PET sensitivity measuring tool and PET sensitivity measuring system

Abstract

The utility model relates to a PET sensitivity measuring tool and a PET sensitivity measuring system. The tool comprises a mounting seat, a line source pipe and a sleeve, a plurality of clamping grooves which are sequentially communicated are formed in the mounting base in the first direction, the axes of all the clamping grooves coincide, and the hole diameters of all the clamping grooves are gradually increased in the first direction; the number of the sleeves corresponds to that of the clamping grooves, the inner diameters of the sleeves are different, and the sleeves are sequentially inserted into the corresponding clamping grooves, abut against the groove walls of the corresponding clamping grooves and are sequentially arranged in a sleeved mode. And the line source pipe is arranged in the clamping groove with the smallest aperture and extends into each clamping groove. The same sides of the sleeves are inserted into the corresponding clamping grooves and abut against the groove walls of the corresponding clamping grooves, so that the sleeves can be supported by the groove walls of the corresponding clamping grooves and are stably limited in the axial directions of the clamping grooves, the situation that the ends, away from the mounting base, of the sleeves bend and droop can be avoided, and the detection sensitivity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a PET sensitivity measurement tool and a PET sensitivity measurement system. Background Art

[0002] A key performance indicator in positron emission computed tomography (PET) technology is the sensitivity of the PET system. This system's sensitivity measures its ability to detect a specific radioactive source intensity. Higher sensitivity indicates a greater ability to detect radioactive sources. Highly sensitive PET systems can effectively reduce the injected dose while still achieving high-quality reconstructed images.

[0003] The PET sensitivity detection tooling currently in common use is equipped with multiple sleeves that are sequentially sleeved. One end of the sleeve is fixed. Since the sleeve has a certain length, the other end of the sleeve is prone to bending and sagging, which affects the detection sensitivity. Utility Model Content

[0004] Based on this, it is necessary to provide a PET sensitivity measurement tooling to address the technical problem that the PET sensitivity detection tooling in the existing technology is equipped with multiple sleeves that are sequentially sleeved, one end of the sleeve is fixed, and since the sleeve has a certain length, the other end of the sleeve is prone to bending and sagging, which affects the detection sensitivity.

[0005] A PET sensitivity measurement tool, comprising:

[0006] A mounting seat, wherein the mounting seat is provided with a plurality of slots connected in sequence in a first direction, the axes of the slots coincide with each other, and the apertures of the slots gradually expand in the first direction;

[0007] Sleeves are provided in a number corresponding to the number of the slots, and the inner diameters of the sleeves are different. The sleeves are sequentially inserted into the corresponding slots, abut against the slot walls of the corresponding slots, and are sequentially sleeved; and

[0008] The line source tube is installed in the one with the smallest aperture among the card slots and extends into each of the card slots.

[0009] In one embodiment, a step wall is formed between any two adjacent slots, and each step wall abuts against the corresponding sleeve.

[0010] In one embodiment, the PET sensitivity measurement tool further includes a fixing base, the fixing base is used to be connected to the bed, the mounting base is installed on the fixing base, and the mounting base is used to move synchronously with the fixing base under the drive of the bed.

[0011] In one embodiment, the fixing seat is provided with a fixing hole, the mounting seat is provided with a limiting wall, the mounting seat passes through the fixing hole and is connected to the fixing seat, and the limiting wall abuts against the fixing seat.

[0012] In one embodiment, the PET sensitivity measurement tool further includes a locking member, which is sleeved on the mounting seat and connected to the mounting seat, and the locking member abuts against a side of the fixing seat away from the limiting wall.

[0013] In one embodiment, the fixing seat includes a fixing plate, a support plate and a reinforcement block, the fixing plate is connected to the support plate, the support plate is used to be connected to the bed body, the fixing hole is provided on the fixing plate, and the reinforcement block is provided at the connection between the fixing plate and the support plate, and respectively abuts against the fixing plate and the support plate.

[0014] The utility model also provides a PET sensitivity measurement system, which can solve at least one of the above technical problems.

[0015] A PET sensitivity measurement system, a tube removal device and the above-mentioned PET sensitivity measurement tooling, wherein the tube removal device includes a clamping piece, and the clamping piece is used to clamp the outermost layer of the sleeve.

[0016] In one embodiment, the tube removal device further includes an air pump, the clamping member includes a first airbag arm and a second airbag arm, and the air pump is used to inflate the first airbag arm and the second airbag arm so that the first airbag arm and the second airbag arm abut against the outermost one of the sleeve.

[0017] In one embodiment, one end of the first airbag arm and the second airbag arm are connected, and the other ends of the first airbag arm and the second airbag arm are spaced apart to form a clamping groove between the first airbag arm and the second airbag arm.

[0018] In one embodiment, the tube removal device further includes a buffer pad, which is located below the clamping member and is used to receive the sleeve.

[0019] Beneficial effects:

[0020] The PET sensitivity measurement tool provided by the embodiment of the present invention includes a mounting base, a line source tube and a sleeve; the mounting base is provided with a plurality of slots connected in sequence in a first direction, the axes of the slots all coincide, and the apertures of the slots gradually expand in the first direction; the sleeves are arranged in a corresponding number to the slots, and the inner diameters of the sleeves are different. Each sleeve is sequentially inserted into the corresponding slot and abuts against the slot wall of the corresponding slot and is sequentially sleeved; the line source tube is installed in the slot with the smallest aperture and extends into each slot. The present application collects multiple data by adding or removing tubes to simulate different attenuation conditions by sequentially sleeved each sleeve and all sleeved on the line source tube. Since the same side of each sleeve is inserted into the corresponding slot and abuts against the slot wall of the corresponding slot, the side of each sleeve close to the mounting base can be supported by the slot wall of the corresponding slot and stably limited in the axial direction of the slot, thereby preventing the sleeve from bending and sagging at the end away from the mounting base, thereby improving the detection sensitivity. Among them, the present application provides multiple slots in the mounting seat to support and limit each sleeve. The thickness of the slot wall of each slot is not restricted. It is only necessary to increase the radial size of the mounting seat in the slot, so that the slot wall of each slot is not easy to deform and has sufficient thickness to support the sleeve, thereby improving the coaxiality of each sleeve.

[0021] The present invention also provides a PET sensitivity measurement system, comprising a tube removal device and the aforementioned PET sensitivity measurement tool. The tube removal device includes a clamping member for clamping the outermost layer of the sleeve. The PET sensitivity measurement system can achieve at least one of the aforementioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of a mounting base in a PET sensitivity measurement tool provided in one embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the cooperation between the PET sensitivity measurement tooling and the bed provided in one embodiment of the present utility model.

[0024] Figure 3 This is a front view of a PET sensitivity measurement tool provided by one embodiment of the present utility model.

[0025] Figure 4 This is a schematic diagram of the cooperation between the fixing seat and the bed in the PET sensitivity measurement tool provided by one embodiment of the present invention.

[0026] Figure 5 This is a structural diagram of a PET sensitivity measurement system provided in one embodiment of the present utility model.

[0027] Figure 6 This is a structural diagram of the tube removal device in the PET sensitivity measurement system provided by one embodiment of the present invention.

[0028] Figure Number:

[0029] 100-mounting seat; 121-slot; 122-step wall; 130-limiting wall; 140-first section; 150-second section; 160-locking piece; 200-source tube; 300-sleeve; 400-fixing seat; 410-fixing hole; 420-fixing plate; 430-support plate; 440-reinforcement block; 450-fastener; 500-tube removal device; 510-clamping piece; 511-first airbag arm; 512-second airbag arm; 513-clamping groove; 520-air pump; 530-support frame; 540-cushion; 600-bed. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] See Figure 1 、 Figure 2 and Figure 3 , Figure 1 A cross-sectional view of a mounting base in a PET sensitivity measurement tool provided in one embodiment of the present invention. Figure 2 This is a schematic diagram of the cooperation between the PET sensitivity measurement tooling and the bed provided in one embodiment of the present utility model. Figure 3This is a front view of a PET sensitivity measurement tool provided by an embodiment of the present invention. The PET sensitivity measurement tool provided by this embodiment of the present invention includes a mounting base 100, a line source tube 200, and a sleeve 300. The mounting base 100 is provided with a plurality of slots 121 connected in sequence along a first direction. The axes of the slots 121 coincide with each other, and the apertures of the slots 121 gradually expand in the first direction. The sleeves 300 are arranged in a corresponding number to the slots 121, and the inner diameters of the sleeves 300 are different. Each sleeve 300 is sequentially inserted into the corresponding slot 121, abutting against the slot wall of the corresponding slot 121, and then sleeved in sequence. The line source tube 200 is installed in the slot with the smallest aperture 121 and extends into each sleeve 300.

[0037] Specifically, in positron emission computed tomography (PET) technology, the sensitivity of the PET system is an important performance indicator. In this application, the sleeves 300 are sequentially installed, and are all installed on the line source tube 200, so as to collect various data by adding or removing tubes to simulate different attenuation conditions. Since the same side of each sleeve 300 is inserted into the corresponding slot 121 and abuts against the slot wall of the corresponding slot 121, the side of each sleeve 300 close to the mounting base 100 can be supported by the slot wall of the corresponding slot 121 and stably limited in the axial direction of the slot 121, thereby preventing the sleeve 300 from bending and sagging at the end away from the mounting base 100, thereby improving the detection sensitivity. Preferably, the sleeve 300 in this embodiment is an aluminum tube.

[0038] Among them, the present application sets multiple slots 121 in the mounting seat 100 to support and limit each sleeve 300. The thickness of the slot wall of each slot 121 is not restricted, that is, it is only necessary to increase the radial size of the mounting seat 100 in the slot 121, so that the slot wall of each slot 121 has sufficient thickness and is not easy to deform, and can stably support the sleeve 300 to improve the coaxiality of each sleeve 300.

[0039] It should be noted that the first direction is unidirectional and parallel to the axis of each slot 121. The source tube 200 is used to install the radiation source, and the slot 121 with the smallest aperture is a through slot, which facilitates the installation of the source tube 200.

[0040] It should be noted that sensitivity refers to the count rate of coincident events captured by a PET acquisition device under a given radiation source intensity. Since the annihilation of positrons emitted by a radiation source produces a pair of gamma rays, information such as the energy, position, and timing of the captured gamma rays is used for image reconstruction. Therefore, the radiation source must be surrounded by a large amount of material to ensure the occurrence of this annihilation process. However, photons emitted from the same point source will attenuate when passing through different media, increasing the data error caused by attenuation, making it difficult to perform measurements without attenuation effects during detection. To obtain measurement data without attenuation effects, a standard line source surrounded by a controllable and measurable absorber is required. The count rate of the standard line source with absorbers of different thicknesses can be used to derive the sensitivity of the PET system without the absorber. In this embodiment, the absorber is a cannula 300, and various data are collected by adding or removing tubes to simulate different attenuation conditions.

[0041] It should be noted that the thickness of each sleeve 300 is the same, and the difference in radial dimensions between adjacent sleeves 300 is the same.

[0042] See Figure 1 In one embodiment, a step wall 122 is formed between any two adjacent slots 121 , and each step wall 122 abuts against the corresponding sleeve 300 .

[0043] Specifically, in the first direction, the aperture of each slot 121 gradually expands, and a step wall 122 is formed between adjacent slots 121. Each step wall 122 abuts against the corresponding sleeve 300, thereby limiting the movement of the sleeve 300 in a direction opposite to the first direction. At the same time, the contact area between the outer wall of the sleeve 300 and the groove wall of the corresponding slot 121 is ensured, thereby improving the stability of the sleeve 300.

[0044] Furthermore, in the radial direction of the slot 121 , the sizes of the step walls 122 are the same, so that there is the same gap between adjacent sleeves 300 .

[0045] Furthermore, in the axial direction of the slots 121, the slot walls of each slot 121 are the same length, thereby providing the same support and limiting effect to each sleeve 300, thereby improving reliability. Preferably, the number of the slots 121 in this embodiment is 4, and other numbers are also possible.

[0046] See Figure 1 In one embodiment, the thickness of the groove wall of each slot 121 is greater than the radius of the largest aperture in the slot 121, so that the groove wall of each slot 121 has sufficient thickness, thereby not easily deformed, stably supporting and limiting the sleeve 300, so as to improve the coaxiality of each sleeve 300.

[0047] See Figure 1 、 Figure 2 and Figure 3 In one embodiment, the PET sensitivity measurement tooling further includes a fixing base 400 , which is used to be connected to the bed 600 , and the mounting base 100 is installed on the fixing base 400 , which is used to move synchronously with the fixing base 400 driven by the bed 600 .

[0048] Specifically, in the present application, the movement of the bed 600 drives the movement of the mounting seat 100 and the fixing seat 400, thereby realizing sensitivity testing in different axial ranges, so that the PET sensitivity measurement tooling can adapt to the sensitivity measurement of the long-axis system.

[0049] It should be noted that the PET system includes a bed 600 that supports the subject to be examined and can move the subject to be examined along the axial direction of the slot 121. The bed 600 is provided with a headrest interface, and the fixed base 400 has an insert that plugs into the headrest interface to mount the fixed base 400 on the bed 600.

[0050] Furthermore, there are two mounting seats 100, and the two mounting seats 100 are spaced apart in the vertical direction, one mounting seat 100 is installed at the center position (center position of the field of view), and the other mounting seat 100 is installed at an eccentric position (with a distance from the center of the field of view), and the sleeve 300 is installed on the two mounting seats 100 respectively for data collection.

[0051] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 4 A schematic diagram illustrating the coordination between the fixing base and the bed in a PET sensitivity measurement tool provided in one embodiment of the present invention. In one embodiment, the fixing base 400 is provided with a fixing hole 410, and the mounting base 100 is provided with a limiting wall 130. The mounting base 100 is inserted through the fixing hole 410 and connected to the fixing base 400, and the limiting wall 130 abuts the fixing base 400.

[0052] Specifically, the end of the mounting seat 100 away from the sleeve 330 is passed through the fixing hole 410. Through the setting of the limiting wall 130, when the mounting seat 100 is partially passed through the fixing hole 410, the limiting wall 130 can abut against the fixing seat 400, and can limit the installation position of the mounting seat 100 to ensure that it is installed in place.

[0053] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4In one embodiment, the PET sensitivity measurement tool further includes a locking member 160 , which is sleeved on the mounting base 100 and connected to the mounting base 100 , and the locking member 160 abuts against a side of the fixing base 400 away from the limiting wall 130 .

[0054] Specifically, the locking member 160 is threadedly connected to the mounting base 100 and cooperates with the limiting wall 130 to make the locking member 160 press against the mounting base 100, reduce the shaking of the mounting base 100, and improve the stability of the mounting base 100, thereby preventing the sleeve 300 from sagging away from one end of the mounting base 100.

[0055] Furthermore, the mounting base 100 includes a first section 140 and a second section 150, wherein the radial dimension of the second section 150 is larger than that of the first section 140. Among the slots 121, the one with the smallest aperture is located on the first section 140, and the remaining slots 121 are located on the second section 150. The limiting wall 130 is located on the step wall 122 between the first section 140 and the second section 150. This ensures that the step wall 122 stably abuts against the fixing base 400 while ensuring that the slot wall of each slot 121 has sufficient thickness.

[0056] See Figure 2 、 Figure 3 and Figure 4 In one embodiment, the fixing seat 400 includes a fixing plate 420, a support plate 430 and a reinforcement block 440. The fixing plate 420 is connected to the support plate 430. The support plate 430 is used to be connected to the bed body 600. The fixing hole 410 is set on the fixing plate 420. The reinforcement block 440 is set at the connection between the fixing plate 420 and the support plate 430, and is respectively in contact with the fixing plate 420 and the support plate 430.

[0057] Specifically, the insert block is provided on the support plate 430. The reinforcing block 440 is provided at the connection between the fixing plate 420 and the support plate 430, and abuts against the fixing plate 420 and the support plate 430 respectively, thereby maintaining the angle between the fixing plate 420 and the support plate 430. Therefore, after the support plate 430 is connected to the bed 600, the fixing plate 420 is kept stable in its current posture, thereby preventing the extension angle of the sleeve 300 on the mounting seat 100 from changing and sagging, thereby affecting the detection sensitivity.

[0058] Furthermore, the sleeve 300 extends in the horizontal direction, the fixing plate 420 extends in the vertical direction, the support plate 430 extends in the horizontal direction, and the reinforcement block 440 is connected to the fixing plate 420 and the support plate 430 respectively through fasteners 450 such as screws.

[0059] See Figure 1 、 Figure 2 、 Figure 3 and Figure 5 , Figure 5 This is a structural diagram of a PET sensitivity measurement system provided in one embodiment of the present invention. This embodiment of the present invention also provides a PET sensitivity measurement system, comprising a tube removal device 500 and the aforementioned PET sensitivity measurement tooling. The tube removal device 500 includes a clamping member 510 for clamping the outermost layer of the sleeve 300.

[0060] Specifically, the mounting base 100 is installed on the bed 600 through the fixing base 400, and the mounting base 100 is driven to move by the bed 600 so that the sleeve 300 is located at a preset position. The clamping member 510 clamps one of the sleeves 300 located at the outermost layer, and then the mounting base 100 is driven to move by the bed 600 so that the outermost sleeve 300 is separated from the mounting base 100, thereby realizing automatic tube reduction, thereby reducing the multiple picking and placing operations when replacing the sleeve 300 in the prior art and reducing the radiation dose received by the technician.

[0061] It should be noted that the data acquisition sequence is as follows: with all cannulas 300 installed in the mounting base 100, the first set of data is acquired; the outermost cannulas 300 are removed by the cannula removal device 500, and the second set of scan data is acquired; this process repeats until the last layer of cannulas 300 remains, acquiring multiple sets of scan data. This embodiment uses five cannulas 300 as an example, but the present invention is not limited to this. The principle of PET sensitivity measurement is conventional and will not be further described in this embodiment.

[0062] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 , Figure 6 A structural diagram of a tube removal device in a PET sensitivity measurement system according to one embodiment of the present invention. In one embodiment, the tube removal device 500 further includes an air pump 520. The clamping member 510 includes a first airbag arm 511 and a second airbag arm 512. The air pump 520 is used to inflate the first airbag arm 511 and the second airbag arm 512 so that the first airbag arm 511 and the second airbag arm 512 abut against the outermost layer of the cannula 300.

[0063] Specifically, when the bed 600 drives the cannula 300 to move between the first airbag arm 511 and the second airbag arm 512, the air pump 520 inflates the first airbag arm 511 and the second airbag arm 512, causing them to expand and abut against the outermost layer of the cannula 300. As the first airbag arm 511 and the second airbag arm 512 continue to expand, they can clamp the outermost layer of the cannula 300, thereby separating the outermost layer of the cannula 300 from the mounting base 100 when the bed 600 moves away from the cannula removal device 500. The degree of expansion of the first airbag arm 511 and the second airbag arm 512 can be adjusted to accommodate cannula 300 of different diameters.

[0064] It should be noted that since the first airbag arm 511 and the second airbag arm 512 contain gas, the first airbag arm 511 and the second airbag arm 512 can produce a large deformation when clamping the sleeve 300, thereby increasing the contact area with the sleeve 300 and improving the clamping stability, while also reducing damage to the sleeve 300 and improving the reliability of the PET sensitivity measurement system.

[0065] In other embodiments, the clamping member 510 includes a first clamping arm and a second clamping arm, and the driving member drives the first clamping arm and the second clamping arm to approach each other to clamp the outermost layer of the sleeve 300 .

[0066] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 In one embodiment, one end of the first airbag arm 511 and the second airbag arm 512 are connected, and the other ends of the first airbag arm 511 and the second airbag arm 512 are spaced apart to form a clamping groove 513 between the first airbag arm 511 and the second airbag arm 512.

[0067] Specifically, the first airbag arm 511 and the second airbag arm 512 are arranged at an angle, and the clamping groove 513 is a V-shaped groove, thereby increasing the contact area with the sleeve 300 and improving the clamping stability.

[0068] Furthermore, the clamping member 510 is disposed above the mounting seat 100 , and the bed 600 can also drive the mounting seat 100 to move upward, thereby clamping the sleeve 300 more stably.

[0069] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6In one embodiment, the tube removal device 500 further includes a buffer pad 540 , which is located below the clamping member 510 and is used to receive the casing 300 .

[0070] Specifically, the first and second airbag arms 511 and 512 are connected to each other at their ends away from the cushion 540. When the bed 600 drives the mounting base 100 to move, separating the outermost sleeve 300 from the mounting base, the first and second airbag arms 511 and 512 are deflated, causing them to contract and release the sleeve 300. The cushion 540 is provided to catch the dropped sleeve 300 at the lower end of the clamp 510, thereby protecting it.

[0071] Furthermore, the tube removal device 500 further includes a support frame 530 , the support member is located on a side away from the bed 600 , and the air pump 520 , the first airbag arm 511 and the second airbag arm 512 are installed on the support frame 530 .

[0072] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A PET sensitivity measurement tool, characterized in that: The PET sensitivity measurement tool comprises: A mounting seat (100), wherein the mounting seat (100) is provided with a plurality of slots (121) connected in sequence in a first direction, the axes of the slots (121) are coincident, and in the first direction, the apertures of the slots (121) gradually expand; The sleeves (300) are arranged in a number corresponding to the number of the card slots (121), and the inner diameters of the sleeves (300) are different. The sleeves (300) are sequentially inserted into the corresponding card slots (121), abut against the groove walls of the corresponding card slots (121), and are sequentially sleeved; and, The line source tube (200) is installed in the smallest aperture of the slots (121) and extends into each of the sleeves (300).

2. The PET sensitivity measurement tool according to claim 1, characterized in that: A step wall (122) is formed between any two adjacent slots (121), and each step wall (122) abuts against the corresponding sleeve (300).

3. The PET sensitivity measurement tool according to claim 1, characterized in that: The PET sensitivity measurement tool further comprises a fixing seat (400), the fixing seat (400) being used to be connected to the bed (600), the mounting seat (100) being mounted on the fixing seat (400), and the mounting seat (100) being used to move synchronously with the fixing seat (400) under the drive of the bed (600).

4. The PET sensitivity measurement tool according to claim 3, characterized in that: The fixing seat (400) is provided with a fixing hole (410), the mounting seat (100) is provided with a limiting wall (130), the mounting seat (100) is passed through the fixing hole (410) and is connected to the fixing seat (400), and the limiting wall (130) abuts against the fixing seat (400).

5. The PET sensitivity measurement tool according to claim 4, characterized in that: The PET sensitivity measurement tool further includes a locking member (160), which is sleeved on the mounting seat (100) and connected to the mounting seat (100), and the locking member (160) abuts against a side of the fixing seat (400) facing away from the limiting wall (130).

6. The PET sensitivity measurement tool according to claim 4, characterized in that: The fixing seat (400) comprises a fixing plate (420), a support plate (430) and a reinforcement block (440); the fixing plate (420) is connected to the support plate (430); the support plate (430) is used to be connected to the bed body (600); the fixing hole (410) is provided on the fixing plate (420); the reinforcement block (440) is provided at the connection between the fixing plate (420) and the support plate (430), and is respectively in contact with the fixing plate (420) and the support plate (430).

7. A PET sensitivity measurement system, characterized in that: The invention comprises a tube removal device (500) and the PET sensitivity measurement tool as claimed in any one of claims 1 to 6, wherein the tube removal device (500) comprises a clamping member (510), and the clamping member (510) is used to clamp one of the outermost layers of the sleeve (300).

8. The PET sensitivity measurement system according to claim 7, characterized in that: The tube removal device (500) further includes an air pump (520), the clamping member (510) includes a first air bag arm (511) and a second air bag arm (512), and the air pump (520) is used to inflate the first air bag arm (511) and the second air bag arm (512) so that the first air bag arm (511) and the second air bag arm (512) abut against one of the outermost layers of the sleeve (300).

9. The PET sensitivity measurement system according to claim 8, characterized in that: One end of the first airbag arm (511) and the second airbag arm (512) are connected, and the other ends of the first airbag arm (511) and the second airbag arm (512) are spaced apart to form a clamping groove (513) between the first airbag arm (511) and the second airbag arm (512).

10. The PET sensitivity measurement system according to claim 7, characterized in that: The tube removal device (500) further comprises a buffer pad (540), wherein the buffer pad (540) is located below the clamping member (510), and the buffer pad (540) is used to receive the sleeve (300).

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