A new phantom for testing PET sensitivity and spatial resolution

Abstract

The utility model discloses a new phantom for testing PET sensitivity and spatial resolution, comprising a base platform, a probe seat, a rotating shaft seat, and an up-and-down moving assembly, wherein a side edge of the base platform is fixedly connected to a side plate, one side of the outer end of the side plate is fixedly connected to the up-and-down moving assembly, the other side of the up-and-down moving assembly is fixedly connected to a rotating shaft seat, the rotating shaft seat is rotatably connected to a probe seat, and one end of the probe seat is provided with a movable bite. The utility model aims to provide a phantom that is convenient to operate, has strong adaptability, is stable in structure, and improves the test accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of medical detection, in particular to a new phantom for testing the sensitivity and spatial resolution of PET. Background Art

[0002] At present, the phantoms used to test the sensitivity and spatial resolution of PET are composed of two rectangular acrylic plates. When measuring the sensitivity and spatial resolution of PET, the two rectangular acrylic plates are combined and placed on the bed for testing. Since the scanning bed at the test site is curved, inaccurate measurement results may occur due to inaccurate positioning during testing; at the same time, during the sensitivity test, due to the size of the acrylic plate mold and the aluminum sleeve, there may be a certain gap, which may cause the aluminum sleeve to sag under the action of gravity, resulting in inaccurate sensitivity testing. The above two reasons may cause misjudgment of the sensitivity and spatial resolution of PET.

[0003] In order to solve this problem, a new test phantom was designed, which consists of a base platform and an up-and-down moving component. The base platform is placed on the scanning bed and fixed by screws, and the up-and-down moving component is connected to the edge of the base platform, which solves the test error caused by inaccurate positioning. Utility Model Content

[0004] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the utility model is to provide a phantom which is convenient to operate, has strong adaptability, is stable in structure, and improves the test accuracy.

[0005] The utility model adopts the following technical scheme to achieve the above-mentioned purpose: a new phantom for testing PET sensitivity and spatial resolution, comprising a base platform, a probe seat, a rotating shaft seat, and an up-and-down moving assembly, wherein one side edge of the base platform is fixedly connected with a side plate, one side of the outer end of the side plate is fixedly connected with the up-and-down moving assembly, and the other side of the up-and-down moving assembly is fixedly connected with the rotating shaft seat, the probe seat is rotatably connected to the rotating shaft seat, and one end of the probe seat is provided with a movable bite. When in use, the base platform is installed on a scanning bed and is fixed after the screw rod is adjusted for balance. When testing spatial resolution, the test plate is fixed on the base platform and tested according to certain standards; when testing sensitivity, the test rod is fixed through the movable bite; the phantom can be adjusted in three directions of X, Y, and Z, and can move 10 cm in the positive direction of the Z direction and 10 cm in the positive and reverse directions of the Y direction, so as to meet the needs of PET equipment of different manufacturers and different models and realize detection control.

[0006] In one embodiment, a plurality of reinforcing plates are fixedly connected between the base platform and the side plates.

[0007] In one embodiment, the base platform includes an upper base plate and a lower base plate, one side edge of the upper base plate is fixedly connected to the side plate, a plurality of threaded holes are formed on the lower base plate, and a through hole is formed on the upper base plate opposite to the threaded holes, and the screws pass through the through holes and are threadedly connected in the threaded holes.

[0008] In one embodiment, the upper base plate and the lower base plate are two rectangular acrylic plates, and the length and width of the upper base plate are the same as the length and width of the lower base plate.

[0009] In one of the embodiments, the up and down moving assembly includes a fixed plate, a movable plate, a sliding rail, a bevel rack, and meshing teeth. One side of the fixed plate is fixedly connected to the pad plate, and the other end of the pad plate is fixedly connected to the side plate. Two symmetrical guide rail grooves are opened on the other side of the fixed plate, and the sliding rails are slidably connected in the guide rail grooves. The sliding rails are fixedly connected to the movable plate, and the helical rack is embedded and connected on the fixed plate between the two guide rail grooves. The other side of the movable plate is fixedly connected to a rotating shaft seat, and a probe seat is rotatably connected to the rotating shaft seat. Meshing teeth are fixedly connected to one side of the probe seat, and a slot hole is opened on the movable plate opposite to the meshing teeth. The meshing teeth mesh with the helical teeth on the bevel rack after passing through the slot hole.

[0010] Beneficial effects of the utility model:

[0011] 1. Improve test accuracy: Through the reasonable design of the base platform and the up and down moving components, the phantom can be accurately positioned, avoiding measurement errors caused by inaccurate positioning, thereby improving the accuracy of PET sensitivity and spatial resolution testing;

[0012] 2. Enhanced structural stability: The base platform and the side panels are fixedly connected by reinforcing plates, which improves the structural strength of the entire phantom, avoids deformation or loosening of the phantom during the test, and ensures the reliability of the test results;

[0013] 3. Flexibility and adaptability: The phantom can be adjusted in three directions: X, Y, and Z. In particular, it can move 10 cm in the positive direction of the Z direction and 10 cm in the positive and reverse directions of the Y direction, which can adapt to PET equipment of different manufacturers and models and meet various detection and control needs.

[0014] 4. Prevent the test rod from sagging: The test rod is fixed by the movable bite mouth to avoid the aluminum sleeve from sagging due to gravity, thus ensuring the accuracy of the sensitivity test;

[0015] 5. Easy operation: The design of the up and down moving components makes it easy to adjust and fix the height of the movable plate. Through the meshing action of the helical rack and the meshing teeth, the up and down displacement adjustment of the movable plate is realized, which is simple to operate and accurate in positioning;

[0016] Through the above improvements, the utility model overcomes the deficiencies in the prior art and provides a new PET sensitivity and spatial resolution test phantom with reasonable structure, comprehensive functions and precise testing, which is of great significance for improving the testing standardization and regularization of PET equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0019] Figure 3 This is a rear view structural diagram of the utility model;

[0020] Figure 4 This is a schematic diagram of the sliding rail connection structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the helical rack connection structure of the utility model.

[0022] In the figure: 100 base platform, 101 probe seat, 102 shaft seat, 103 up and down moving assembly, 104 side plate, 105 movable bite, 106 reinforcement plate, 200 fixed plate, 201 movable plate, 202 sliding rail, 203 oblique rack, 204 meshing teeth, 205 guide groove, 206 slot hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5A new phantom for testing PET sensitivity and spatial resolution includes a base platform 100, a probe seat 101, a rotating shaft seat 102, and an up-and-down moving assembly 103. A side edge of the base platform 100 is fixedly connected to a side plate 104, one side of the outer end of the side plate 104 is fixedly connected to the up-and-down moving assembly 103, and the other side of the up-and-down moving assembly 103 is fixedly connected to the rotating shaft seat 102. The rotating shaft seat 102 is rotatably connected to the probe seat 101, and one end of the probe seat 101 is provided with a movable bite 105, so that When in use, the base platform 100 is installed on the scanning bed and fixed after the screw is adjusted for balance. When testing the spatial resolution, the test plate is fixed on the base platform 100 and tested according to certain standards. When testing the sensitivity, the test rod is fixed by the movable bite 105. The model can be adjusted in three directions, X, Y, and Z, and can move 10 cm in the positive direction of the Z direction and 10 cm in the positive and reverse directions of the Y direction, so as to meet the needs of PET equipment from different manufacturers and different models and realize detection control.

[0025] In one embodiment, a plurality of reinforcing plates 106 are fixedly connected between the base platform 100 and the side plates 104 to improve the connection strength between the base platform 100 and the side plates 104 .

[0026] In one embodiment, the base platform 100 includes an upper base plate and a lower base plate. One side edge of the upper base plate is fixedly connected to the side plate 104. A plurality of threaded holes are provided on the lower base plate. A through hole is provided on the upper base plate opposite to the threaded holes. The screws pass through the through holes and are threadedly connected in the threaded holes to facilitate the relevant installation operations of the base platform 100.

[0027] In one embodiment, the upper base plate and the lower base plate are two rectangular acrylic plates, and the length and width of the upper base plate are the same as the length and width of the lower base plate, which are used to improve the sensitivity and spatial resolution test.

[0028] In one embodiment, the up and down moving component 103 includes a fixed plate 200, a movable plate 201, a sliding rail 202, a bevel rack 203, and a meshing tooth 204. One side of the fixed plate 200 is fixedly connected to the pad, and the other end of the pad is fixedly connected to the side plate 104. Two symmetrical guide rail grooves 205 are opened on the other side of the fixed plate 200, and the sliding rail 202 is slidably connected in the guide rail groove 205. The sliding rail 202 is fixedly connected to the movable plate 201. The bevel rack 203 is embedded and connected on the fixed plate 200 between the two guide rail grooves 205. The other side of the movable plate 201 is fixedly connected to the rotating shaft seat 102, and the rotating shaft seat 102 is rotatably connected to the probe seat 101. One side of the probe seat 101 is fixedly connected to the meshing tooth 204, and a slot hole 206 is opened on the movable plate 201 opposite to the meshing tooth 204. The meshing tooth 204 is engaged through the slot The hole 206 meshes with the helical teeth on the helical rack 203. When in use, the movable plate 201 and the base platform 100 on one side can be moved up and down through the activity restriction between the sliding rail 202 and the sliding guide groove, and the height of the movable plate 201 can be relatively fixed through the meshing action of the helical teeth on the cutting rack and the meshing teeth 204. When the movable plate 201 moves upward, it is movable and displaced through the oblique guide surfaces of the helical teeth and the meshing teeth 204. After stopping the activity, the movable plate 201 is under the action of gravity, and the lower ends of the helical teeth of the movable plate 201 are staggered and meshed with the meshing teeth 204, thereby preventing the movable plate 201 from moving downward. When it is necessary to adjust the movable plate 201 to move downward, the movable plate 201 can be flipped upward through the rotating shaft seat 102. At this time, the helical rack 203 and the meshing teeth 204 are separated, thereby adjusting the movable plate 201 to move downward.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new phantom for testing PET sensitivity and spatial resolution, comprising a base platform (100), a probe seat (101), a rotating shaft seat (102), and an up-and-down moving assembly (103), characterized in that: A side plate (104) is fixedly connected to one side edge of the base platform (100); one side of the outer end of the side plate (104) is fixedly connected to the up-and-down moving assembly (103); the other side of the up-and-down moving assembly (103) is fixedly connected to a rotating shaft seat (102); a probe seat (101) is rotatably connected to the rotating shaft seat (102); and a movable engaging opening (105) is provided at one end of the probe seat (101).

2. A new phantom for testing PET sensitivity and spatial resolution according to claim 1, characterized in that: A plurality of reinforcing plates (106) are fixedly connected between the base platform (100) and the side plates (104).

3. A new phantom for testing PET sensitivity and spatial resolution according to claim 1, characterized in that: The base platform (100) comprises an upper base plate and a lower base plate, one side edge of the upper base plate is fixedly connected to the side plate (104), a plurality of threaded holes are provided on the lower base plate, through holes are provided on the upper base plate opposite to the threaded holes, and screws pass through the through holes and are threadedly connected in the threaded holes.

4. A new phantom for testing PET sensitivity and spatial resolution according to claim 3, characterized in that: The upper base plate and the lower base plate are two rectangular acrylic plates, and the length and width of the upper base plate are the same as those of the lower base plate.

5. A new phantom for testing PET sensitivity and spatial resolution according to claim 1, characterized in that: The up-and-down moving assembly (103) comprises a fixed plate (200), a movable plate (201), a sliding rail (202), a bevel rack (203), and meshing teeth (204); one side of the fixed plate (200) is fixedly connected to a backing plate, and the other end of the backing plate is fixedly connected to a side plate (104); the other side of the fixed plate (200) is provided with two symmetrical guide rail grooves (205); a sliding rail (202) is slidably connected in the guide rail groove (205); the sliding rail (202) is fixedly connected to the movable plate (201); and the two guide rails (205) are fixedly connected to the movable plate (201). A bevel gear rack (203) is embedded and connected on the fixed plate (200) between the guide rail grooves (205); a rotating shaft seat (102) is fixedly connected to the other side of the movable plate (201); a probe seat (101) is rotatably connected to the rotating shaft seat (102); a meshing tooth (204) is fixedly connected to one side of the probe seat (101); a slot hole (206) is provided on the movable plate (201) opposite to the meshing tooth (204); the meshing tooth (204) meshes with the bevel gear on the bevel gear rack (203) after passing through the slot hole (206).

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