Radionuclide detection device

Abstract

The utility model provides a radionuclide detection device. The radionuclide detection device comprises a detection chamber, a gas collection card and a detection assembly, and the detection chamber is arranged to be an ellipsoid-shaped light reflecting chamber. The gas collection card is used for placing a to-be-detected piece, a light-emitting part is arranged on the gas collection card, and after the to-be-detected piece is placed in the gas collection card, the light-emitting part can emit light; the light-emitting part can extend into the detection cavity, and the light-emitting part can extend into the first focal point of the ellipsoidal light reflection cavity. The detection assembly is arranged on the detection cavity, a receiving part is arranged on the detection assembly, and the receiving part extends into the detection cavity and extends into the second focus of the ellipsoidal light reflection cavity. According to the radionuclide detection device provided by the utility model, the detection chamber is arranged to be the ellipsoidal light reflecting cavity, and the light emitting part and the receiving part are respectively arranged at the two focal points of the ellipsoidal light reflecting cavity, so that the detection efficiency of the detection assembly can be effectively improved, and the detection sensitivity and accuracy of the radionuclide detection device are improved.

Description

Technical Field

[0001] The utility model relates to the field of radionuclide detection, in particular to a radionuclide detection device. Background Art

[0002] In the related art, the commonly used method for detecting Helicobacter pylori is the urea breath test, which is to detect carbon-13 or carbon-14 in the exhaled gas of the subject to determine whether the subject has Helicobacter pylori infection. The detection device is divided into card type, liquid scintillation type, solid scintillation type and other forms according to the different exhaled breath collection and measurement components.

[0003] When the subject breathes, he or she exhales air containing 14 C (carbon-14) CO2 (carbon dioxide) gas. Among them, 14 During the decay process, C will release beta rays. The card-type breath collection device can count the intensity of ionizing radiation through the GM tube (Geiger counter) and use the ionization counting method to detect beta rays. However, the GM tube has no energy discrimination ability and cannot identify the type of rays that produce counts. In addition, the detection efficiency of the GM tube is low, generally less than 10%, which seriously restricts the detection sensitivity and accuracy.

[0004] Solid scintillation and liquid scintillation breath collection devices are pre-loaded with scintillation liquid, alkaline substances and other organic solvents through a plastic bottle with a built-in scintillation sheet and an overlapping absorption sheet. 14 The CO2 gas of C is blown into the bottle and absorbed, and the radioactivity of the sample is measured by the principle of scintillation counting through the PMT (photomultiplier tube). Usually, a double-tube or triple-tube composite method is used to improve the detection efficiency and reduce noise interference. However, there are still disadvantages such as cumbersome scintillation liquid configuration process, complex instrument layout configuration, and high overall cost. Utility Model Content

[0005] In order to overcome the defects existing in the related art, the utility model provides a radionuclide detection device.

[0006] The embodiment of the utility model is achieved as follows:

[0007] A radionuclide detection device comprises a detection chamber, a gas collecting card, and a detection component. The detection chamber is configured as an ellipsoidal reflective cavity. The gas collecting card is used to place a part to be detected, and a light-emitting part is provided on the gas collecting card. After the part to be detected is placed in the gas collecting card, the light-emitting part can emit light; the light-emitting part can extend into the detection chamber, and the light-emitting part can extend into the first focus of the ellipsoidal reflective cavity. The detection component is arranged on the detection chamber, and a receiving part is provided on the detection component, and the receiving part extends into the detection chamber and extends into the second focus of the ellipsoidal reflective cavity.

[0008] Furthermore, a first opening is provided on the detection chamber, and the gas collecting card can be slidably installed in the first opening.

[0009] Furthermore, a blocking piece is provided on the end of the gas collecting card away from the detection chamber, the blocking piece can abut against the first opening, and the blocking piece and the first opening are sealed.

[0010] Furthermore, a card slot is provided on the gas collecting card, the card slot is provided along the sliding direction of the gas collecting card and is vertically arranged in the middle of the gas collecting card, and the to-be-detected part can be placed in the card slot.

[0011] Furthermore, the gas collecting card is also provided with a slot, which is cylindrical; the slot is arranged in the card slot, and the slot is communicated with the card slot.

[0012] Furthermore, a through hole is provided on the gas collecting card, the axis of the through hole is arranged perpendicular to the plane where the card slot is located, and the through hole passes through the gas collecting card; plastic scintillators are arranged at both ends of the through hole.

[0013] Furthermore, the through hole is arranged on the gas collecting card and is arranged at a position where the card slot and the slot overlap.

[0014] Furthermore, the detection component includes a photomultiplier tube, the receiving part is arranged on the photomultiplier tube, and an output part is arranged on an end of the photomultiplier tube away from the receiving part.

[0015] Furthermore, a second opening is provided on the detection chamber, the receiving portion abuts against the second opening, and a buffer component is provided between the second opening and the receiving portion.

[0016] Furthermore, a yielding portion is provided on the detection chamber, the yielding portion and the gas collecting card are arranged in the same plane, and the gas collecting card can extend into the yielding portion.

[0017] The beneficial effects of the embodiments of the utility model are:

[0018] The utility model provides a radioactive nuclide detection device, including a detection chamber, a gas collecting card, and a detection component. The detection chamber is configured as an ellipsoidal reflective cavity. The gas collecting card is used to place the part to be detected, and a light-emitting part is arranged on the gas collecting card. After the part to be detected is placed in the gas collecting card, the light-emitting part can emit light; the light-emitting part can extend into the detection chamber, and the light-emitting part can extend into the first focus of the ellipsoidal reflective cavity. The detection component is arranged on the detection chamber, and a receiving part is arranged on the detection component, and the receiving part extends into the detection chamber and extends into the second focus of the ellipsoidal reflective cavity. In this way, after the part to be detected is placed on the gas collecting card, the light-emitting part can emit light. Since the light-emitting part is arranged at the first focus of the ellipsoidal reflective cavity, the emitted light can be reflected and converged at the second focus, and is sensed by the receiving part of the detection component, and then the detection result is issued by the detection component.

[0019] The radionuclide detection device provided by the utility model can effectively improve the detection efficiency of the detection component and improve the sensitivity and accuracy of the detection of the utility model by setting the detection chamber as an ellipsoidal reflective cavity and setting the light-emitting part and the receiving part at two focal points of the ellipsoidal reflective cavity respectively. In addition, during the detection process, no scintillation liquid is required, the overall structure is simple, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a radionuclide detection device from one perspective of an embodiment of the utility model;

[0022] Figure 2 A schematic structural diagram of the radionuclide detection device of another embodiment of the utility model from another perspective;

[0023] Figure 3 A cross-sectional view of a radionuclide detection device according to an embodiment of the utility model from one perspective;

[0024] Figure 4 A cross-sectional view of the radionuclide detection device of an embodiment of the utility model from another perspective;

[0025] Figure 5This is a schematic diagram of the three-dimensional structure of the radionuclide detection device of an embodiment of the utility model from another perspective.

[0026] icon:

[0027] 100 - detection chamber; 110 - yielding portion; 120 - ellipsoidal reflective cavity; 200 - gas collecting card; 210 - card slot; 211 - operation window; 220 - slot; 230 - plastic scintillator; 231 - through hole; 240 - blocking member; 300 - detection assembly. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example 1

[0035] The embodiment of the utility model provides a radionuclide detection device to solve the problems of low detection efficiency, low sensitivity, poor accuracy, complex instrument structure and high overall cost in the related technology.

[0036] See also Figure 1 , Figure 3 , Figure 4 A radionuclide detection device includes a detection chamber 100, a gas collecting card 200, and a detection assembly 300. The detection chamber 100 is configured as an ellipsoidal reflective cavity 120. The gas collecting card 200 is used to place the detected object, and a light-emitting portion is provided on the gas collecting card 200. After the detected object is placed in the gas collecting card 200, the light-emitting portion can emit light; the light-emitting portion can extend into the detection chamber 100, and the light-emitting portion can extend to the first focus of the ellipsoidal reflective cavity 120. The detection assembly 300 is disposed on the detection chamber 100, and a receiving portion is provided on the detection assembly 300, and the receiving portion extends into the detection chamber 100, and extends to the second focus of the ellipsoidal reflective cavity 120.

[0037] Specifically, when using the radionuclide detection device of the present embodiment, the gas collection card 200 is pulled out, and after the part to be detected is placed in a suitable position on the gas collection card 200, the gas collection card 200 is extended into the detection chamber 100. The nuclides contained in the part to be detected will emit rays, and the rays can stimulate the light-emitting part to emit light. After the light-emitting part emits light, since the light-emitting part is extended into the ellipsoidal reflective cavity 120 and is located at the first focus of the ellipsoidal reflective cavity 120, the light emitted by the light-emitting part will be repeatedly reflected by the ellipsoidal reflective cavity 120 and will converge at the second focus of the ellipsoidal reflective cavity 120. The receiving part of the detection component 300 is arranged at the second focus, and the light converged at the second focus will be received and detected by the detection component 300, and the detection component 300 sends a signal to transmit the detection result.

[0038] In the present embodiment, the detection chamber 100 is configured as an ellipsoidal reflective cavity 120, which can effectively converge the light emitted by the light-emitting part. That is, the light emitted by the light-emitting part is weak, and after converging at the focal point, it can also be effectively detected by the detection component 300, thereby ensuring the sensitivity and accuracy of the detection of the present embodiment.

[0039] In one embodiment, for example, a reflective coating is provided on the inner wall of the ellipsoidal reflective cavity 120 to improve the reflective efficiency, thereby improving the sensitivity and accuracy of the detection of this embodiment. Specifically, in this embodiment, the inner wall of the ellipsoidal reflective cavity 120 uses an enhanced aluminum film coating process, which can effectively reduce the scattering and absorption of light and improve the reflection efficiency.

[0040] In one embodiment, for example, Figure 1 , Figure 3 , Figure 4 As shown, a first opening is provided on the detection chamber 100, and the gas collecting card 200 can be slidably installed in the first opening. The first opening is provided on the detection chamber 100, so that the structural design of the gas collecting card 200 and the detection chamber 100 is more reasonable, and it is also convenient for the detection operation of this embodiment. When it is necessary to place the part to be detected, the gas collecting card 200 is pulled out from the first opening, and after the part to be detected is placed in a suitable position, the gas collecting card 200 is pushed back into the detection chamber 100, which is simple and convenient to operate.

[0041] In one embodiment, for example, Figure 1 , Figure 3 , Figure 4 As shown, a blocking piece 240 is provided at the end of the gas collecting card 200 away from the detection chamber 100, and the blocking piece 240 can abut against the first opening, and the blocking piece 240 and the first opening are sealed. The blocking piece 240 is provided at the end of the gas collecting card 200, so that after the gas collecting card 200 has placed the part to be detected and extended into the detection chamber 100, the blocking piece 240 can abut against the first opening, ensuring that no light can pass through the first opening, thereby providing a good detection environment for the detection chamber 100. In other words, the light in the detection chamber 100 is all emitted by the light-emitting part on the gas collecting card 200, without interference from external light, further ensuring the sensitivity and accuracy of the detection of this embodiment.

[0042] In one embodiment, for example, Figure 2As shown, a card slot 210 is provided on the gas collecting card 200, and the card slot 210 is provided along the sliding direction of the gas collecting card 200 and is vertically arranged in the middle of the gas collecting card 200, and the test piece can be placed in the card slot 210. In the breath test for detecting Helicobacter pylori, a blow card is usually used to sample the gas exhaled by the subject, and the card slot 210 is provided on the gas collecting card 200, so that the blow card can be conveniently inserted directly into the gas collecting card 200 of this embodiment to perform radionuclide detection operations.

[0043] In one embodiment, for example, Figure 1 As shown, an operation window 211 is provided on the gas collecting card 200 at a position away from the detection chamber 100. In this way, when the operator inserts or extracts the blowing card into or from the card slot 210 of the gas collecting card 200, the blowing card can be directly taken out from the operation window 211, which reduces the difficulty of placing and taking out the blowing card, making this embodiment more convenient to operate.

[0044] In one embodiment, for example, Figure 2 As shown, the gas collection card 200 is also provided with a slot 220, which is cylindrical; the slot 220 is arranged in the card slot 210, and the slot 220 is connected to the card slot 210. In the breath test for detecting Helicobacter pylori, the liquid scintillation detection method usually places the sample collected from the subject in a collection bottle. The slot 220 is arranged on the gas collection card 200, which can facilitate the liquid scintillation collection bottle to be directly inserted into the gas collection card 200 of this embodiment for detection.

[0045] It should be noted that, in the present embodiment, the gas collection card 200 is integrated with a card slot 210 and a slot 220, that is, the present embodiment can take into account the structure of the collection equipment for the card-type breath test, the liquid scintillation breath test, and the solid-scintillation breath test, and integrates the consumable interfaces of various breath tests on the gas collection card 200, so that the present embodiment can detect various forms of breath tests, further making the present embodiment convenient to use.

[0046] It can be understood that in this embodiment, a limiting step is also provided in the slot 220. The diameter of the bottle cap of the collection bottle of the liquid scintillation detection method is usually larger than the diameter of the bottle body. In this way, after the collection bottle is placed in the slot 220, the bottle cap of the collection bottle can abut against the limiting step, so that the collection bottle is in a suitable position to stimulate the light-emitting component to emit light.

[0047] In one embodiment, for example, Figure 1 , Figure 3 , Figure 5As shown, a through hole 231 is provided on the gas collecting card 200, the axis of the through hole 231 is perpendicular to the plane where the card slot 210 is located, and the through hole 231 passes through the gas collecting card 200; plastic scintillators 230 are provided at both ends of the through hole 231. The plastic scintillator 230 is provided in the through hole 231 of the gas collecting card 200, so that after the part to be detected is placed in the card slot 210 or the slot 220 on the gas collecting card 200, the radioactive nuclides on the part to be detected can directly stimulate the plastic scintillator 230 to emit light for detection.

[0048] It should be noted that, according to different detection purposes, different nuclides may be included on the detected part. According to the actual purpose of use, a suitable light-emitting component is correspondingly set, as long as the light-emitting component can emit light after being irradiated by the nuclide. Exemplarily, this embodiment is used to detect Helicobacter pylori. During the detection of Helicobacter pylori, the subject will exhale CO2 gas containing 14C, wherein 14C will release β rays during the decay process. The light-emitting component in the embodiment is set as a plastic scintillator 230, and the β rays will cause the plastic scintillator 230 to emit light, and the emitted light is captured by the detection component 300 to achieve the purpose of detection.

[0049] It is understandable that the through hole 231 is provided on the gas collecting card 200, and the plastic scintillator 230 is provided at both ends of the through hole 231, so that the double-sided energy of the to-be-detected part inserted into the card slot 210 or the slot 220 of the gas collecting card 200 can be utilized. During the detection operation, both sides of the gas collecting card 200 can emit light, which improves the utilization rate of light, that is, improves the luminous intensity, makes the present embodiment easy to detect, and further improves the detection efficiency of the present embodiment.

[0050] In one embodiment, for example, Figure 3 As shown, the through hole 231 is arranged on the gas collecting card 200, and is arranged at the position where the card slot 210 and the slot 220 overlap. The through hole 231 is arranged at the position where the card slot 210 and the slot 220 overlap, that is, the plastic scintillator 230 is arranged at the overlapping position, so that no matter whether the to-be-detected part is a solid flash type, a card type, or a liquid flash type, after being placed on the gas collecting card 200, the radiation of the nuclide can be stably and reliably transferred to the plastic scintillator 230, thereby ensuring the stable and reliable detection of this embodiment.

[0051] In one embodiment, for example, Figures 1 to 3As shown, the detection component 300 includes a photomultiplier tube, a receiving part is arranged on the photomultiplier tube, and an output part is arranged at the end of the photomultiplier tube away from the receiving part. The photomultiplier tube is arranged as the detection component 300, and the receiving part is arranged on the photomultiplier tube, and the receiving part is located at the second focus of the ellipsoidal reflective cavity 120. In this way, the photomultiplier tube can accurately and sensitively detect the light changes in the ellipsoidal reflective cavity 120, thereby outputting the detected light signal as an electrical signal, transmitting it to the feedback instrument, and displaying the detection result.

[0052] In one embodiment, for example, Figure 1 , Figure 3 , Figure 4 As shown, a second opening is provided on the detection chamber 100, the receiving part abuts against the second opening, and a buffer component is provided between the second opening and the receiving part. The buffer component is provided between the second opening and the receiving part to protect the receiving part, avoid collision between the receiving part and the detection chamber 100, and extend the service life of this embodiment.

[0053] In one embodiment, for example, Figure 5 As shown, a clearance portion 110 is provided on the detection chamber 100, and the clearance portion 110 and the gas collecting card 200 are provided in the same plane, and the gas collecting card 200 can be extended into the clearance portion 110. The clearance portion 110 is provided on the detection chamber 100. On the one hand, the structure of the present embodiment can be made more reasonable. When the gas collecting card 200 is extended into the detection chamber 100, it will not be blocked or interfered by the inner wall of the detection chamber 100; on the other hand, after the gas collecting card 200 is extended into the detection chamber 100, one end of the gas collecting card 200 abuts at the first opening, and the other end abuts against the clearance portion 110. The gas collecting card 200 is fixed by the two ends to prevent the gas collecting card 200 from shaking after being extended into the detection chamber 100, thereby affecting the detection result and improving the accuracy and sensitivity of the detection.

[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A radionuclide detection device, characterized in that: include: A detection chamber (100), wherein the detection chamber (100) is configured as an ellipsoidal reflective chamber (120); A gas collection card (200), the gas collection card (200) being used to place a to-be-detected part, the gas collection card (200) being provided with a light-emitting part, and after the to-be-detected part is placed in the gas collection card (200), the light-emitting part can emit light; the light-emitting part can extend into the detection chamber (100), and the light-emitting part can extend to the first focus of the ellipsoidal reflective cavity (120); A detection component (300), wherein the detection component (300) is arranged on the detection chamber (100), and a receiving portion is arranged on the detection component (300), and the receiving portion extends into the detection chamber (100) and extends to the second focus of the ellipsoidal reflective cavity (120).

2. The radionuclide detection device according to claim 1, characterized in that: The detection chamber (100) is provided with a first opening, and the gas collection card (200) can be slidably installed in the first opening.

3. The radionuclide detection device according to claim 2, characterized in that: A blocking piece (240) is provided on the end of the gas collecting card (200) away from the detection chamber (100); the blocking piece (240) can abut against the first opening, and a sealing arrangement is provided between the blocking piece (240) and the first opening.

4. The radionuclide detection device according to claim 1, characterized in that: The gas collection card (200) is provided with a card slot (210), the card slot (210) is opened along the sliding direction of the gas collection card (200) and is vertically arranged in the middle of the gas collection card (200), and the to-be-detected part can be placed in the card slot (210).

5. The radionuclide detection device according to claim 4, characterized in that: The gas collecting card (200) is also provided with a slot (220), and the slot (220) is cylindrical; the slot (220) is arranged in the card slot (210), and the slot (220) is connected to the card slot (210).

6. The radionuclide detection device according to claim 5, characterized in that: The gas collecting card (200) is provided with a through hole (231), the axis of the through hole (231) is arranged perpendicular to the plane where the card slot (210) is located, and the through hole (231) passes through the gas collecting card (200); plastic scintillators (230) are arranged at both ends of the through hole (231).

7. The radionuclide detection device according to claim 6, characterized in that: The through hole (231) is arranged on the gas collecting card (200) and is arranged at a position where the card slot (210) and the slot (220) overlap.

8. The radionuclide detection device according to claim 1, characterized in that: The detection component (300) comprises a photomultiplier tube, the receiving part is arranged on the photomultiplier tube, and an output part is arranged at an end of the photomultiplier tube away from the receiving part.

9. The radionuclide detection device according to claim 8, characterized in that: The detection chamber (100) is provided with a second opening, the receiving portion abuts against the second opening, and a buffer component is provided between the second opening and the receiving portion.

10. The radionuclide detection device according to claim 1, characterized in that: The detection chamber (100) is provided with a clearance portion (110), the clearance portion (110) and the gas collection card (200) are arranged in the same plane, and the gas collection card (200) can extend into the clearance portion (110).

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