Tool for detecting mechanical performance of CT (Computed Tomography) simulator

Abstract

The utility model discloses a CT (computed tomography) simulator mechanical property detection tool, which relates to the field of CT simulator mechanical property index detection and comprises a cuboid-shaped transparent die body, the geometric center of the die body serves as a zero point, the length direction of the die body serves as an X-axis direction, the width direction of the die body serves as a Y-axis direction, and the height direction of the die body serves as a Z-axis direction. A sphere having a density difference with the die body is placed at the zero point; a plurality of small ball rows are arranged in the die body in the Y-axis direction; a plurality of balls are arranged in each small ball row, and all the balls in the small ball row are arranged in the X-axis direction; a ball body is arranged in the die body in the Z-axis direction of the zero point; rectangular coordinate axes are marked on the left surface, the right surface and the upper surface of the die body, the original point of each rectangular coordinate axis is the projection of a zero point on the corresponding surface, and one of all the rectangular coordinate axes is parallel to the Y axis. According to the utility model, all mechanical performance index detection of the CT simulator can be completed through one-time positioning of the tool.

Description

Technical Field

[0001] This utility model relates to the field of mechanical performance testing of CT simulators, and in particular to a tool for testing the mechanical performance of CT simulators. Background Technology

[0002] CT simulators are the main equipment for precise localization in radiotherapy. They are used to acquire pre-radiotherapy imaging data of patients. Ensuring their reliable operation through quality control is a prerequisite for accurate localization in radiotherapy, and the accuracy of their mechanical performance indicators is the primary foundation for ensuring accurate localization in radiotherapy.

[0003] The "CT Simulator Quality Control Guidelines" recommends methods for testing the accuracy of mechanical performance indicators of CT simulators, which mainly include four items: internal laser, external laser system, bed, and gantry, as detailed below.

[0004] 1. Internal Laser: Turn on the internal laser and place a piece of white paper perpendicular to the coronal plane (or sagittal plane or transverse plane) of the laser within the entire imaging range. Block one side of the laser line locally and evaluate the maximum deviation between the two lasers. Detect the coplanarity of the internal laser in sequence. If it exceeds the tolerance, it needs to be adjusted.

[0005] 2. External Laser System: The test steps for the coplanarity and movement accuracy of the external laser are as follows: a) Turn on the external laser and place a piece of white paper perpendicular to the coronal plane (or sagittal plane or transverse plane) of the laser within the entire imaging range. Block one side of the laser line locally and evaluate the maximum deviation between the two lasers. Check the coplanarity of each external laser plane in turn. If it exceeds the tolerance, it needs to be adjusted; b) Fix the steel ruler to the bed and check the movement accuracy of the laser in each direction in turn. The movement range checked in each direction should include the clinically used range as much as possible.

[0006] 3. Bed body: This includes testing of the following three items;

[0007] 3.1 Detection of the perpendicularity of the longitudinal movement of the bed to the scanning center plane: a) Place two lead points at a certain distance apart along the long axis of the bed; b) Fine-tune the position of the lead points so that the two lead points can be aligned with the laser intersection point in the frame during the longitudinal movement of the bed; c) Scan the two lead points, and calculate the perpendicularity of the longitudinal movement direction of the bed to the scanning plane by the coordinate values ​​of the lead points on the scan image and the distance between the two lead points on the bed.

[0008] 3.2 Detection of longitudinal movement positioning accuracy: Place a long ruler horizontally on the bed surface along the y-axis, align the cross-section laser with the 0 mark, move it in and out of the bed, read the scale value, and compare the distance on the ruler with the value of the CT-Sim indicator.

[0009] 3.3 Testing the accuracy of lifting and lowering movement: Place a long ruler vertically on the bed, align the crown laser with the 0 mark, raise and lower the bed, observe the lifting distance of the laser light on the ruler, and compare it with the value of the indicator.

[0010] 4. Rack: Includes the testing of the following two items;

[0011] 4.1 The steps for testing the accuracy of the gantry tilt angle indication are as follows: a) After confirming that the gantry 0° indication is accurate, fix the film in a 2cm to 4cm thick layer of solid water; b) Using the laser inside the gantry, place the solid water vertically inside the CT-Sim scanning ring and perpendicular to the scanning plane; c) After the CT-Sim performs a thin-layer scan of the solid water at 0° on the gantry, tilt the gantry forward and backward at certain angles respectively, and perform thin-layer scans using the same method; The CT-Sim gantry tilt angle can be obtained by measuring the exposed film with a protractor, and the deviation between the measured result and the indicator reading is the accuracy of the gantry tilt angle indication;

[0012] 4.2 The testing steps for the gantry tilt correction capability are as follows: a) Paste the coordinate paper on the bed, so that the laser inside the gantry intersects at a certain point on the coordinate paper, and mark it; b) Tilt the gantry to a certain angle and then restore it to 0°; c) Observe the degree of coincidence between the laser intersection point inside the gantry and the marked point on the coordinate paper, which reflects the vertical correction capability of the CT-Sim gantry.

[0013] From the above description, it can be determined that the testing methods described in the "CT Simulator Quality Control Guidelines" employ multiple tools, and each tool can only be used for one item. Furthermore, many published Chinese patents exist, such as Chinese patent CN119246016A, which discloses a system and equipment for testing the performance of a radiotherapy laser positioning system; this too only tests a single item. Another example is Chinese patent CN209933861U, which discloses a multifunctional image-guided verification phantom. This phantom performs item testing by scanning images and then comparing them, resulting in significant image size errors. Moreover, this phantom is used in treatment equipment such as accelerators, which are fundamentally different from CT simulators. The core of mechanical inspection of treatment equipment is ensuring that the beam accurately hits the target (radiation isocenter). All examinations revolve around the spatial geometric accuracy and directivity of the treatment beam, ultimately serving to deliver radiation dose safely and accurately. The core of mechanical examinations for CT simulators is to ensure that images accurately reflect the position and shape of anatomical structures (image isocenter). All examinations revolve around the geometric fidelity and spatial consistency of the image acquisition system, ultimately serving to obtain distortion-free images for precise target localization and planning. Therefore, it is difficult to apply the phantoms used in the mechanical performance examination of treatment equipment to CT simulators. Consequently, to fully test the mechanical performance indicators of CT simulators, it is currently necessary to constantly change tools to test each item. When changing tools, placement errors are inevitable, resulting in inaccuracies in other mechanical performance items after the corresponding item has been tested and adjusted.

[0014] Therefore, a comprehensive tool and testing method is needed to complete the testing of all mechanical performance indicators of the CT simulator. Utility Model Content

[0015] The purpose of this utility model is to provide a mechanical performance testing tool for a CT simulator, which can complete the testing of all mechanical performance indicators of the CT simulator in a single setup, in order to address the problems mentioned above.

[0016] The technical solution adopted by this utility model is as follows: A mechanical performance testing tool for a CT simulator includes a rectangular transparent mold, with the geometric center of the mold as the zero point, the length direction as the X-axis direction, the width direction as the Y-axis direction, and the height direction as the Z-axis direction; a sphere with a density difference from the mold is placed at the zero point; multiple rows of small ball rows are arranged inside the mold in the Y-axis direction; each small ball row contains multiple spheres, and all the spheres in the small ball row are arranged along the X-axis direction; a sphere is arranged inside the mold in the Z-axis direction where the zero point is located; the two surfaces of the mold in the X-axis direction are the left surface and the right surface, and the two surfaces of the mold in the Z-axis direction are the upper surface and the lower surface, and the left surface, the right surface, and the upper surface are all marked with rectangular coordinate axes, the origin of the rectangular coordinate axes is the projection of the zero point on the corresponding surface, and there is one axis in all rectangular coordinate axes that is parallel to the Y-axis.

[0017] Furthermore, the geometric dimensions of the mold are 30cm in length, 30cm in width, and 20cm in height; the spacing between the rows of small balls is 10cm, and the spacing between adjacent balls in the small ball rows is 5cm.

[0018] Furthermore, the multiple rows of small balls are arranged in a symmetrical linear array about the X-axis where the zero point is located; or / and the multiple balls in the small ball row are arranged in a symmetrical linear array about the Y-axis where the zero point is located.

[0019] Furthermore, a level is arranged at the corner of the upper surface.

[0020] Furthermore, it also includes a base, wherein multiple leveling legs are provided between the base and the lower surface, and the multiple leveling legs are evenly distributed at the corners of the small surface.

[0021] Furthermore, the leveling support leg is a screw, one end of which is threadedly connected to the mold body, and the other end of which is rotatably connected to the base.

[0022] Furthermore, a rotating handle is coaxially mounted on the screw.

[0023] Furthermore, the base has rubber pads or textured surfaces to increase roughness on the surfaces that come into contact with the bed.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0025] 1. The tool proposed in this utility model eliminates the need for repeated placement during testing, thus avoiding testing errors caused by placement.

[0026] 2. Compared with existing testing methods and models, this utility model can directly complete the testing of all items in one go. Attached Figure Description

[0027] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the layout of a CT simulator;

[0030] Markings in the diagram: 1-Phantom body; 11-Upper surface; 12-Lower surface; 13-Left surface; 14-Right surface; 15-Right-angle coordinate axis; 16-Small ball row; 161-Sphere; 2-Level instrument; 3-Leveling support leg; 4-Base; 5-Rubber pad; 6-Bed; 7-External laser; 8-Frame. Detailed Implementation

[0031] In the description of this specification, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification.

[0032] Furthermore, the use of terms such as "horizontal" or "vertical" in this specification does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this specification, it should also be noted that, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” should be interpreted broadly. For example, a link can be a fixed link, a detachable link, or an integral link; it can be a mechanical link or an electrical link; it can be a direct link or an indirect link through an intermediate medium; it can be a connection within two components.

[0034] The tolerances and design ranges described in this manual can be obtained from the contents of the "CT Simulator Quality Control Guidelines". The specific ranges will not be explained in detail.

[0035] Example 1

[0036] like Figure 1As shown, a mechanical performance testing tool for a CT simulator includes a transparent, rectangular phantom 1 with a length of 30cm, a width of 30cm, and a height of 20cm. The geometric center of the phantom 1 is taken as the zero point, with the length direction along the X-axis, the width direction along the Y-axis, and the height direction along the Z-axis. A sphere 161 with a density difference from the phantom 1 is placed at the zero point. When the sphere 161 with a density difference is scanned, the scanned image can be distinguished from the phantom 1, thus making the sphere 161 clearly visible. Feasibly, the diameter of the sphere 161 is 1mm or 2mm. With the X-axis where the zero point is located as the line of symmetry, multiple rows of small spheres 16 are arranged inside the phantom 1 along the Y-axis. The spacing between them is 10cm; each small ball row 16 contains multiple balls 161, and all the balls 161 in the small ball row 16 are arranged along the X-axis and symmetrical about the Y-axis where the zero point is located, with a spacing of 5cm between the balls 161; in the Z-axis direction where the zero point is located, the mold 1 contains balls 161; the two surfaces of the mold 1 in the X-axis direction are the left surface 13 and the right surface 14, and the two surfaces of the mold 1 in the Z-axis direction are the upper surface 11 and the lower surface 12, and the left surface 13, the right surface 14 and the upper surface 11 are all marked with rectangular coordinate axes 15, the origin of the rectangular coordinate axes 15 is the projection of the zero point on the corresponding surface, and there is an axis in all the rectangular coordinate axes 15 that is parallel to the Y-axis.

[0037] In this embodiment, a level 2 is provided at the corner of the upper surface 11 of the mold 1. Multiple levels 2 are used to determine whether the mold 1 is in a horizontal state, thereby ensuring the accuracy of subsequent measurements.

[0038] It should be noted that the CT simulator bed 6 is difficult to be perfectly level, and the bed 6 will also be tilted after the patient lies down due to uneven weight distribution. Therefore, according to the "CT Simulator Quality Control Guidelines", the tilt of the bed 6 can be considered to be level as long as it is within the allowable range. Thus, the bed 6 may be tilted, but the tilt is within the allowable range. Leveling the simulator 1 can avoid the superposition of the tilt of the bed 6 and the tilt of the simulator 1, and reduce the measurement error caused by the tilt.

[0039] In this embodiment, a base 4 is also included. Multiple leveling legs 3 are provided between the base 4 and the lower surface 12. The multiple leveling legs 3 are evenly distributed at the corners of the small surface. The height of each leveling leg 3 is used to make the mold body 1 level.

[0040] Furthermore, the leveling support leg 3 is a screw. One end of the screw is threaded to the mold body 1, and the other end of the screw is rotatably connected to the base 4. By rotating the screw, the size of the screw screw screwing into the mold body 1 is changed, thereby changing the length of the screw between the lower surface 12 and the base 4, thereby realizing the adjustment of the levelness of the mold body 1.

[0041] Furthermore, a rotating handle is coaxially mounted on the screw for easy rotation.

[0042] In this embodiment, a rubber pad 5 or a textured surface with increased roughness is provided on the surface of the base 4 that is in contact with the bed 6, so as to increase the friction between the base 4 and the bed 6, improve the positional stability of the mold 1 placed on the bed 6, and avoid relative displacement between the mold 1 and the bed 6.

[0043] In this embodiment, the mechanical properties of the bed 6 are tested by the distribution of small ball rows 16 on the phantom 1; the mechanical properties of the internal laser are tested by the distribution of spheres 161 in the small ball rows 16; the mechanical properties of the external laser 7, the moving accuracy of the bed 6, and the tilt angle correction capability of the frame 8 are tested by the dimensions of the surface of the phantom 1; and the tilt angle of the frame 8 is determined by the spheres 161 in the Z-axis direction. Therefore, the tool proposed in this embodiment does not require repeated positioning when testing the mechanical properties of the CT simulator, avoiding the detection errors caused by positioning, and can directly complete the testing of all items in one go using only this tool.

[0044] Example 2

[0045] A method for testing the mechanical performance of a CT simulator, using the CT simulator mechanical performance testing tool described in Example 1, wherein there are 3 rows of small ball rows 16, and each row of small ball rows 16 contains 5 balls 161; the method includes the following steps:

[0046] S1: Before testing, use a level to check whether the tilt of the CT simulator bed 6 is within the tolerance range. If the tilt is within the tolerance range, proceed to the next step; if the tilt exceeds the tolerance range, the tilt of the bed 6 must be adjusted to the tolerance range before proceeding to the next step.

[0047] S2: Place the tool on the bed 6, observe all the levels 2 on the phantom 1, and adjust the leveling legs 3 until all the levels 2 are level before proceeding to the next step. When placing the tool, ensure that the X-axis of the phantom 1 is as parallel as possible to the X-axis of the CT simulator, and the Y-axis of the phantom 1 is as parallel as possible to the Y-axis of the CT simulator.

[0048] S3: Position and orientation of the tool so that the rectangular coordinate axes 15 on the left surface 13, right surface 14 and upper surface 11 are aligned with the crosshairs of the outer laser 7 in the corresponding directions.

[0049] S4: Move the bed 6 so that the bed 6 carries the mold 1 into the frame 8, and use the internal laser to scan any row of small balls 16. Preferably, the small ball row 16 to be scanned is the small ball row 16 that passes through the zero point position. The scanning method is an axis scan with the diameter of the ball 161 as the scanning range, including steps S41-S43.

[0050] S41: If the scanned image is clear and at least one axis of the rectangular coordinate axis 15 of the upper surface 11 coincides with the indicator crosshair within the tolerance range, then the mechanical properties of the inner laser, the coplanarity of the outer laser 7 and its parallelism and perpendicularity to the scanning surface, the perpendicularity of the bed 6's movement in the Y-axis direction to the scanning surface, and the placement of the phantom 1 meet the requirements; among which, the mechanical properties of the inner laser include the coplanarity of the inner laser, the parallelism and perpendicularity of the inner laser to the scanning surface, and the coincidence of the inner laser's indicator crosshair with the scanning center point. The specific manifestations in this step are as follows:

[0051] The indicator crosshairs of the inner laser coincide with the origin of the rectangular coordinate axis 15 of the upper surface 11; in the scanned image, the five small balls appear clearly at the X coordinate positions of (-10, -5, 0, 5, 10).

[0052] S42: If the scanned image is clear but the alignment of the Cartesian coordinate axis 15 of the upper surface 11 with the indicator crosshair is outside the tolerance range, the placement of the mold 1 needs to be shifted until the scanned image is clear and at least one axis of the Cartesian coordinate axis 15 of the upper surface 11 is within the tolerance range when it aligns with the indicator crosshair. This step is specifically manifested as follows:

[0053] The indicator crosshairs of the inner laser do not coincide with the origin of the rectangular coordinate axis 15 of the upper surface 11; in the scanned image, the five small balls appear clearly at positions other than (-10, -5, 0, 5, 10) on the X coordinate, indicating that the placement of the model 1 is off-center.

[0054] S43: If the scanned image is unclear, first adjust the placement of the phantom 1 until the scanned image is clear and at least one axis of the Cartesian coordinate axis 15 on the upper surface 11 coincides with the indicator crosshair within the tolerance range, then proceed to steps S431-S432; the specific behavior of this step is as follows:

[0055] The indicator crosshair of the inner laser does not coincide with the origin of the rectangular coordinate axis 15 of the upper surface 11; in the scanned image, at least one of the five small balls is unclear, which may be due to incorrect placement of the phantom 1, such as the Y-axis direction of the phantom 1 being at an angle to the Y-axis direction of the bed 6, or the mechanical properties of the outer laser 7 and the bed 6 not meeting the requirements.

[0056] S431: Translate the bed 6 along the Y-axis to scan the multiple rows of small ball arrays 16. If the scanned images of each row of small ball arrays 16 are clear, the mechanical performance of the internal laser meets the requirements. If at least one row of small ball arrays 16 produces an unclear image, the perpendicularity of the bed 6 to the scanning surface in the Y-axis direction needs to be adjusted until the scanned images of each row of small ball arrays 16 are clear. This step mainly determines whether the mechanical performance of the bed 6 meets the requirements. The specific performance in this step is as follows:

[0057] The bed 6 moves along the Y-axis, and the internal laser scans each row of small balls 16. That is, the bed 6 can move within the range of (-10, 10). The 20cm range of movement is sufficient to judge the mechanical performance of the bed 6. The mechanical performance of the bed 6 is mainly reflected in the perpendicularity of the displacement of the bed 6 in the Y-axis direction to the scanning surface.

[0058] S432: Translate the bed 6 along the Y-axis to return the phantom 1 to the position where the external laser 7 emits its laser. Observe whether the rectangular coordinate axes 15 on the left surface 13, right surface 14, and upper surface 11 are aligned with the crosshairs of the external laser 7 in the corresponding directions. If aligned, the mechanical properties of the inner laser, the coplanarity of the external laser 7, its parallelism and perpendicularity to the scanning surface, the perpendicularity of the bed 6's movement along the Y-axis to the scanning surface, and the placement of the phantom 1 meet the requirements. If not aligned, adjust the external laser 7 until the rectangular coordinate axes 15 on the left surface 13, right surface 14, and upper surface 11 are aligned with the crosshairs of the external laser 7 in the corresponding directions. This step mainly determines whether the mechanical properties of the external laser 7 meet the requirements, primarily the coplanarity of the external laser 7 and its parallelism and perpendicularity to the scanning surface. The specific performance in this step is as follows:

[0059] The bed 6 moves along the Y-axis out of the frame 8 and moves to the position of the laser emitted by the external laser 7. Since the position of the mold 1 and / or the bed 6 has been adjusted in the previous steps, it is necessary to verify again whether the crosshair of the external laser 7 can be aligned with the origin of the rectangular coordinate axis 15.

[0060] S5: Click on the external laser 7 control software in sequence to check the distance the external laser 7 moves in each direction and the distance the crosshair of the external laser 7 moves on the vertical coordinate axis. If they are within the tolerance, the movement accuracy of the external laser 7 in each direction is accurate; otherwise, the movement accuracy of the external laser 7 is inaccurate, and the movement mechanical performance of the external laser 7 needs to be adjusted.

[0061] S6: Translate the bed 6 along the X-axis, Y-axis and Z-axis respectively, and check the movement distance of the bed 6 in each direction and the movement distance of the crosshair of the external laser 7 on the vertical coordinate axis. If they are within the tolerance, the movement accuracy of the bed 6 in each direction is accurate; otherwise, the movement accuracy of the bed 6 is inaccurate and the movement mechanical performance of the bed 6 needs to be adjusted.

[0062] S7: The rack 8 tilt performance test includes steps S71-S72;

[0063] S71: Detect the tilt angle; move the bed 6, and the bed 6 carries the model 1 so that the model 1 enters the frame 8. Perform an axis scan on the sphere 161 in the Z-axis direction where the zero point is located. If three scanning spheres appear on the scanned cross-sectional image, it means that the tilt angle α of the frame 8 is 0°. When the tilt angle of the frame 8 is 0°, measure the distance between the upper and lower edges of the cross-sectional image of the model as L1. Tilt the frame and perform an axis scan on the sphere 161 in the Z-axis direction where the zero point is located again. Only one scanning sphere appears on the scanned cross-sectional image. Measure the distance between the upper and lower edges of the cross-sectional image of the model as L2. Calculate the tilt angle α of the frame 8 using inverse trigonometric functions: α = arccosL1 / L2.

[0064] S72: Test tilt angle correction capability; First, align the indicator crosshair of the inner laser with a certain scale in the rectangular coordinate system on the upper surface 11 of the mold body 1. Then, change the tilt angle of the frame 8 and then adjust the angle back. After adjustment, if the overlap between the indicator crosshair and the scale is within the tolerance, the tilt angle correction capability meets the requirements; otherwise, if the overlap between the indicator crosshair and the scale is outside the tolerance, the tilt angle correction capability does not meet the requirements.

[0065] S8: Remove phantom 1 and complete all mechanical performance tests of the CT simulator.

[0066] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A tool for testing the mechanical properties of a CT simulator, characterized in that: The system includes a rectangular, transparent mold (1), with its geometric center as the zero point, its length along the X-axis, its width along the Y-axis, and its height along the Z-axis. A sphere (161) with a density difference from the mold (1) is placed at the zero point. Multiple rows of small spheres (16) are arranged within the mold (1) along the Y-axis. Each small sphere (16) contains multiple spheres (161), and all the spheres (161) in the small sphere (16) are arranged along the X-axis. Along the Z-axis where the zero point is located, the mold... A sphere (161) is provided inside the body (1); the two surfaces of the mold (1) in the X-axis direction are the left surface (13) and the right surface (14), and the two surfaces of the mold (1) in the Z-axis direction are the upper surface (11) and the lower surface (12). The left surface (13), the right surface (14) and the upper surface (11) are all marked with rectangular coordinate axes (15). The origin of the rectangular coordinate axis (15) is the projection of the zero point on the corresponding surface, and there is an axis parallel to the Y-axis in all the rectangular coordinate axes (15).

2. The CT simulator mechanical performance testing tool according to claim 1, characterized in that: The geometric dimensions of the mold (1) are 30cm long, 30cm wide and 20cm high; the spacing between the rows of small balls (16) is 10cm and the spacing between adjacent balls (161) in the row of small balls (16) is 5cm.

3. The CT simulator mechanical performance testing tool according to claim 1, characterized in that: The multiple rows of small balls (16) are arranged in a symmetrical linear array about the X-axis where the zero point is located; or / and the multiple balls (161) in the small balls (16) are arranged in a symmetrical linear array about the Y-axis where the zero point is located.

4. The CT simulator mechanical performance testing tool according to claim 1, characterized in that: A level (2) is arranged at the corner of the upper surface (11).

5. The CT simulator mechanical performance testing tool according to claim 4, characterized in that: It also includes a base (4), and a plurality of leveling legs (3) are provided between the base (4) and the lower surface (12), and the plurality of leveling legs (3) are evenly distributed at the corners of the small surface.

6. The CT simulator mechanical performance testing tool according to claim 5, characterized in that: The leveling support leg (3) is a screw rod. One end of the screw rod is threadedly connected to the mold body (1), and the other end of the screw rod is rotatably connected to the base (4).

7. The CT simulator mechanical performance testing tool according to claim 6, characterized in that: A rotating handle is coaxially mounted on the screw.

8. The CT simulator mechanical performance testing tool according to claim 5, characterized in that: A rubber pad (5) or a textured surface with increased roughness is provided on the base (4) for contact with the bed (6).

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