Coil device and detection system for detecting the concentration of radioactive fluids.

Abstract

This invention relates to a coil device and detection system for detecting the concentration of radioactive fluids. The coil device includes: an inner support frame with a recessed detection area; and a concentration detection conduit wound around the detection area. The concentration detection conduit includes a spiral detection conduit and barrier conduits connected to both ends of the spiral detection conduit. The barrier conduits extend out of the inner support frame, and the spiral detection conduit surrounds the detection area. The spiral detection conduit transmits the radioactivity of the radioactive fluid, and the barrier conduits block the radioactivity of the radioactive fluid. The inner support frame supports and fixes the concentration detection conduit, effectively maintaining the accuracy of its overall shape and dimensions. The barrier conduits are wrapped externally to prevent radioactive interference from other radioactive fluids. Radioactivity can only be detected at the spiral detection conduit, resulting in accurate detection range and fluid flow rate, high detection precision, and accurate delivery dose.

Description

Technical Field

[0001] This invention relates to the field of medical technology, and in particular to a coil device and detection system for detecting the concentration of radioactive fluids. Background Technology

[0002] In some medical devices used for human detection, patients need to be injected with a small dose of radioactive fluid for target imaging. The radioactive fluid needs to be automatically dispensed by the detection system to meet the detection requirements of different target objects. Because individual body sizes vary, the required dosage also varies. Since radioactive fluids can cause harm to the human body, the minimum dose injected is used while still meeting imaging requirements. Therefore, determining the appropriate dosage and activity range of the radioactive fluid is crucial; excessive doses can severely damage the target's health, while insufficient doses will prevent effective imaging.

[0003] Chinese patent CN102886100B discloses an apparatus for distributing radioactive liquid to a destination, comprising: a first valve device; a fluid delivery conduit for fluid to flow from the first valve device to the destination; a measuring section connected to the fluid delivery conduit; and a radioactivity measuring device operable to determine the radioactivity concentration in a vial within a device within the system; wherein, upon the entry of the radioactive liquid into the measuring section, the radioactivity measuring device determines the radioactivity level within the measuring section of the fluid delivery conduit; wherein the volume of radioactive liquid for the total radioactivity quantity is determined based on the radioactivity concentration in the vial within the device within the system; the first valve device is adapted to selectively connect a source of the radioactive liquid and a source of flushing liquid to the fluid delivery conduit upstream of the measuring section and is regulated to deliver the total radioactivity quantity; wherein the measuring section is capable of maintaining a volume of at least one quantity of radioactive liquid from the source of the radioactive liquid.

[0004] The aforementioned radiation measuring device cannot determine the specific dose value injected, and the tubing outside the radiation measuring device can easily affect the accuracy of the measurement, resulting in substandard or excessive doses. Therefore, improvements are needed. Summary of the Invention

[0005] To overcome the problems existing in related technologies, embodiments of the present invention provide a coil device and detection system for detecting the concentration of radioactive fluids.

[0006] A coil device for conveying radioactive fluid concentration detection according to an embodiment of the present invention includes:

[0007] The internal support bracket has a recessed detection area.

[0008] A concentration detection pipeline wound around the detection area, the concentration detection pipeline including a spiral detection pipeline and a blocking pipeline respectively connected to both ends of the spiral detection pipeline, the blocking pipeline passing through the inner support bracket, the spiral detection pipeline surrounding the detection area, wherein the spiral detection pipeline is a pipeline that transmits the radioactivity of the radioactive fluid, and the blocking pipeline is a pipeline that blocks the radioactivity of the radioactive fluid.

[0009] In one embodiment, the barrier conduit includes a flow guide and a barrier layer enclosing the flow guide, the barrier layer being made of a material that blocks the radioactivity of the radioactive fluid.

[0010] In one embodiment, the barrier layer includes a base film layer and at least one silver plating layer coated on the surface of the base film layer, the silver plating layer being attached to the guide tube.

[0011] In one embodiment, the projections of the barrier layer end faces at both ends of the spiral detection conduit onto a plane perpendicular to the centerline of the spiral detection conduit coincide.

[0012] In one embodiment, the spiral detection conduit includes two or more spiral conduits wound around the detection area, wherein the volume of the radioactive fluid in the spiral detection conduit is:

[0013] V = 2π 2 r 2 ·(R+r)·Int(L / 2r), where R is the radius of the detection zone; r is the radius of the spiral conduit; and L is the axial length of the spiral detection conduit.

[0014] In one embodiment, the two ends of the spiral detection conduit are provided with throttling rings that are recessed toward the center of the spiral conduit, and the blocking conduit intersects with the throttling rings.

[0015] In one embodiment, the inner support bracket includes an installation end located at one end of the detection area and a positioning end located at the other end of the detection area. The installation end is provided with an installation groove, one end of the blocking pipe is confined within the installation groove, the positioning end is provided with a positioning hole, and the other end of the blocking pipe passes through the inner support bracket along the positioning hole and exits from the installation end.

[0016] In one embodiment, the surface of the detection area is coated with a silver plating layer.

[0017] The present invention also discloses a detection system, including a controller, a radiopharmaceutical source, a first drive pump connected to the radiopharmaceutical source, a concentration-ratio solution, a second drive pump connected to the concentration-ratio solution, a first three-way valve, a radioactive concentration detector, a second three-way valve, a waste liquid collector, an output mechanism, and a coil device as described above. The coil device is inserted into the radioactive concentration detector, the detection area corresponds to the detection part of the radioactive concentration detector, the inner support bracket covers the opening of the radioactive concentration detector, the first drive pump and the second drive pump are respectively connected to the first three-way valve, the coil device, the output mechanism and the waste liquid collector are respectively connected to the second three-way valve, and the controller is electrically connected to the first drive pump, the second drive pump, the first three-way valve, the radioactive concentration detector and the second three-way valve.

[0018] In one embodiment, the centerline of the detection area coincides with the centerline of the radioactivity concentration detector.

[0019] The technical solutions provided by the embodiments of the present invention can include the following beneficial effects: the internal support bracket supports and fixes the concentration detection pipeline, effectively maintaining the accuracy of the overall shape and size. The barrier pipeline is wrapped externally to prevent radioactive interference from other radioactive fluids, and radioactivity can only be detected at the spiral detection pipeline, resulting in accurate detection range and fluid flow rate, high detection accuracy, and precise delivery dose.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] Figure 1 This is a schematic diagram illustrating the structure of a coil device within a radioactivity concentration detector according to an exemplary embodiment.

[0023] Figure 2 This is a three-dimensional structural schematic diagram of a coil device according to an exemplary embodiment.

[0024] Figure 3 This is a side view of a coil assembly according to an exemplary embodiment.

[0025] Figure 4 This is an enlarged structural schematic diagram of a concentration detection pipeline according to an exemplary embodiment.

[0026] Figure 5 This is a top view schematic diagram of a coil device according to an exemplary embodiment.

[0027] Figure 6 This is a cross-sectional structural schematic diagram of a coil assembly according to an exemplary embodiment.

[0028] Figure 7 This is a schematic diagram of a detection system according to an exemplary embodiment.

[0029] In the figure, the following components are included: concentration detection pipeline 10; spiral detection pipeline 11; barrier pipeline 12; barrier layer 121; guide pipe 122; throttling ring 123; internal support bracket 20; detection area 21; mounting end 22; positioning end 23; mounting groove 24; radioactive concentration detector 30; controller 40; radioactive drug source 50; concentration ratio solution 60; stirrer 70; waste liquid collector 80; first drive pump 90; second drive pump 91; first three-way valve 92; second three-way valve 93. Detailed Implementation

[0030] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0031] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they 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, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] like Figures 1 to 3As shown, the present invention provides a coil device for detecting the concentration of radioactive fluid. The coil device includes an inner support 20 and a concentration detection pipeline 10 wound around the inner support 20. The coil device constitutes an integral component used in the detection system.

[0034] The inner support bracket 20 is a structural component with a stable shape. The inner support bracket 20 is provided with a recessed detection area 21, which is recessed from the surface of the inner support bracket 20 to form an annular groove structure. The detection area 21 is used to cooperate with the concentrated detection area 21 of the radioactivity concentration detector 30 for detection, and the concentration of radioactive fluid is determined based on the activity range of the radioactive fluid within the detection area 21.

[0035] The concentration detection tubing 10 is wound around the detection area 21 so that the corresponding tubing located in the detection area 21 can be detected by the radioactivity concentration detector 30, while other tubing will not be detected by the radioactivity concentration detector 30, reducing interference and improving detection accuracy. The inner support bracket 20 supports and fixes the concentration detection tubing 10, effectively maintaining the accuracy of the overall shape and size.

[0036] Specifically, the concentration detection line 10 includes a spiral detection line 11 and barrier lines 12 connected to both ends of the spiral detection line 11. The barrier lines 12 extend out of the inner support frame 20, and the spiral detection line 11 surrounds the detection area 21. The spiral detection line 11 transmits the radioactivity of the radioactive fluid, while the barrier lines 12 block the radioactivity of the radioactive fluid. The barrier lines 12 are located at both the input and output ends of the spiral detection line 11, effectively preventing the radioactive fluid from causing radioactive output interference in other areas of the inner support frame 20. Furthermore, the barrier lines 12 are confined within the inner support frame 20, ensuring accurate structural positioning. The barrier lines 12 enclose the outer portion to prevent radioactive interference from other radioactive fluids, ensuring that the radioactivity of the radioactive fluid can only be detected at the spiral detection line 11. This results in accurate detection range and flow rate, high detection precision, and accurate delivery dose.

[0037] Preferably, the barrier pipe 12 is provided with a quick-connect fitting at the point where it exits the inner support bracket 20. This quick-connect fitting is used to connect to other pipes that transmit radioactive fluids to achieve a rapid connection. Preferably, the end of the quick-connect fitting is provided with an annular protruding snap-fit ​​rib to improve the tightness and reliability of the pipe connection.

[0038] The barrier conduit 12 can be a tubular structure made of barrier material, which can guide the flow of radioactive fluid, thereby blocking or reducing external radioactivity. Preferably, the barrier conduit 12 is a barrier film structure wrapped around the conduit, so that the conduit outputs projection properties in a designated area, which facilitates the flexible setting of the radioactive area.

[0039] In one embodiment, the barrier conduit 12 includes a flow guide 122 and a barrier layer 121 wrapping around the flow guide 122. The barrier layer 121 is made of a material that blocks the radioactivity of the radioactive fluid. The flow guide 122 and the spiral detection conduit 11 are continuous conduits to form a continuous flow guiding structure. The barrier layer 121 wraps around the flow guide 122 to block or reduce the radioactivity of the radioactive fluid inside the flow guide 122, thereby reducing its external impact. Preferably, the barrier layer 121 uses a multi-layer membrane structure wrapped around the flow guide 122 to form a radioactivity barrier in a designated area of ​​the conduit, resulting in a good barrier effect.

[0040] The barrier layer 121 has a multilayered coating structure, wherein one or more barrier media can be coated on the surface of the flexible base film to improve the barrier effect. For example, the barrier layer 121 is an ethylene-octene copolymer film layer containing tungsten powder; the barrier layer 121 is a silver-plated coating; the barrier layer 121 is a polymer containing metal salt nanogel, etc.

[0041] In an optional embodiment, the barrier layer 121 includes a base film layer and at least one silver plating layer coated on the surface of the base film layer, the silver plating layer being attached to the guide tube 122. The surface of the base film layer is coated with at least one silver plating layer, which wraps around the wall of the guide tube 122, thereby reducing and blocking the radioactivity of the radioactive fluid projected out of the guide tube 122.

[0042] like Figures 3 to 6 As shown, in one embodiment, the projections of the end faces of the barrier layers 121 at both ends of the spiral detection conduit 11 onto a plane perpendicular to the centerline of the spiral detection conduit 11 coincide. The barrier layers 121 are wound around the guide tube 122 and form end faces at the end faces of the spiral detection conduit 11. The spiral detection conduit 11 has a spiral structure, and its centerline is the center of the spiral. The projection of the spiral detection conduit 11 onto a plane perpendicular to the centerline is annular. The barrier layers 121 form end faces at both ends of the spiral detection conduit 11, and the end faces of the two barrier layers 121 coincide, so that the size of the spiral detection conduit 11 within the detection area 21 is a complete loop structure. This improves the accuracy of the volume calculation of the radioactive fluid within the spiral detection conduit 11 and greatly improves the accuracy of the radioactivity concentration calculation detected by the radioactivity concentration detector 30.

[0043] In one embodiment, the spiral detection conduit 11 includes two or more turns of spiral conduit wound around the detection area 21, wherein the volume of the radioactive fluid in the spiral detection conduit 11 is:

[0044] V = 2π 2 r 2·(R+r)·Int(L / 2r), where R is the radius of the detection zone 21; r is the radius of the spiral conduit; and L is the axial length of the spiral detection conduit 11. The fluid volume in the spiral detection conduit 11 needs to be precisely calculated to ensure that the activity range of the radioactive fluid within the volume range meets the injection requirements, and that the injection volume also meets the two adjustment requirements. The tabular parameters between the activity range and volume can be found in Table 1.

[0045] Serial Number Activity range / mbq L range / mm r range / mm R range / mm 1 25-125 20±5 2±1 15±3 2 125-250 20±5 2±1 15±3 3 250-500 30±5 3±1 20±3 4 500-1000 40±5 3±1 25±3 5 1000-1500 40±5 5±1 30±3

[0046] Furthermore, both ends of the spiral detection conduit 11 are provided with throttling rings 123 that are recessed towards the center of the spiral conduit, preventing the conduit 12 from intersecting with the throttling rings 123. The throttling rings 123 are groove-shaped structures with locally reduced cross-sections distributed at both ends of the spiral detection conduit 11. The throttling rings 123 are distributed at both ends of the spiral detection conduit 11, thereby limiting the accurate calculated capacity within the spiral detection conduit 11, reducing external interference, and improving the accuracy of the detected radioactivity range. Preferably, the throttling rings 123 are configured as one or more annular groove structures to form a multi-point cutoff structure, resulting in a good throttling effect.

[0047] The spiral detection tube 11 has a helical structure and is wound around the surface of the inner support bracket 20. The spiral detection tube 11 has two or more turns. For example, the spiral detection tube 11 has three, four, five, or six turns. Preferably, there is a radial gap between adjacent turns of the spiral tube, which is less than or equal to half the diameter of the spiral tube. Optionally, the spiral detection tube 11 is a rigid tube structure, such as a glass tube or plastic tube, to provide a stable tubular structure. Optionally, the spiral detection tube 11 is a flexible tube structure, wound around the inner support bracket 20 for easy winding processing.

[0048] In one embodiment, the inner support bracket 20 includes a mounting end 22 located at one end of the detection area 21 and a positioning end 23 located at the other end of the detection area 21. The inner support bracket 20 is a single piece or a combination of two or more pieces. The detection area 21 has a columnar structure, with the detection area 21 and the positioning end 23 located at opposite ends of the detection area 21. The mounting end 22 and the positioning end 23 extend beyond the detection area 21 to form a flange boss structure. The positioning end 23 is inserted into the radioactivity concentration detector 30 and positioned with the radioactivity concentration detector 30 to determine the detection angle and detection range. The mounting end 22 covers the opening area of ​​the radioactivity concentration detector 30 and guides the barrier pipe 12 through the radioactivity concentration detector 30.

[0049] The mounting end 22 is provided with a mounting groove 24, and one end of the blocking pipe 12 is confined within the mounting groove 24. The mounting groove 24 is located on the side wall of the mounting end 22, and the blocking pipe 12 is embedded in the mounting groove 24 and extends out along the mounting groove 24.

[0050] The positioning end 23 is provided with a positioning hole, and the other end of the barrier pipe 12 passes through the positioning hole through the inner support bracket 20 and exits from the mounting end 22. The positioning hole passes through the inner support bracket 20 so that the barrier pipe 12 enters into the inner support bracket 20 and exits from the mounting end 22. The barrier pipe 12 is located inside the inner support bracket 20, thereby further reducing the radioactive impact of the radioactive fluid flowing in the barrier pipe 12 on the surrounding environment and reducing the impact of the radioactive fluid in the barrier pipe 12 on the detection accuracy of the radioactivity concentration detector 30.

[0051] In an optional embodiment, the inner support bracket 20 is composed of two parts, including a first bracket and a second bracket. The first and second brackets are joined together to form a columnar inner support bracket 20; alternatively, the first and second brackets are inserted together to form a columnar inner support bracket 20; or, the first and second brackets are snap-fitted together to form a columnar inner support bracket 20. The inner support bracket 20 supports the spiral detection tubing 11 to keep it aligned with the detection area 21 of the radioactivity concentration detector 30. The positioning end 23 adjusts and assembles the detection area 21 of the spiral detection tubing 11 to fit the detection area 21 of the spiral detection tubing 11, achieving good adjustment effect.

[0052] When the first bracket and the second bracket are joined together to form a columnar inner support bracket 20, one end of the blocking pipe 12 is clamped and fixed by the first bracket and the second bracket so that it is located inside the inner support bracket 20, making installation convenient.

[0053] Preferably, the surface of the detection area 21 is coated with a silver plating layer. The silver plating layer reflects the inner wall surface of the spiral detection tube 11, thereby reducing or minimizing the influence of the inner support bracket 20 on radioactivity and further improving the detection accuracy of the radioactivity concentration detector 30.

[0054] like Figure 7 As shown, the coil device disclosed in the above embodiments is applied to the detection system to improve the accuracy and convenience of the detection system for radioactivity detection.

[0055] In one embodiment, the detection system includes a controller 40, a radiopharmaceutical source 50, a first drive pump 90 connected to the radiopharmaceutical source 50, a concentration-proportioning solution 60, a second drive pump 91 connected to the concentration-proportioning solution 60, a first three-way valve 92, a radioactivity concentration detector 30, a second three-way valve 93, a waste liquid collector 80, an output mechanism, and a coil device as disclosed in the above embodiments. The radiopharmaceutical source 50 is used to contain a high concentration of radioactive source. The first drive pump 90 is connected to the radiopharmaceutical source 50 through a pipeline, thereby drawing a high concentration of radioactive source into the first three-way valve 92 and the output pipeline connected to the first three-way valve 92. The concentration-proportioning solution 60 contains a solution for adjusting the concentration of the radioactive source, including a dilution solution such as physiological saline. The second drive pump 91 is connected to the concentration-proportioning solution 60, thereby drawing the concentration-proportioning solution 60 into another input pipeline of the first three-way valve 92. The first drive pump 90 and the second drive pump 91 are respectively connected to the first three-way valve 92, which mixes the concentration-proportioned solution 60 and the radioactive source before outputting the mixture. Preferably, a stirrer 70 is connected to the output end of the first three-way valve 92, which further mixes the concentration-proportioned solution 60 and the radioactive source to form a homogeneous radioactive fluid. Optionally, the stirrer 70 includes a housing and a rotatable impeller mounted within the housing, with blades installed on the impeller to form a rotating stirring structure. Optionally, the center lines of the housing's inlet and outlet are misaligned to drive the impeller to rotate.

[0056] The coil device's inlet is connected to the stirrer 70, and its outlet is connected to the second three-way valve 93. The coil device is inserted into the radioactivity concentration detector 30, with the detection area 21 corresponding to the detection part of the detector 30. This ensures that the detection area 21 is directly aligned with the sensing part of the detector 30, thereby obtaining accurate reflectivity parameters to determine the activity range of the radioactive fluid. Compared to the method where the coil device's centerline is perpendicular to the centerline of the detector 30, this method offers higher accuracy and lower loss rate in radioactivity detection. The coil device is inserted into the detector 30, and the centerline of the detection area 21 coincides with the centerline of the detector 30, resulting in high uniformity of detection and accurate results. Preferably, the positioning end 23 is inserted and fixed to the detector 30, accurately defining the distance between the spiral detection tube 11 and the test wall of the detector 30, ensuring high detection accuracy. Furthermore, the inner support bracket 20 covers the opening of the detector 30, preventing radioactive leakage.

[0057] The coil assembly, output mechanism, and waste liquid collector 80 are respectively connected to the second three-way valve 93. The controller 40 is electrically connected to the first drive pump 90, the second drive pump 91, the first three-way valve 92, the radioactivity concentration detector 30, and the second three-way valve 93. The controller 40, acting as the main controller, receives the signal output from the radioactivity concentration detector 30, determines the activity range of the radioactive fluid flowing in the current spiral detection pipeline 11, and judges whether the prepared radioactive fluid meets the requirements. When the radioactive fluid meets the requirements, the second three-way valve 93 opens the channel of the output mechanism to output the radioactive fluid. When the radioactive fluid does not meet the requirements, the second three-way valve 93 opens the channel of the waste liquid collector 80 to discharge the radioactive fluid into the waste liquid collector 80 for centralized treatment.

[0058] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0059] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A coil device for conveying and detecting the concentration of radioactive fluid, characterized in that, include: The internal support bracket has a recessed detection area. A concentration detection pipeline wound around the detection area, the concentration detection pipeline including a spiral detection pipeline and a blocking pipeline respectively connected to both ends of the spiral detection pipeline, the blocking pipeline passing through the inner support bracket, the spiral detection pipeline surrounding the detection area, wherein the spiral detection pipeline is a pipeline that transmits the radioactivity of the radioactive fluid, and the blocking pipeline is a pipeline that blocks the radioactivity of the radioactive fluid. The barrier conduit includes a guide tube and a barrier layer enclosing the guide tube, the barrier layer being made of a material that blocks the radioactivity of the radioactive fluid; The barrier layer includes a base film layer and at least one silver plating layer coated on the surface of the base film layer, the silver plating layer being attached to the guide tube.

2. The coil device according to claim 1, characterized in that, The projections of the barrier layer end faces at both ends of the spiral detection pipeline onto a plane perpendicular to the centerline of the spiral detection pipeline coincide.

3. The coil device according to claim 1, characterized in that, The spiral detection conduit includes two or more spiral conduits wound around the detection area, wherein the volume of the radioactive fluid in the spiral detection conduit is: V = 2πr 2 •(R+r)•Int(L / 2r), where R is the radius of the detection zone; r is the radius of the spiral conduit; and L is the axial length of the spiral detection conduit.

4. The coil device according to claim 3, characterized in that, Both ends of the spiral detection pipeline are provided with throttling rings that are recessed toward the center of the spiral conduit, and the barrier pipeline intersects with the throttling rings.

5. The coil device according to claim 1, characterized in that, The inner support bracket includes an installation end located at one end of the detection area and a positioning end located at the other end of the detection area. The installation end is provided with an installation groove, and one end of the blocking pipe is confined within the installation groove. The positioning end is provided with a positioning hole, and the other end of the blocking pipe passes through the inner support bracket along the positioning hole and exits from the installation end.

6. The coil device according to claim 1, characterized in that, The surface of the detection area is coated with a silver plating layer.

7. A detection system, characterized in that, The device includes a controller, a radiopharmaceutical source, a first drive pump connected to the radiopharmaceutical source, a concentration-proportioning solution, a second drive pump connected to the concentration-proportioning solution, a first three-way valve, a radioactive concentration detector, a second three-way valve, a waste liquid collector, an output mechanism, and a coil device as described in any one of claims 1-6. The coil device is inserted into the radioactive concentration detector, the detection area corresponds to the detection part of the radioactive concentration detector, the inner support bracket covers the opening of the radioactive concentration detector, the first drive pump and the second drive pump are respectively connected to the first three-way valve, the coil device, the output mechanism and the waste liquid collector are respectively connected to the second three-way valve, and the controller is electrically connected to the first drive pump, the second drive pump, the first three-way valve, the radioactive concentration detector and the second three-way valve.

8. The detection system according to claim 7, characterized in that, The centerline of the detection area coincides with the centerline of the radioactivity concentration detector.

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