CN107080552B - A phantom for testing the imaging quality of various medical X-ray equipment and its system and method - Google Patents

Abstract

The invention discloses a phantom for testing imaging quality of various medical X-ray equipment, a system and a method thereof, wherein the phantom comprises two cube substrates, a reference module, a mammography module, a common radiography module and a computer tomography module are arranged on the cube substrates, and the reference module comprises a sphere and four metal bars; the mammography module comprises six cubes, seven metal balls and eight lines; the common X-ray photography module comprises twelve cylinders and six metal wire modules; the computer tomography module comprises six cylinders and a cylinder; the system comprises a gray level analysis, a spatial resolution analysis, a positioning and deformation analysis, a contrast analysis, a latitude analysis, a geometric distortion analysis and an active selection ROI analysis module. The invention can test the spatial resolution, contrast, linearity, geometric distortion, magnification, modulation transfer function and Z-axis spatial resolution of analog X-ray imaging, digital X-ray imaging, mammary X-ray imaging and CT imaging.

Description

A phantom for testing the imaging quality of various medical X-ray equipment and its system and method

technical field

The invention belongs to the field of model moulds, in particular to a phantom for testing the imaging quality of various medical X-ray equipment, a system and a method thereof.

Background technique

With the development of society, X-ray equipment is becoming more and more popular, which provides a guarantee for the development of medical care. However, the method of using X-ray imaging to diagnose diseases depends on the image quality, and the maintenance of image quality requires quality assurance and quality inspection of various X-ray modalities.

At present, specific phantoms of multiple modalities used to perform quality assurance (QA) tests are expensive, and require specially trained personnel to perform corresponding operations to obtain image quality test results, which cannot achieve the purpose of testing multiple modal X-rays with one phantom.

To sum up, in order to make it easier to test the quality of X-ray imaging of various modalities, how to design a phantom for testing the imaging quality of various X-ray equipment with high detection accuracy and independent of subjective judgment is still a technical problem to be solved.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a phantom for testing the imaging quality of various medical X-ray equipment and its system and method.

The technical scheme adopted in the present invention is:

A phantom for testing the imaging quality of a variety of medical X-ray equipment, comprising two cube substrates, the four corners of which are rounded corners; each cube substrate is provided with holes of different sizes on one side plane, and part of the holes on the two cube substrates are distributed in mirror images, and the two cube substrates are tightly fitted together by inserting modules arranged in the mirror distribution holes; one side plane of the cube substrate is provided with a reference module, a mammography module, an ordinary X-ray photography module and Computed tomography module, the reference module includes a ball arranged at the center of one side plane of the cube base material and four metal rods arranged at the center of the rounded corners of the side plane of the cube base material; the mammography module includes six circular arrays of cubes evenly distributed on the inner circle of the side plane of the cube base material, seven metal balls linearly distributed on the left side of the sphere, and eight lines linearly distributed on the right side of the sphere; Each wire module has a different diameter, and the wire module is composed of four metal wires distributed in a matrix with the same diameter; the computed tomography module includes six cylinders of the same size among the twelve cylinders and a cylinder inclined at an angle of 30 degrees on the plane on one side of the cube base material;

Further, the cube base material is made of overlapping two polyethylene cubes, which specifically supports each module component and makes the low-density module component image obvious.

Further, the ball is a carbon steel ball, and half of the ball is embedded in the hole at the center of the plane on one side of the cube base material, and the other half is suspended in the air, which is specifically used for the evaluation of crossing line alignment and zero slice position; the four metal rods are respectively brass rods; the four metal rods have the same diameter and different lengths, and their specific reference positions slice position and depth, and are used to detect the Z-axis resolution of CT and the spatial resolution of 3D reconstruction.

Further, the six cubes have different sizes and are made of nylon material respectively, which has the effect of testing the imaging quality of mammography equipment for low-contrast tissues; the diameters of the seven metal balls are different, and the seven metal balls are carbon steel balls, which have the effect of simulating microcalcification in mammography; the diameters of the eight lines are different, and rubber wires are used respectively, which has the effect of simulating mammary glands and tissue structure.

Further, the line connecting the centers of the twelve cylinders is a circle centered on a sphere; among the twelve cylinders, six cylinders with different diameters are made of epoxy resin, which has the effect of detecting the imaging effect of high- and low-contrast materials; the horizontal and vertical distances between the four metal wires are the same as the diameter of the metal wires, and the metal wires are copper wires for detecting the spatial resolution of imaging.

Further, the six cylinders with the same size are respectively made of air, paulownia, epoxy resin, nylon and ABS resin; the cylinder is made of bakelite, which has the effect of using trigonometric function method to detect the thickness of the section slice scanned by computer tomography equipment.

An image quality analysis system for testing phantoms of medical X-ray imaging equipment, including a gray scale analysis module, a spatial resolution analysis module, a positioning and deformation analysis module, a contrast analysis module, a tolerance analysis module, a geometric distortion analysis module and an active ROI selection analysis module;

The grayscale analysis module is used to analyze the image grayscale of twelve cylinders in the reference module, six cubes and eight lines in the mammogram module, and calculate the grayscale of the reference module and the mammogram module;

The spatial resolution analysis module is used to analyze the eight wire modules in the common X-ray photography module, and calculates the resolution through the horizontal and vertical spacing of the wires in each wire module;

The positioning and deformation analysis module is used to analyze the eight wire modules and four metal rods in the ordinary X-ray photography module, and calculate the spatial position and deformation through the difference in the horizontal and vertical spacing of the metal wires;

The contrast analysis module is used to calculate the imaging effects of the high and low contrast materials of the twelve cylinders in the common X-ray photography module;

The latitude analysis module is used to analyze the seven metal balls and eight lines in the mammography module to determine the display latitude of the device image;

The geometric distortion analysis module is used to analyze the geometric distortion of the cylinder in the computed tomography module and the test image;

The active selection ROI analysis module is used to self-select ROI for image testing of resolution, linearity, contrast, geometric distortion, spatial resolution, and positioning;

A working method for testing a phantom of medical X-ray imaging equipment, comprising the following steps:

(1) Place the phantom on the examination bed of the equipment, adjust the body position, and prepare for scanning;

(2) Adjust the scanning field of view of the equipment so that the scanning field of view completely covers the phantom, and continue to scan the phantom to obtain corresponding inspection images;

(3) Import the inspection image obtained in step (2) into the image quality analysis system, select the image source device in the menu, select the parameter information to be detected, and click to analyze;

(4) The image quality analysis system will automatically analyze the image data results and compare them with the image data of equipment with normal parameters and imaging standards. If the parameters fluctuate within a certain range, the imaging quality is normal. Otherwise, the equipment needs to be debugged.

Further, in the step (1), the equipment is mammography, general X-ray photography or computed tomography equipment.

Further, in the step (4), the image quality analysis system analyzes the grayscale and resolution of images of plane X-ray equipment such as analog X-ray imaging, digital X-ray imaging, mammography, CR, DR, and perspective according to the image grayscale and resolution obtained by mammography and ordinary X-ray photography scanning; the image quality analysis system analyzes the spatial resolution, contrast, linearity, geometric distortion, and magnification of CT imaging image quality according to the 3D model reconstructed from the DICOM image obtained by scanning the computed tomography device, the grayscale of the DICOM image, and the resolution of the DICOM image. rate, modulation transfer function, and Z-axis spatial resolution.

Compared with prior art, the beneficial effect of the present invention is:

(1) Use a cube base material to support each module component, and make the imaging of low-density module components obvious; use a reference module to realize cross-line alignment and zero-slice position evaluation and benchmark positioning slice position and depth; use a mammography module to test the imaging quality of mammography equipment for low-contrast tissues, and simulate breast glands and tissue structures; use ordinary X-ray photography modules to detect imaging effects of high and low contrast materials and planar imaging. The HU linearity and light sensitivity of the layer scanning equipment; save costs, achieve the purpose of multiple uses of a phantom, reduce the use of personnel, ensure test results and efficiency, save time, alleviate the lack of human resources in institutional departments, and ensure the results and analysis of image quality;

(2) Use the image quality analysis system to obtain accurate test results, eliminate the subjective judgment errors of testers during the test process, and shorten the test time.

Description of drawings

Fig. 1 is the top view of the cube base material of the embodiment of the present invention;

Fig. 2 is the structural diagram of twelve cylinders in the common X-ray photography module of the embodiment of the present invention;

Fig. 3 is a structural diagram of six cubes in the reference module and the mammography module of the embodiment of the present invention;

Fig. 4 is the structural view of six wire modules in the common X-ray photography module of the embodiment of the present invention;

Fig. 5 is the structural view of seven metal balls in the mammography module of the embodiment of the present invention;

Fig. 6 is a structure diagram of eight lines in the mammography module of the embodiment of the present invention;

Among them, 1. An epoxy resin cylinder with a bottom area diameter of 3mm*3mm; 2. An epoxy resin cylinder with a bottom area diameter of 4mm*4mm; 3. An epoxy resin cylinder with a bottom area diameter of 6mm*6mm; 4. An epoxy resin cylinder with a bottom area diameter of 8mm*8mm; 5. An epoxy resin cylinder with a bottom area diameter of 10mm*10mm; Bakelite cylinder, 8. Nylon cylinder with a bottom area diameter of 20mm*20mm, 9. ABS resin cylinder with a bottom area diameter of 20mm*20mm, 10. Paulownia cylinder with a bottom area diameter of 20mm*20mm, 11. Air cylinder with a bottom area diameter of 20mm*20mm, 12. Epoxy resin cylinder with a bottom area diameter of 2mm*2mm, 13. Nylon cube with a size of 2mm*2mm*2mm, 14. 15. A nylon cube with a size of 3mm*3mm*3mm; 16. A nylon cube with a size of 4mm*4mm*4mm; 17. A brass cylinder with a bottom area of 3mm*12mm in diameter; Nylon cube, 21. Brass cylinder with bottom area diameter of 3mm*16mm, 22. Nylon cube with size of 10mm*10mm*10mm, 23. Brass cylinder with bottom area diameter of 3mm*20mm, 24. Carbon steel ball with diameter of 2mm, 25. Copper wire module with diameter of 0.1mm*1mm, 26. A group of copper wire modules with diameter of 0.2mm*2mm, 27. A group of diameter of 0.3mm*3 mm copper wire module, 28, a set of copper wire modules with a diameter of 0.4mm*4mm, 29, a set of copper wire modules with a diameter of 0.5mm*5mm, 30, a set of copper wire modules with a diameter of 0.6mm*6mm, 31, a carbon steel ball with a diameter of 3mm, 32, a carbon steel ball with a diameter of 2mm, 33, a carbon steel ball with a diameter of 1.5mm, 34, a carbon steel ball with a diameter of 1mm, 35, a carbon steel ball with a diameter of 0.7mm Steel ball, 36. Carbon steel ball with a diameter of 0.5mm, 37. Carbon steel ball with a diameter of 0.35mm, 38. Rubber wire with a cross-sectional diameter of 3mm*20mm, 39. Rubber wire with a cross-sectional diameter of 2mm*20mm, 40. Rubber wire with a cross-sectional diameter of 1.5mm*20mm, 41. Rubber wire with a cross-sectional diameter of 1mm*20mm, 42. Rubber wire with a cross-sectional diameter of 0.8mm*20mm, 43. 0.6mm*20mm rubber thread, 44. Rubber thread with a cross-sectional diameter of 0.5mm*20mm, 45. Rubber thread with a cross-sectional diameter of 0.4mm*20mm.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "comprises" are used in this specification, they indicate the presence of features, steps, operations, means, components and/or combinations thereof.

In a typical implementation of the present application, as shown in Figure 1, a phantom for testing the imaging quality of various medical X-ray equipment is provided, which includes two cube substrates, the four corners of which are rounded corners, and holes of different sizes are respectively arranged on one side plane of each cube substrate, and part of the holes of the two cube substrates are distributed in a mirror image; The beneficial effects produced are: supporting each module component, and making the imaging of the low-density module component obvious; the base material simulates human body soft tissue with similar thickness, and can be used to detect the uniformity of X-ray imaging.

One side plane of the cube substrate is provided with a reference module, a mammography module, a common X-ray photography module and a computed tomography module; the reference module, the mammography module, the common X-ray photography module and the computed tomography module are respectively placed in corresponding slots on one side plane of the cube substrate.

As shown in Figure 3, the reference module includes a ball arranged at the center of the plane on one side of the cube substrate and four metal rods arranged at the center of the rounded corners on one side of the cube substrate; the ball is a carbon steel ball 24 with a diameter of 2 mm, and half of the ball is embedded in the hole at the center of the plane on one side of the cube substrate, and the other half is suspended in the air for the centering of crossing lines and the evaluation of the zero slice position; the diameters of the four metal rods are the same, and the lengths are different. A brass rod 17 with a diameter of 3mm*12mm, a brass rod 21 with a bottom area diameter of 3mm*16mm, and a brass rod 23 with a bottom area diameter of 3mm*20mm are used to locate the position and depth of the slice as a reference, and are used to detect the Z-axis resolution of CT and the spatial resolution of 3D reconstruction, and calculate the geometric distortion and magnification of the image through centroid calculation.

As shown in Fig. 3, Fig. 5 and Fig. 6, the mammography module includes six circular arrays of cubes evenly distributed on the inner plane of one side of the cube substrate, seven metal balls linearly distributed on the left side of the ball and eight lines linearly distributed on the right side of the ball; the six cubes have different sizes and are made of nylon material respectively. The six cubes are nylon cube 13 with a size of 2mm*2mm*2mm, nylon cube 15 with a size of 3mm*3mm*3mm, and a size of 4mm*4mm Nylon cube 16 with a size of 6mm*6mm*6mm, nylon cube 19 with a size of 6mm*6mm*6mm, nylon cube 20 with a size of 8mm*8mm*8mm, and nylon cube 22 with a size of 10mm*10mm*10mm are used to test the imaging quality of mammography equipment for low-contrast tissues; the diameters of the seven metal balls are different. Carbon steel ball 33 with a diameter of 1.5 mm, carbon steel ball 34 with a diameter of 1 mm, carbon steel ball 35 with a diameter of 0.7 mm, carbon steel ball 36 with a diameter of 0.5 mm, and carbon steel ball 37 with a diameter of 0.35 mm are used to simulate mammography microcalcification; the eight lines are respectively a rubber line 38 with a cross-sectional diameter of 3 mm*20 mm, a rubber wire 39 with a cross-sectional diameter of 2 mm*20 mm, and a cross-sectional diameter of 1.5 mm*20 mm rubber wire 40, rubber wire 41 with a cross-sectional diameter of 1mm*20mm, rubber wire 42 with a cross-sectional diameter of 0.8mm*20mm, rubber wire 43 with a cross-sectional diameter of 0.6mm*20mm, rubber wire 44 with a cross-sectional diameter of 0.5mm*20mm, and rubber wire 45 with a cross-sectional diameter of 0.4mm*20mm. MTF).

As shown in Figures 2 and 4, the common X-ray photography module includes twelve circular arrays of cylinders evenly distributed on the periphery of one side of the cube substrate, and six wire modules linearly distributed above the sphere. The diameter of each wire module is different. The wire module is composed of four metal wires with the same diameter distributed in a matrix. The horizontal and vertical distances between the four wires are the same as the diameter of the wires. The center of the circle collects the projection values passing through 12 cylinders, and according to the values, the system can automatically calculate and compare the density to obtain contrast data; among the twelve cylinders, six cylinders with different diameters are made of epoxy resin, which are epoxy resin cylinders with a bottom area diameter of 2mm*2mm, epoxy resin cylinders with a bottom area diameter of 3mm*3mm, epoxy resin cylinders with a bottom area diameter of 4mm*4mm, epoxy resin cylinders with a bottom area diameter of 4mm*4mm, epoxy resin cylinders with a bottom area diameter of 6mm*6mm, epoxy resin cylinders with a bottom area diameter of 8mm*8mm The cylinder 4 and the epoxy resin cylinder 5 with a bottom area diameter of 10mm*10mm; the six wire modules are respectively a copper wire module 25 with a diameter of 0.1mm*1mm, a copper wire module 26 with a diameter of 0.2mm*2mm, a copper wire module 27 with a diameter of 0.3mm*3mm, a copper wire module 28 with a diameter of 0.4mm*4mm, a copper wire module 29 with a diameter of 0.5mm*5mm, and a copper wire module 30 with a diameter of 0.6mm*6mm. The spatial resolution used to detect imaging.

As shown in Figure 2 and Figure 3, the computed tomography module includes six cylinders of the same size among the twelve cylinders and a cylinder that is inclined at an angle of 30 degrees and is arranged on the plane of one side of the cube substrate; the six cylinders of the same size are respectively made of air, Paulownia, epoxy resin, nylon and ABS resin, and are respectively an epoxy resin cylinder 6 with a bottom area diameter of 20mm*20mm, a bakelite cylinder 7 with a bottom area diameter of 20mm*20mm, and a nylon cylinder 8 with a bottom area diameter of 20mm*20mm. An ABS resin cylinder 9 with a diameter of 20mm*20mm, a Paulownia cylinder 10 with a bottom area diameter of 20mm*20mm, and an air cylinder 11 with a bottom area diameter of 20mm*20mm are used for HU linearity and photosensitive measurement of computer tomography equipment; the cylinder is made of bakelite, which is an inclined bakelite cylinder 18 with a bottom area diameter of 2mm*20mm, which is used to detect the thickness of CT scanning section slices, that is, the layer thickness, using trigonometric functions.

In order to reduce or reduce the problem of detection errors due to different training levels of detection personnel or subjective judgments, another typical implementation of the present application provides an image quality analysis system based on a phantom for testing medical X-ray imaging equipment, including a gray scale analysis module, a spatial resolution analysis module, a positioning and deformation analysis module, a contrast analysis module, a tolerance analysis module, a geometric distortion analysis module, and an active ROI selection analysis module.

The grayscale analysis module is used to analyze the image grayscales of the twelve cylinders in the reference module, six cubes and eight lines in the mammogram module, and calculate the grayscale of the reference module and the mammogram module.

The spatial resolution analysis module is used to analyze the eight wire modules in the common X-ray photography module, and the resolution is calculated through the horizontal and vertical spacing of the wires in each wire module.

The positioning and deformation analysis module is used to analyze the eight wire modules and four metal rods in the ordinary X-ray photography module, and calculate the spatial position and deformation through the difference in the horizontal and vertical spacing of the metal wires.

The contrast analysis module is used to calculate the imaging effects of the high and low contrast materials of the twelve cylinders in the general X-ray photography module.

The tolerance analysis module is used to analyze the seven metal balls and eight lines in the mammography module to determine the display tolerance of the device image.

The geometric distortion analysis module is used to analyze the cylinder in the computed tomography module and test the geometric distortion of the image.

Actively select the ROI analysis module, which is used to self-select ROI for image testing of resolution, linearity, contrast, geometric distortion, spatial resolution, and positioning.

The image quality analysis system is a packaging system based on the Matlab algorithm level. The image quality analysis system can run on workstations connected to X-ray equipment, and can also run on ordinary computers. The analyzable content of the image quality analysis system is to analyze the gray scale and resolution of plane X-ray equipment images such as analog X-ray imaging, digital X-ray imaging, mammography, CR, DR, and perspective, as well as the spatial resolution, contrast, linearity, geometric distortion, magnification, modulation transfer function, and Z-axis spatial resolution of CT imaging. The specific working process is as follows: the image quality analysis system can test the density difference and contrast between the base material and each module component in the image according to the grayscale; it can test the interval, shape and linearity of the modules in the image according to the resolution voxel; the image quality analysis system can analyze the spatial resolution, contrast, linearity, geometric distortion, magnification, modulation transfer function and Z-axis spatial resolution of the image quality of the scanning device based on the 3D model reconstructed from the DICOM image scanned by the computer tomography equipment, the gray level of the DICOM image, and the resolution of the DICOM image. Independently select a region of interest (ROI), analyze the selected ROI, and test to obtain data information such as density, contrast, and resolution; thereby accurately obtain test results, eliminate subjective judgment errors by testers during the test process, and shorten test time.

In another typical implementation of the present application, a working method for testing a phantom of medical X-ray imaging equipment is provided, which is characterized in that it includes the following steps:

(1) Preparation: Place the phantom on the examination bed of mammography, general X-ray photography or computed tomography equipment, adjust the body position, and prepare for scanning;

(2) Scanning work: adjust the scanning field of view of mammography, general X-ray photography or computed tomography equipment so that the scanning field of view completely covers the phantom, and continue to scan the phantom to obtain corresponding inspection images;

(3) Import the inspection image obtained in step (2) into the image quality analysis system, select the image source device in the menu, select the parameter information to be detected, and click to analyze;

(4) The image quality analysis system will automatically analyze the image data results and compare them with the image data of equipment with normal parameters and imaging standards. If the parameters fluctuate within a certain range, the imaging quality is normal. Otherwise, the equipment needs to be debugged.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications or deformations that those skilled in the art can make without creative labor are still within the protection scope of the present invention.

Claims (8)

1. A phantom for testing imaging quality of various medical X-ray equipment is characterized by comprising two cube base materials, wherein four corners of each cube base material are respectively provided with a fillet; the two square base materials are closely attached together through the insertion of the modules arranged in the mirror image distribution hole grooves; the X-ray imaging device comprises a square base material and is characterized in that a reference module, a mammography module, a common X-ray radiography module and a computer tomography module are arranged on one side plane of the square base material, and the reference module comprises a sphere arranged at the center of one side plane of the square base material and four metal rods arranged at the circle centers of round corners of one side plane of the square base material; the mammography module comprises six cubes which are evenly distributed on the plane inner ring at one side of the cube base material in a circular array mode, seven metal balls which are linearly distributed on the left side of the round ball, and eight lines which are linearly distributed on the right side of the round ball; the common X-ray photography module comprises twelve circular arrays evenly distributed on the periphery of one side plane of the square base material and six metal wire modules linearly distributed above the sphere, wherein the diameters of the metal wire modules are different, and the metal wire modules consist of four metal wires with the same diameters distributed in a matrix; the computer tomography module comprises six cylinders with the same size in twelve cylinders and a cylinder obliquely arranged on one side plane of the cube base material at an angle of thirty degrees; the reference module, the mammography module, the common radiography module and the computer tomography module are respectively placed in corresponding holes and grooves on one side plane of the cube base material;

the cube base material is prepared by two polyethylene cubes;

the round ball is a carbon steel ball, one half of the round ball is embedded in a hole groove at the center of one side plane of the square base material, and the other half of the round ball is suspended; the four metal bars are brass bars respectively; the four metal bars have the same diameter and different lengths.

2. The phantom for testing imaging quality of various medical X-ray apparatuses according to claim 1, wherein the six cubes are different in size and made of nylon materials, respectively; the diameters of the seven metal balls are different, and the seven metal balls are carbon steel balls; the diameters of the eight lines are different, and rubber lines are adopted respectively.

3. The phantom for testing imaging quality of various medical X-ray devices according to claim 1, wherein the connecting line of the circle centers of the twelve cylinders is a circular ring with a sphere as the circle center; six cylinders with different diameters in the twelve cylinders are made of epoxy resin; the transverse and longitudinal distances among the four metal wires are the same as the diameters of the metal wires, and the metal wires are copper wires.

4. The phantom for testing the imaging quality of a plurality of medical X-ray apparatuses according to claim 1, wherein the six cylinders of the same size are made of air, paulownia, epoxy, nylon and ABS resin, respectively; the cylinder is made of bakelite.

5. An image quality analysis system based on the body model for testing imaging quality of various medical X-ray devices according to claim 1, which is characterized by comprising a gray level analysis module, a spatial resolution analysis module, a positioning and deformation analysis module, a contrast analysis module, a latitude analysis module, a geometric distortion analysis module and an active selection ROI analysis module;

the gray level analysis module is used for analyzing the image gray levels of twelve cylinders in the reference module, six cubes and eight lines in the X-ray breast module and calculating the gray levels of the reference module and the X-ray breast module;

the spatial resolution analysis module is used for analyzing eight metal wire modules in the common X-ray photography module and calculating resolution through the transverse and longitudinal spacing of the metal wires in each metal wire module;

the positioning and deformation analysis module is used for analyzing eight metal wire modules and four metal rods in the common X-ray photography module and calculating the space position and deformation through the difference of the transverse and longitudinal spacing of the metal wires;

the contrast analysis module is used for calculating the imaging effect of high-low contrast materials of twelve cylinders in the common X-ray photography module;

the latitude analysis module is used for analyzing seven metal balls and eight lines in the breast X-ray module and determining the display latitude of the equipment image;

the geometric distortion analysis module is used for analyzing the geometric distortion of the cylinder and the test image in the computed tomography module;

the active ROI selection analysis module is used for self-help ROI selection for image testing of resolution, linearity, contrast, geometric distortion, spatial resolution and positioning.

6. A method of operating a phantom for testing imaging quality of a plurality of medical X-ray devices based on claim 1, comprising the steps of:

(1) Placing a phantom on an inspection bed of the equipment, setting the body position, and preparing for scanning;

(2) Adjusting the scanning visual field of the equipment to enable the scanning visual field to cover the body model completely, and continuing to scan the body model to obtain a corresponding checking image;

(3) Importing the inspection image obtained in the step (2) into an image quality analysis system, selecting image source equipment from a menu, selecting parameter information to be detected, and clicking for analysis;

(4) The image quality analysis system automatically analyzes the image data result and compares the image data result with the image data of equipment with normal parameters and imaging standards, if the parameters float in a certain range, the imaging quality is normal, otherwise, the equipment needs to be debugged.

7. The method of claim 6, wherein in step (1), the apparatus is a mammography, a plain radiography, or a computed tomography apparatus.

8. The method according to claim 6, wherein in the step (4), the image quality analysis system analyzes the gray scale and resolution of the image of the planar X-ray device such as analog X-ray imaging, digital X-ray imaging, breast X-ray imaging, CR, DR, perspective, etc. according to the gray scale and resolution of the image obtained by mammography and plain X-ray scanning; the image quality analysis system analyzes the spatial resolution, contrast, linearity, geometric distortion, magnification, modulation transfer function and Z-axis spatial resolution of CT imaging image quality according to a 3D model reconstructed by the DICOM image obtained by scanning the computer tomography device, the gray level of the DICOM image and the resolution of the DICOM image.