intensity X-ray radiation state;

[0027] Figure 6 It is a partial intuitive schematic diagram of the second embodiment of the present invention in a high-intensity X-ray radiation state;

[0028] Figure 7 It is a partial intuitive schematic diagram of the X-ray boundary display state of the second embodiment of the present invention.

[0029] The reference numerals in the drawings are: 100, substrate; 200, phosphor; 300, protective body; 1, stripe area; 11, stripe structure; 2, marking structure; 2, indication area; 21, intensity display block; 211, phosphor point; 22, boundary display block; 221, indication scale; 23, phosphor display block; 231, contrast color card. DETAILED DESCRIPTION

[0030] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] refer to Figures 1 to 2, is an imaging quality testing device for X-ray equipment according to the first embodiment of the present invention with a relatively simple structure, which can be used for the object photographed by the X-ray equipment to obtain an image for verifying the imaging quality, and can intuitively judge the X-ray projection status of the device body during the test, and includes a substrate 100 and a fluorescent body 200. Among them, the substrate 100 is composed of a plate-shaped metal lead with uniform thickness, and a stripe area 1 for a test pattern is arranged on the substrate 100. The stripe area 1 is composed of a plurality of stripe structures 11 arranged, and the stripe structure 11 can be photographed by the X-ray device to produce a test image. The stripe structure 11 is composed of a metal lead with a different thickness from the substrate, or another metal such as metal tungsten. In the schematic scheme, the metal lead and tungsten can be used as materials for absorbing X-rays and forming a test image; the fluorescent body 200 is composed of a fluorescent material for showing an indication area 2 of the X-rays projected on the device body. Among them, the indication area 2 includes an intensity display block 21, a boundary display block 22 and a fluorescent display block 23. More specifically, there are more than two intensity display blocks 21, and the density of the fluorescent body 200 set in each intensity display block 21 is different, and each intensity display block 21 is arranged adjacent to each other; two boundary display blocks 22 are symmetrically arranged protruding from the edge of the substrate 100, which protrude outward to increase the size of the substrate 100 and are provided with fluorescent bodies 200 that display the diameter and position of the X-ray projection; the fluorescent display block 23 covers the fluorescent body 200 on the surface of the substrate 100, which can show the radiation state of the X-ray at a distance, and is provided with a contrast color card 231 to preliminarily judge the X-ray radiation intensity. Figure 2 The substrate 100 is a plate-like structure, the stripe structure 11 is embedded in the substrate 100, the protective body 300 is an organic glass or methacrylic resin plate, wrapped on the upper and lower surfaces of the substrate 100, and the fluorescent body 200 is bonded to the outside of the surface protective body 300 to form the indication area 2; the fluorescent body 200 is formed by phosphor, barium platinum cyanide, cadmium zinc sulfide, calcium tungstate and other fluorescent materials attached to paper and other materials. In this embodiment, the fluorescent body 200 is arranged in the outermost layer to reduce interference. In other embodiments, it can also be arranged between the protective body 300 and the substrate 100.

[0032] refer to Figures 3 to 7 , is an imaging quality test device for X-ray equipment according to the second embodiment of the present invention with more comprehensive functions, similar to the first embodiment, which includes a substrate 100 for absorbing X-rays to form a test image, and a fluorescent body 200 for absorbing X-rays and reflecting visible light; the substrate 100 is provided with a stripe area 1 for forming a test pattern with the same material thickness or different material density, and the fluorescent body 200 is composed of fluorescent material for showing an indication area 2 of X-rays projected on the device body. Among them, the indication area 2 includes an intensity display block 21, a boundary display block 22 and a fluorescent display block 23.

[0033] refer to Figure 3More specifically, in the second embodiment, in terms of the intensity display blocks 21, the indication area 2 includes two groups of intensity display blocks 21, and the two groups of intensity display blocks 21 are respectively arranged on the left and right sides of the substrate 100, so that the tester can observe from multiple angles; each group of intensity display blocks 21 includes three intensity display blocks 21, and the areas of the fluorescent bodies 200 of the intensity display blocks 21 are different to form a difference in the intensity of reflected visible light. Specifically, in this embodiment, the intensity display blocks 21 include a plurality of circular fluorescent dots 211, and in one group of intensity display blocks 21, the fluorescent dots 211 of each intensity display block 21 are arranged in the same array of 4*4 in horizontal and vertical directions, the diameter of the fluorescent dots 211 of the upper intensity display block 21 is smaller, the diameter of the fluorescent dots 211 of the middle intensity display block 21 is medium, and the diameter of the fluorescent dots 211 of the lower intensity display block 21 is the largest. As for the boundary display blocks 22, there are two of them, which are arranged at the edge of the substrate 100 and protrude outward, and are connected to the phosphor 200, and the phosphor 200 is printed with an indication scale 221; as for the fluorescent display block 23, there are two of them symmetrically arranged, specifically a circular structure covered by the phosphor 200, next to which a contrast color card 231 is arranged, and the contrast color card 231 is printed with three colors corresponding to the visible light reflected by the phosphor 200 under different intensities of X-rays for comparison reference.

[0034] refer to Figure 3 , the stripe region 1 includes a plurality of groups of stripe structures 11, each group of which is composed of linear stripe structures 11 of a set width arranged in parallel with each other at a set distance. The plurality of groups of stripe structures 11 can be photographed by an X-ray device to form an image, and the resolution of the X-ray device can be obtained according to which group of stripe structures 11 the photographed image can be clearly restored to. More specifically, the substrate 100 is provided with a marking structure 12, and the marking structure 12 is marking information formed by the protrusion of metal lead, wherein the marking information includes the line pair parameters of the stripe structure 11, such as 0.6 to 5.0, and also includes the material thickness of the substrate, such as 0.1mmPb, etc. The marking structure 12 can be photographed and recorded by an X-ray device. In other embodiments, the stripe region 1 can also be a combination of one or more of a non-parallel arrangement structure, a vertical arrangement structure and a star arrangement structure composed of the stripe structures 11; the stripe structure 11 can also be a curve, or a gradual width change.

[0035] The method of using the second embodiment of the present invention is as follows. The first embodiment can be operated similarly:

[0036] (1) Place the test card at the test position, ensuring that the center of the X-ray beam passes through the center of the test card, such as by sticking the test card onto the image intensifier;

[0037] (2) Adjust the focal length of the X-ray generator in sequence, such as FFD = 80-100 cm; adjust the tube voltage of the X-ray generator in sequence, such as tube voltage = 50-70 KVp.

[0038] (3) Adjust the X-ray machine so that the center line of the tube is directly above the test card;

[0039] (4) Adjust mAs so that the total X-ray optical density value is about 1.5. Generally, the image formed by the test card on the monitor is the clearest, that is, the line pairs and the blank area can be clearly distinguished. Observe the number of line pairs that can be distinguished at this time. This number is the resolution of the X-ray system.

[0040] (5) Additional test: Place a material equivalent to the human body on the test card to test the resolution when the X-ray machine's X-rays simulate passing through the human body and the X-rays are attenuated.

[0041] refer to Figure 7 When adjusting the focal length and position of the X-ray generator, the tester sits in the compartment to operate, control and move the X-ray generator, and the X-ray will show visible light on the fluorescent body 200 of the boundary display block 22. The operator will observe the area difference of the fluorescent area of ​​the left and right boundary display blocks 22, and know that the boundary of the X-ray is not centered, and can be re-centered by controlling the movement of the X-ray generator. The operator can observe whether the fluorescent area of ​​the left and right boundary display blocks 22 is too large or too small, which helps to judge whether the focal length is reasonable.

[0042] refer to Figures 4 to 6 When shooting and testing the image quality, the tester can sit in the compartment to operate and observe from a distance whether the fluorescent display block 23 produces fluorescence. The intensity of the X-ray is preliminarily judged based on the fluorescent color and the printed color on the contrast color card 231. When the X-ray device does not capture an image and the fluorescent display block 23 does not show fluorescence, the operator can judge that there is a problem with the X-ray generator. When the X-ray device does not capture an image, but the fluorescent display block 23 shows fluorescence, the operator can judge that there is a problem with the X-ray imager. Based on this understanding, the operator can perform further debugging and maintenance.

[0043] refer to Figures 4 to 6 When the tester sits in the compartment and operates, he switches the tube voltage of the X-ray generator to output at 50, 60 and 70KVp and test its imaging quality. Figure 4 The state is that the lower intensity display block 21 shows fluorescence, while the middle and upper intensity display blocks 21 do not show clear fluorescence, which means that the current tube voltage is a lower 50KVp and is consistent with the operating setting; when the tester observes Figure 5 The state is that the lower and middle intensity display blocks 21 show fluorescence, while the upper intensity display block 21 does not show clear fluorescence, which means that the current tube voltage is a lower 60KVp and is consistent with the operating setting; when the tester observes Figure 6 The state of the X-ray generator can be judged by the intensity display blocks 21 in the upper, middle and lower parts, that is, the intensity display blocks 21 in the upper, middle and lower parts all show fluorescence, which means that the current tube voltage is a relatively low 70KVp, which is consistent with the operation setting. This can be used to judge whether the intensity of the X-ray generator corresponds to the setting, and can also be further combined with the image resolution obtained by each test to judge the overall quality of the X-ray equipment.

[0044] The above embodiments mainly describe the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An imaging quality testing device for an X-ray device, comprising a device body, characterized in that: The device body comprises a substrate (100) for absorbing X-rays to form a test image, the substrate (100) being provided with a stripe region (1) for forming a test pattern, and the device body further comprises a fluorescent body (200) for absorbing X-rays and reflecting visible light to show the X-rays projected onto the device body; The fluorescent body (200) is arranged as an indication area (2), the indication area (2) comprises more than two intensity display blocks (21), the intensity display blocks (21) are provided with the fluorescent body (200), and the fluorescent body (200) of each intensity display block (21) is arranged at a different density to form a difference in intensity of reflected visible light; The fluorescent body (200) is arranged as an indication area (2), the indication area (2) comprises a boundary display block (22), the boundary display block (22) is formed by the fluorescent body (200) and protrudes from the edge of the base body (100); The device body further comprises a protective body (300), wherein the protective body (300) is arranged outside the base body (100) in a wrapped manner, and the fluorescent body (200) is arranged between the base body (100) and the protective body (300), or arranged outside the protective body (300); the base body (100) is made of a material that can absorb X-rays to form a plate-like structure, and the fluorescent body (200) is made of a fluorescent material and overlaps or has its edges protruding from the base body (100).

2. The imaging quality testing device for X-ray equipment according to claim 1, characterized in that: The intensity display block (21) comprises a plurality of fluorescent dots (211), the fluorescent dots (211) of different intensity display blocks (21) are arranged in the same array, and the fluorescent dots (211) of different intensity display blocks (21) have different sizes.

3. The imaging quality testing device for X-ray equipment according to claim 1, characterized in that: The indication area (2) comprises two groups of strength display blocks (21), and the two groups of strength display blocks (21) are respectively arranged on two sides of the base body (100).

4. The imaging quality testing device for X-ray equipment according to claim 1, characterized in that: At least two of the boundary display blocks (22) are provided, and the two boundary display blocks (22) are arranged oppositely on two sides of the base body (100), and the two boundary display blocks (22) are printed with indicating scales (221).

5. The imaging quality testing device for X-ray equipment according to claim 1, characterized in that: The fluorescent body (200) is arranged as an indication area (2), the indication area (2) comprises a fluorescent display block (23), the fluorescent display block (23) is composed of the fluorescent body (200) and covers the surface of the substrate (100), the substrate (100) is further provided with a contrast color card (231), the contrast color card (231) is printed with two or more colors corresponding to the visible light reflected by the fluorescent body (200) under X-rays of different intensities, and the contrast color card (231) is arranged beside the fluorescent display block (23).

6. The imaging quality testing device for X-ray equipment according to any one of claims 1 to 5, characterized in that: The substrate (100) is provided with a stripe region (1) for forming a test pattern with a thickness or density difference, the stripe region (1) comprising one or a combination of two or more of a parallel arrangement structure, a non-parallel arrangement structure, a vertical arrangement structure and a star arrangement structure formed by a stripe structure (11), the stripe region (1) also comprising a marking structure (12), the marking structure (12) forming marking information with material thickness or different material density.

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