Anti-radiation isolation device for medical image

By designing a radiation-proof isolation device with integrated radiation detection and automatic adjustment functions, it solves the problem of difficulty in real-time monitoring and adapting to different radiation environments in the prior art, and effectively protects patients and medical staff.

CN119405339APending Publication Date: 2025-02-11FOURTH MILITARY MEDICAL UNIVERSITY

Patent Information

Application Number
CN202411551719.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-01
Publication Date
2025-02-11

AI Technical Summary

Technical Problem

The prior art is difficult to understand the radiation level of the current environment in real time, and different medical imaging examination projects have different requirements for radiation protection, making it difficult to ensure that the device provides sufficient but not excessive protection, making it difficult to maximize the safety of patients and medical staff.

Method used

A radiation-proof isolation device including a radiation detection module, a regulation control module, a display and control module, a data recording and analysis module is designed. The radiation intensity is monitored in real time through the radiation detection module, and the adjustment control module automatically adjusts the protection measures based on the data to ensure appropriate protection is provided in different radiation environments.

Benefits of technology

Real-time monitoring and dynamic adjustment of the radiation environment are achieved, ensuring appropriate radiation protection is provided in different medical imaging examination projects, and the safety of patients and medical staff is protected to the greatest extent.

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Abstract

The invention discloses an anti-radiation isolation device for medical images, and relates to the technical field of medical instruments, and the device comprises a radiation detection module which is responsible for monitoring the radiation intensity in an environment in real time; the adjustment control module is responsible for automatically adjusting protection measures according to data of the radiation detection module; the display and control module is responsible for providing a visual operation interface and real-time information display for medical staff; the data recording and analyzing module is responsible for recording radiation level, adjusting history and other related data for subsequent analysis and reporting; according to the invention, the shielding cloth body can be retracted and released by rotating the shielding cloth retracting and releasing roller, and the protective door can be lifted by rotating the threaded rod, so that the opening and closing of the protective door can be controlled, that is, proper radiation isolation measures can be taken according to the radiation intensity of the current environment; and the working efficiency can be improved on the premise of ensuring the safety.
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Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a radiation protection isolation device for medical imaging. Background Art

[0002] With the rapid development of medical technology, medical imaging technology plays an increasingly important role in clinical diagnosis and treatment. These technologies include but are not limited to X-ray photography, computed tomography (CT), magnetic resonance imaging (MRI), etc. They can clearly display the internal structure and function of the human body and provide doctors with accurate diagnostic basis. However, these devices will generate certain radiation during use, and long-term exposure to radiation environment may cause health damage to medical staff and patients. Radiation protection is an important link that cannot be ignored in the application of medical imaging technology. In order to ensure the health and safety of medical staff and patients, effective radiation protection measures must be taken. As one of the important means, radiation protection isolation devices can effectively shield radiation and reduce the impact of radiation on personnel.

[0003] After searching, the Chinese patent number CN221577784U discloses a radiation protection isolation device for medical imaging, which belongs to the field of medical instrument technology, including a main baffle and two sub-baffles, the bottom surface of the main baffle is flush with the bottom surfaces of the two sub-baffles, and a storage groove adapted to the sub-baffle is provided inside the main baffle, and the two sub-baffles are slidably connected to the storage groove, the front and back sides of the main baffle are fixedly connected with a storage shell, and the bottom surface of the storage shell is flush with the bottom surface of the main baffle, and the interiors of the two storage shells are slidably connected with a lifting plate, and by arranging universal wheels, the device can be easily moved, and by the cooperation between the storage shell, the lifting plate and the lifting assembly, after the device is moved to the specified position, the universal wheels can be stored in the interior of the storage shell, thereby avoiding gaps between the main baffle and the sub-baffle and the ground, and further avoiding radiation leakage from the gaps and causing harm to the bodies of medical staff.

[0004] However, during the actual use of the above-mentioned device, it is difficult to understand the radiation level of the current environment in real time. Different medical imaging examination projects may have different requirements for radiation protection. It is difficult to ensure that the device can provide sufficient but not excessive protection, and it is difficult to maximize the safety of patients and medical staff. Therefore, it is necessary to propose a radiation protection isolation device for medical imaging. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art that it is difficult to understand the radiation level of the current environment in real time, different medical imaging examination items may have different requirements for radiation protection, it is difficult to ensure that the device can provide sufficient but not excessive protection, and it is difficult to maximize the safety of patients and medical staff. A radiation protection isolation device for medical imaging is proposed to solve the problems in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A radiation protection isolation device for medical imaging, comprising:

[0008] Radiation detection module: responsible for real-time monitoring of radiation intensity in the environment;

[0009] Adjustment control module: responsible for automatically adjusting protection measures according to the data of the radiation detection module;

[0010] Display and control module: responsible for providing medical staff with an intuitive operation interface and real-time information display;

[0011] Data recording and analysis module: responsible for recording radiation levels, adjustment history and other relevant data for subsequent analysis and reporting;

[0012] The adjustment control module is arranged inside the protective box, and the interior of the protective box is rotatably connected to a shielding cloth taking-up roller, and the shielding cloth taking-up roller is provided with a shielding cloth body for shielding radiation, one side of the protective box is rotatably connected to a threaded rod, the upper part of the threaded rod is fixedly connected to a fourth rotating shaft, the upper part of the fourth rotating shaft is rotatably connected to the protective box, the threaded rod is threadedly connected to a protective door for isolating radiation, the protective door is slidably connected to a fixed rod, and the fixed rod and the protective box are fixedly connected.

[0013] The above technical solution further includes:

[0014] The upper part of the protection box is fixedly connected with a fixing seat, the interior of the fixing seat is provided with a second sliding groove, and the second sliding groove is slidably connected with a second rack;

[0015] The second sliding groove facilitates the second rack to remain stable when it moves.

[0016] A second control cylinder for controlling the second rack to slide inside the second slide groove is fixedly installed on the upper part of the protective box, and a second gear is meshed and connected to the upper part of the second rack. The second gear is fixedly connected to a second rotating shaft, and the second rotating shaft is rotatably connected to the protective box.

[0017] The second rotating shaft is fixedly connected to the first bevel gear, the lower part of the first bevel gear is meshedly connected to the second bevel gear, and the second bevel gear is fixedly connected to the third rotating shaft.

[0018] The third rotating shaft is rotationally connected to the protection box, the third rotating shaft is transmission-connected to a second belt, and the second belt is transmission-connected to the fourth rotating shaft.

[0019] A first slide groove is provided inside the fixing seat, a first rack is slidably connected to the first slide groove, and a first control cylinder for controlling the first rack to slide inside the first slide groove is fixedly installed on the upper part of the protection box;

[0020] The first sliding groove facilitates the first rack to remain stable when it moves.

[0021] The upper portion of the first rack is meshedly connected with a first gear, the first gear is fixedly connected with a first rotating shaft, and the first rotating shaft penetrates the second rotating shaft and extends to one side of the protective box.

[0022] The first rotating shaft is rotationally connected to the protection box, the first rotating shaft is rotationally connected to the second rotating shaft, the first rotating shaft is transmission-connected to a first belt, and the first belt is transmission-connected to a shielding cloth retracting roller.

[0023] The specific steps of the adjustment control module are:

[0024] Real-time radiation monitoring: real-time monitoring of the radiation intensity around the medical imaging equipment, and transmission of data to the regulation and control module, which receives and processes the radiation intensity data and analyzes the current radiation level;

[0025] Radiation intensity comparison: Set thresholds under different radiation intensities, compare real-time radiation data with the preset thresholds, and determine whether the radiation intensity is within a safe range;

[0026] Adjustment strategy: Based on the comparison results, the adjustment control module decides the adjustment measures to be taken;

[0027] Execute adjustment: the adjustment control module drives the first control cylinder to adjust the retracted and extended state of the shielding cloth body, and drives the second control cylinder to adjust the opening and closing of the protective door;

[0028] Verify the effect: After the adjustment is completed, continue to monitor the radiation level to confirm that the radiation intensity can be effectively reduced to a safe range.

[0029] The specific steps of the radiation intensity comparison are:

[0030] Read current radiation intensity data: read real-time radiation intensity value from the radiation detection module;

[0031] Get threshold settings: Get low and high thresholds set according to relevant safety standards or equipment requirements;

[0032] Perform comparison: compare the current radiation intensity value with the low threshold and the high threshold. If the current radiation intensity value is less than the low threshold, it is low radiation; if the low threshold is less than the current radiation intensity value and less than the high threshold, it is medium radiation; if the current radiation intensity value is greater than the high threshold, it is high radiation;

[0033] Trigger response measures: Low radiation: the shielding cloth body is in normal protection state, and the protective door remains open or in normal state; Medium radiation: ensure that the shielding cloth body is completely covered, the protective door remains closed, and ensure its sealing performance is good; High radiation: adjust or reinforce the shielding cloth body to ensure seamless coverage of key areas, the protective door remains tightly closed and automatically locked.

[0034] The present invention has the following beneficial effects:

[0035] 1. In the present invention, the shielding cloth body can be retracted and released by rotating the shielding cloth retracting roller, and the protective door can be raised and lowered by rotating the threaded rod, that is, the opening and closing of the protective door can be controlled, that is, appropriate radiation isolation measures can be taken according to the radiation intensity of the current environment, and work efficiency can be improved while ensuring safety.

[0036] 2. In the present invention, the real-time monitored radiation intensity data is compared with the set threshold value through the control module, and the current radiation intensity will be judged as one of low radiation, medium radiation and high radiation. Different corresponding measures will be triggered according to different radiation levels to improve the safety of the radiation protection isolation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a radiation protection isolation device for medical imaging proposed by the present invention;

[0038] Figure 2 It is a schematic diagram of the first structure of the present invention;

[0039] Figure 3 It is a second structural schematic diagram of the present invention;

[0040] Figure 4 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0041] Figure 5 for Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0042] Figure 6 It is a system block diagram of the present invention.

[0043] In the figure: 1. protection box; 2. threaded rod; 3. fixed rod; 4. shielding cloth body; 5. protection door; 6. first belt; 7. first gear; 8. second gear; 9. first bevel gear; 10. shielding cloth retracting roller; 11. fixed seat; 12. first control cylinder; 13. second control cylinder; 14. first rack; 15. second rack; 16. first rotating shaft; 17. second rotating shaft; 18. second bevel gear; 19. third rotating shaft; 20. second belt; 21. fourth rotating shaft; 22. first slide groove; 23. second slide groove. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0045] like Figure 1 - Figure 6 As shown, a radiation protection isolation device for medical imaging comprises:

[0046] Radiation detection module: responsible for real-time monitoring of radiation intensity in the environment;

[0047] Adjustment control module: responsible for automatically adjusting protection measures according to the data of the radiation detection module;

[0048] Display and control module: responsible for providing medical staff with an intuitive operation interface and real-time information display;

[0049] Data recording and analysis module: responsible for recording radiation levels, adjustment history and other relevant data for subsequent analysis and reporting;

[0050] The adjustment control module is arranged inside the protective box 1, and the inside of the protective box 1 is rotatably connected to a shielding cloth taking-up roller 10, and the shielding cloth taking-up roller 10 is provided with a shielding cloth body 4 for shielding radiation. One side of the protective box 1 is rotatably connected to a threaded rod 2, and the upper part of the threaded rod 2 is fixedly connected to a fourth rotating shaft 21, and the upper part of the fourth rotating shaft 21 is rotatably connected to the protective box 1. The threaded rod 2 is threadedly connected to a protective door 5 for isolating radiation, and the protective door 5 is slidably connected to a fixed rod 3, and the fixed rod 3 and the protective box 1 are fixedly connected.

[0051] The working principle of a radiation protection isolation device for medical imaging proposed by the present invention is that when the device needs to perform radiation protection isolation, rotating the shielding cloth retracting roller 10 will open the shielding cloth body 4 wrapped on the shielding cloth retracting roller 10, which can perform preliminary isolation. When the isolation effect needs to be strengthened, the fourth rotating shaft 21 is rotated. The rotation of the fourth rotating shaft 21 will drive the threaded rod 2 fixedly connected at the lower part to rotate. The rotation of the threaded rod 2 will cause the threaded protective door 5 to move up and down. The fixed rod 3 to which the protective door 5 is slidably connected is fixedly connected to the protective box 1, so that the protective door 5 can remain stable when moving up and down, that is, the radiation isolation effect can be enhanced when the protective door 5 is closed.

[0052] In one embodiment, for the above-mentioned protection box 1 , a fixing seat 11 is fixedly connected to the upper portion of the protection box 1 , a second slide groove 23 is provided inside the fixing seat 11 , and a second rack 15 is slidably connected to the second slide groove 23 .

[0053] In one embodiment, for the above-mentioned protective box 1, a second control cylinder 13 for controlling the second rack 15 to slide inside the second slide groove 23 is fixedly installed on the upper part of the protective box 1, and the upper part of the second rack 15 is meshedly connected with the second gear 8, and the second gear 8 is fixedly connected with the second rotating shaft 17, and the second rotating shaft 17 and the protective box 1 are rotatably connected.

[0054] In one embodiment, for the second rotating shaft 17 , the second rotating shaft 17 is fixedly connected to the first bevel gear 9 , the lower portion of the first bevel gear 9 is meshedly connected to the second bevel gear 18 , and the second bevel gear 18 is fixedly connected to the third rotating shaft 19 .

[0055] In one embodiment, for the third rotating shaft 19 , the third rotating shaft 19 is rotationally connected to the protective box 1 , the third rotating shaft 19 is transmission-connected to the second belt 20 , and the second belt 20 is transmission-connected to the fourth rotating shaft 21 .

[0056] The working principle of a radiation protection isolation device for medical images proposed by the present invention is to start the second control cylinder 13 fixedly installed on the upper part of the protective box 1, and the second control cylinder 13 will cause the second rack 15 set at the output end to slide in the second slide groove 23 opened inside the fixed seat 11, and when the second slide groove 23 slides, it will drive the meshing second gear 8 to rotate, and the rotation of the second gear 8 will cause the fixedly connected second rotating shaft 17 to rotate, and the rotation of the second rotating shaft 17 will cause the fixedly connected first bevel gear 9 to rotate, and the first bevel gear 9 will cause the meshing second bevel gear 18 to rotate, and the rotation of the second bevel gear 18 will cause the fixedly connected third rotating shaft 19 to rotate, and the rotation of the third rotating shaft 19 will cause the transmission-connected second belt 20 to be transmitted, and the second belt 20 will cause the transmission-connected fourth rotating shaft 21 to rotate, so that the opening and closing of the protective door 5 can be realized.

[0057] In one embodiment, for the above-mentioned fixed seat 11, a first slide groove 22 is opened inside the fixed seat 11, and the first slide groove 22 is slidably connected to the first rack 14. The upper part of the protective box 1 is fixedly installed with a first control cylinder 12 for controlling the first rack 14 to slide inside the first slide groove 22.

[0058] In one embodiment, for the first rack 14 , the upper portion of the first rack 14 is meshedly connected with the first gear 7 , the first gear 7 is fixedly connected with the first rotating shaft 16 , the first rotating shaft 16 passes through the second rotating shaft 17 and extends to one side of the protective box 1 .

[0059] In one embodiment, for the above-mentioned first rotating shaft 16, the first rotating shaft 16 and the protective box 1 are rotationally connected, the first rotating shaft 16 and the second rotating shaft 17 are rotationally connected, the first rotating shaft 16 is transmission-connected to the first belt 6, and the first belt 6 is transmission-connected to the shielding cloth retracting roller 10.

[0060] The working principle of a radiation protection isolation device for medical images proposed in the present invention is to start the first control cylinder 12 fixedly installed on the upper part of the protective box 1. The first control cylinder 12 will cause the first rack 14 set at the output end to slide in the first slide groove 22 opened inside the fixed seat 11. When the first rack 14 slides, the meshing first gear 7 will rotate. The rotation of the first gear 7 will cause the fixed first rotating shaft 16 to rotate. The first rotating shaft 16 runs through the second rotating shaft 17 and extends to one side of the protective box 1. The first rotating shaft 16 and the protective box 1 are rotatably connected, so that the first rotating shaft 16 remains stable when rotating. The rotation of the first rotating shaft 16 will cause the transmission connection of the first belt 6 to be transmitted. The transmission of the first belt 6 will drive the transmission connection of the shielding cloth retracting roller 10 to rotate, so that the retraction and release of the shielding cloth body 4 can be controlled.

[0061] In one embodiment, for the above-mentioned adjustment control module, the specific steps of the adjustment control module are:

[0062] Real-time radiation monitoring: real-time monitoring of the radiation intensity around the medical imaging equipment, and transmission of data to the regulation and control module, which receives and processes the radiation intensity data and analyzes the current radiation level;

[0063] Radiation intensity comparison: Set thresholds under different radiation intensities, compare real-time radiation data with the preset thresholds, and determine whether the radiation intensity is within a safe range;

[0064] Adjustment strategy: Based on the comparison results, the adjustment control module decides the adjustment measures to be taken;

[0065] Execution adjustment: the adjustment control module drives the first control cylinder 12 to adjust the retracted state of the shielding cloth body 4, and drives the second control cylinder 13 to adjust the opening and closing of the protection door 5;

[0066] Verify the effect: After the adjustment is completed, continue to monitor the radiation level to confirm that the radiation intensity can be effectively reduced to a safe range.

[0067] In one embodiment, for the above-mentioned radiation intensity comparison, the specific steps of the radiation intensity comparison are:

[0068] Read current radiation intensity data: read real-time radiation intensity value from the radiation detection module;

[0069] Get threshold settings: Get low and high thresholds set according to relevant safety standards or equipment requirements;

[0070] Perform comparison: compare the current radiation intensity value with the low threshold and the high threshold. If the current radiation intensity value is less than the low threshold, it is low radiation; if the low threshold is less than the current radiation intensity value and less than the high threshold, it is medium radiation; if the current radiation intensity value is greater than the high threshold, it is high radiation;

[0071] Trigger response measures: Low radiation: the shielding cloth body 4 is in normal protection state, and the protective door 5 remains open or in normal state; Medium radiation: ensure that the shielding cloth body 4 is completely covered, the protective door 5 remains closed, and ensure its sealing performance is good; High radiation: adjust or reinforce the shielding cloth body 4 to ensure seamless coverage of key areas, the protective door 5 remains tightly closed and automatically locked.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A radiation protection isolation device for medical imaging, characterized in that: include: Radiation detection module: responsible for real-time monitoring of radiation intensity in the environment; Adjustment control module: responsible for automatically adjusting protection measures according to the data of the radiation detection module; Display and control module: responsible for providing medical staff with an intuitive operation interface and real-time information display; Data recording and analysis module: responsible for recording radiation levels, adjustment history and other relevant data for subsequent analysis and reporting; The adjustment control module is arranged inside the protective box (1), and the interior of the protective box (1) is rotatably connected to a shielding cloth retracting roller (10), and the shielding cloth retracting roller (10) is provided with a shielding cloth body (4) for shielding radiation. One side of the protective box (1) is rotatably connected to a threaded rod (2), and the upper part of the threaded rod (2) is fixedly connected to a fourth rotating shaft (21), and the upper part of the fourth rotating shaft (21) is rotatably connected to the protective box (1), and the threaded rod (2) is threadedly connected to a protective door (5) for isolating radiation, and the protective door (5) is slidably connected to a fixed rod (3), and the fixed rod (3) and the protective box (1) are fixedly connected.

2. The radiation protection isolation device for medical imaging according to claim 1, characterized in that: The upper part of the protection box (1) is fixedly connected to a fixing seat (11), a second sliding groove (23) is provided inside the fixing seat (11), and the second sliding groove (23) is slidably connected to a second rack (15).

3. The radiation protection isolation device for medical imaging according to claim 1, characterized in that: A second control cylinder (13) for controlling the second rack (15) to slide inside the second slide groove (23) is fixedly installed on the upper part of the protection box (1); the upper part of the second rack (15) is meshedly connected with a second gear (8); the second gear (8) is fixedly connected with a second rotating shaft (17); and the second rotating shaft (17) and the protection box (1) are rotationally connected.

4. The radiation protection isolation device for medical imaging according to claim 3, characterized in that: The second rotating shaft (17) is fixedly connected to the first bevel gear (9), the lower part of the first bevel gear (9) is meshingly connected to the second bevel gear (18), and the second bevel gear (18) is fixedly connected to the third rotating shaft (19).

5. The radiation protection isolation device for medical imaging according to claim 4, characterized in that: The third rotating shaft (19) is rotationally connected to the protection box (1), the third rotating shaft (19) is transmission-connected to a second belt (20), and the second belt (20) is transmission-connected to a fourth rotating shaft (21).

6. The radiation protection isolation device for medical imaging according to claim 2, characterized in that: A first slide groove (22) is provided inside the fixed seat (11), and the first slide groove (22) is slidably connected to a first rack (14). A first control cylinder (12) for controlling the first rack (14) to slide inside the first slide groove (22) is fixedly installed on the upper part of the protection box (1).

7. The radiation protection isolation device for medical imaging according to claim 6, characterized in that: The upper portion of the first rack (14) is meshedly connected with a first gear (7), the first gear (7) is fixedly connected with a first rotating shaft (16), and the first rotating shaft (16) passes through the second rotating shaft (17) and extends to one side of the protective box (1).

8. The radiation protection isolation device for medical imaging according to claim 7, characterized in that: The first rotating shaft (16) is rotationally connected to the protective box (1), the first rotating shaft (16) is rotationally connected to the second rotating shaft (17), the first rotating shaft (16) is transmission-connected to the first belt (6), and the first belt (6) is transmission-connected to the shielding cloth retracting roller (10).

9. The radiation protection isolation device for medical imaging according to claim 1, characterized in that: The specific steps of the adjustment control module are: Real-time radiation monitoring: real-time monitoring of the radiation intensity around the medical imaging equipment, and transmission of data to the regulation and control module, which receives and processes the radiation intensity data and analyzes the current radiation level; Radiation intensity comparison: Set thresholds under different radiation intensities, compare real-time radiation data with the preset thresholds, and determine whether the radiation intensity is within a safe range; Adjustment strategy: Based on the comparison results, the adjustment control module decides the adjustment measures to be taken; Execution adjustment: the adjustment control module drives the first control cylinder (12) to adjust the retracted and extended state of the shielding cloth body (4), and drives the second control cylinder (13) to adjust the opening and closing of the protection door (5); Verify the effect: After the adjustment is completed, continue to monitor the radiation level to confirm that the radiation intensity can be effectively reduced to a safe range.

10. The radiation protection isolation device for medical imaging according to claim 9, characterized in that: The specific steps of the radiation intensity comparison are: Read current radiation intensity data: read real-time radiation intensity value from the radiation detection module; Get threshold settings: Get low and high thresholds set according to relevant safety standards or equipment requirements; Perform comparison: compare the current radiation intensity value with the low threshold and the high threshold. If the current radiation intensity value is less than the low threshold, it is low radiation; if the low threshold is less than the current radiation intensity value and less than the high threshold, it is medium radiation; if the current radiation intensity value is greater than the high threshold, it is high radiation; Trigger response measures: Low radiation: the shielding cloth body (4) is in a normal protection state, and the protective door (5) remains open or in a normal state; Medium radiation: ensure that the shielding cloth body (4) is completely covered, the protective door (5) remains closed, and ensures that its sealing performance is good; High radiation: Adjust or reinforce the shielding cloth body (4) to ensure seamless coverage of critical areas, and keep the protective door (5) tightly closed and automatically locked.

Citation Information

Patent Citations

  • Anti-radiation isolation device for medical image

    CN221577784U

  • Radiation isolation device for imaging department

    CN112971835A

  • Image dept. of radiology uses protector

    CN206372059U

  • Industrial flaw detection anti-radiation door

    CN210918790U

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