Medical radiation detector with high-precision detection structure

Abstract

The utility model relates to the technical field of medical radiation detection, in particular to a medical radiation detector with a high-precision detection structure, which comprises a probe assembly, a signal processing module and an auxiliary positioning mechanism. The probe assembly is provided with a focus-adjustable focusing lens and a high-sensitivity detector array, the signal processing module integrates filtering, amplification and storage functions, and the auxiliary positioning mechanism realizes accurate positioning through a slide rail and a positioning block. By optimizing the detection structure and the heat dissipation design, high-precision and rapid detection of the target sample can be realized in a complex medical scene, meanwhile, the response speed and the operation efficiency are improved, and the requirement of the modern medical field for high-precision detection is met.

Description

Technical Field

[0001] This utility model belongs to the field of medical equipment technology, specifically a medical radiation detector with a high-precision detection structure. Background Technology

[0002] With the development of medical radiological detection technology, various types of radiological detection equipment have been widely used. However, these products still have some problems in practical use. For example, medical radiological detectors currently on the market usually use relatively traditional detection structures, and their accuracy and response speed are insufficient to meet the demands of modern medical fields for high-precision and rapid detection. This leads to problems such as inaccurate detection results and low operational efficiency in some scenarios.

[0003] A search revealed a 5G- and blockchain-based system and method for detecting the radiosensitivity of tumor cells, with publication number CN112881434B, published on October 14, 2022. This design uploads data to a blockchain node via a 5G communication module and integrates a storage mechanism, a test tube placement mechanism, and a lifting mechanism to detect each test tube individually. While this design improves the efficiency of manual test tube replacement, it does not incorporate high-precision detection technology in its detection structure, and its primary focus is on the security of data transmission and storage, rather than improving detection accuracy and sensitivity. Therefore, this solution may not fully meet the needs of complex medical scenarios requiring high-precision detection.

[0004] A search revealed a controllable radiation-proof isolation layer for radiology departments, with publication number CN108166906B and publication date June 25, 2019. This design achieves radiation isolation through components such as a door panel, a pull module, an electromagnetic lock, a dimensional measuring instrument, and LED indicator lights. While this design effectively reduces the radiation impact on the outside environment when the radiology department door is open, its core function focuses on radiation isolation and is unrelated to the detection accuracy of medical radiation detectors. Furthermore, this design does not address any optimization of the detection structure, and therefore cannot overcome the shortcomings of existing medical radiation detectors in high-precision detection.

[0005] The aforementioned problems indicate that traditional medical radiography detectors currently on the market still have certain limitations in meeting the new requirements for high-precision detection in complex medical scenarios. Therefore, this invention provides a medical radiography detector with a high-precision detection structure to overcome the shortcomings of existing technologies and provide a more intelligent, efficient, and adaptable solution for changing environments. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a medical radiology detector with a high-precision detection structure, which can achieve high-precision and rapid detection of target samples in complex medical scenarios, while optimizing the detection structure to improve response speed and operational efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a medical radiology detector with a high-precision detection structure, comprising a probe assembly, a signal processing module, and an auxiliary positioning mechanism. The probe assembly includes a detection housing, one end of which has a detection window, and the other end is fixed with a mounting base. An adjusting sleeve is fixed to the mounting base via a threaded connection. A focusing lens that can move axially is disposed within the adjusting sleeve. The focusing lens and the adjusting sleeve are connected by an elastic element, which allows the focusing lens to maintain its initial position when no external force is applied.

[0008] The signal processing module includes a signal acquisition unit and a signal amplification unit. The signal acquisition unit is electrically connected to the detector in the detection window via a wire. The signal amplification unit is connected to the signal acquisition unit via a multi-layer circuit board. The multi-layer circuit board is provided with a filtering circuit and an analog-to-digital conversion circuit. The filtering circuit is used to remove noise signals, and the analog-to-digital conversion circuit converts the analog signal into a digital signal and transmits it to an external display device.

[0009] The auxiliary positioning mechanism includes a slide rail fixed to the outside of the detection housing, a positioning block slidably mounted on the slide rail, a knob on one side of the positioning block, the knob being threadedly connected to the slide rail via a screw, when the knob is rotated, the screw drives the positioning block to move along the slide rail, a contact sensor is provided at the bottom of the positioning block, the contact sensor is electrically connected to the signal processing module, and is used to monitor the position information of the positioning block in real time.

[0010] The detection window contains a detector array, which consists of multiple independent detection units. Each detection unit is connected to a signal acquisition unit via a flexible circuit. The spacing between the detection units is less than 0.5 mm. The surface of each detection unit is coated with a highly sensitive photoelectric conversion material, which can absorb radiation signals of a specific wavelength and convert them into electrical signals.

[0011] As a preferred embodiment of this utility model, a heat sink is provided on the outer side of the detection housing. The heat sink is fixedly connected to the detection housing by thermally conductive adhesive. Several ventilation holes are opened on the surface of the heat sink, and the ventilation holes are evenly distributed along the length of the heat sink. Fan brackets are fixed at both ends of the heat sink, and a miniature fan is installed on the fan bracket. The miniature fan is connected to an external power source through a power cord.

[0012] As a preferred embodiment of this utility model, the outer side of the adjusting sleeve is provided with scale markings, which are used to indicate the displacement of the focusing lens. One end of the adjusting sleeve is provided with a locking nut, which is fixed to the adjusting sleeve by a threaded connection. When the focusing lens is adjusted to a suitable position, the locking nut is rotated to press it against the adjusting sleeve to prevent the focusing lens from shifting.

[0013] As a preferred embodiment of this utility model, the signal processing module further includes a data storage unit, which is connected to an external computer via an interface. The data storage unit has a buffer for temporarily storing unprocessed signal data, and the buffer has a capacity of 1GB-4GB.

[0014] As a preferred technical solution of this utility model, the auxiliary positioning mechanism further includes a limiting block, which is fixed at both ends of the slide rail. The limiting block has a buffer pad on its inner side, which is made of rubber material and is used to prevent the positioning block from hitting the end of the slide rail during movement.

[0015] As a preferred embodiment of this utility model, the top of the detection housing is provided with a handle, which is connected to the detection housing via a hinge. The handle is provided with anti-slip texture, which is evenly distributed along the length of the handle. Both ends of the handle are fixed to the detection housing with bolts.

[0016] As a preferred embodiment of this utility model, the back of the detector array is provided with a shielding layer, the shielding layer is made of metal material, the thickness of the shielding layer is 0.2mm-0.5mm, the surface of the shielding layer is coated with an anti-corrosion coating, and the shielding layer is fixedly connected to the detector array by an adhesive.

[0017] As a preferred embodiment of this utility model, the speed of the miniature fan is adjustable, and the control circuit of the miniature fan is integrated into the signal processing module. The control circuit automatically adjusts the speed of the miniature fan according to the signal fed back by the temperature sensor inside the detection housing. The temperature sensor is connected to the signal processing module through a wire.

[0018] The focusing lens has a displacement range of 0mm-10mm, and its surface is coated with an anti-reflective film with a thickness of 0.1μm-0.3μm. The anti-reflective film is used to reduce the reflection loss of light signals on the lens surface.

[0019] As a preferred embodiment of this utility model, the bottom of the detection housing is provided with a support foot, which is fixedly connected to the detection housing by screws. The bottom of the support foot is provided with an anti-slip pad, which is made of silicone material and has a thickness of 3mm-5mm.

[0020] As a preferred embodiment of this utility model, the input terminal of the signal acquisition unit is provided with a protection circuit. The protection circuit is used to prevent overvoltage signals from damaging the detector array. The protection circuit includes a diode and a resistor. The diode and the resistor are connected in series and then in parallel at the input terminal of the signal acquisition unit.

[0021] The present invention achieves the following effects through the above technical solution:

[0022] The detector array design combines highly sensitive photoelectric conversion materials with finely spaced detection units, significantly improving detection accuracy and response speed.

[0023] The combination of the adjusting sleeve and the focusing lens makes the focal length of the detection window adjustable, adapting to the detection needs of target samples at different depths.

[0024] The auxiliary positioning mechanism, through the cooperation of slide rails and positioning blocks, can accurately locate the position of the detection window, ensuring the accuracy of the detection results;

[0025] The heat sink and miniature fan effectively reduce the temperature inside the detector housing, extending the device's lifespan.

[0026] The introduction of a shielding layer reduces the impact of external electromagnetic interference on the detector array, further improving the reliability of the detection.

[0027] In summary, this invention provides a high-precision radiographic detector suitable for complex medical scenarios by optimizing the design of the detection structure and auxiliary functions, thus meeting the needs of the modern medical field for high-precision and rapid detection. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the layout relationship of the probe assembly, signal processing module and auxiliary positioning mechanism of the detector.

[0029] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle.

[0030] Figure 3 This is a schematic diagram of the focusing lens in this utility model.

[0031] Figure 4 This is a schematic diagram of the slide rail structure in this utility model.

[0032] Figure 5 This is a schematic diagram of the installation of the heat sink and the miniature fan in this utility model, showing the arrangement of the heat sink, ventilation holes and fan bracket.

[0033] Figure 6 This is a schematic diagram of the signal processing module in this utility model.

[0034] The attached figures are labeled as follows:

[0035] 1. Detector housing; 2. Detector window; 3. Adjusting sleeve; 4. Focusing lens; 5. Elastic element; 6. Slide rail; 7. Positioning block; 8. Knob; 9. Contact sensor; 10. Heat sink; 11. Miniature fan; 12. Signal processing module; 13. Detector array; 14. Shielding layer; 15. Support foot. Detailed Implementation

[0036] This utility model relates to a medical radiation detector with a high-precision detection structure, and its specific implementation is described in detail with reference to the accompanying drawings. Figure 1 As shown, the detector includes a probe assembly, a signal processing module 12, and an auxiliary positioning mechanism. The probe assembly consists of a probe housing 1, with a probe window 2 at one end and a mounting base fixed at the other end. An adjusting sleeve 3 is threadedly fixed to the mounting base, and a focusing lens 4 is housed inside the adjusting sleeve 3. The focusing lens 4 and the adjusting sleeve 3 are connected by an elastic element 5. The elastic element 5 is a spring structure, with one end welded to the outer edge of the focusing lens 4 and the other end fixed to the inner wall of the adjusting sleeve 3. When the focusing lens 4 is not subjected to external force, the elastic element 5 maintains its initial position. The surface of the focusing lens 4 is coated with an anti-reflective film with a thickness of 0.1μm-0.3μm to reduce the reflection loss of light signals on the lens surface. The outer side of the adjusting sleeve 3 is marked with scale to indicate the displacement of the focusing lens 4. One end of the adjusting sleeve 3 is equipped with a locking nut, which is fixed to the adjusting sleeve 3 by a threaded connection. When the focusing lens 4 is adjusted to the appropriate position, the locking nut is rotated to press it against the adjusting sleeve 3 to prevent the focusing lens 4 from shifting.

[0037] The signal processing module 12 includes a signal acquisition unit and a signal amplification unit. The signal acquisition unit is electrically connected to the detector array 13 within the detection window 2 via wires, and the signal amplification unit is connected to the signal acquisition unit via a multi-layer circuit board. The multi-layer circuit board includes a filtering circuit and an analog-to-digital conversion circuit. The filtering circuit, composed of resistors and capacitors, is used to remove noise signals. The analog-to-digital conversion circuit converts the analog signal into a digital signal and transmits it to an external display device. The signal processing module 12 also includes a data storage unit, which is connected to an external computer via an interface. The data storage unit contains a buffer for temporarily storing unprocessed signal data, with a capacity of 1GB-4GB. The input terminal of the signal acquisition unit has a protection circuit, composed of diodes and resistors. The diodes and resistors are connected in series and then in parallel at the input terminal of the signal acquisition unit to prevent overvoltage signals from damaging the detector array 13.

[0038] The auxiliary positioning mechanism includes a slide rail 6, which is fixed to the outside of the detection housing 1. A positioning block 7 is slidably mounted on the slide rail 6. A knob 8 is provided on one side of the positioning block 7, and the knob 8 is threadedly connected to the slide rail 6 via a screw. When the knob 8 is rotated, the screw drives the positioning block 7 to move along the slide rail 6. A contact sensor 9 is provided at the bottom of the positioning block 7, and the contact sensor 9 is electrically connected to the signal processing module 12 via a wire for real-time monitoring of the position information of the positioning block 7. The auxiliary positioning mechanism also includes limit blocks, which are fixed to both ends of the slide rail 6. A buffer pad made of rubber is provided on the inner side of the limit block to prevent the positioning block 7 from impacting the end of the slide rail 6 during movement.

[0039] like Figure 2 As shown, a detector array 13 is provided within the detection window 2. The detector array 13 consists of multiple independent detection units, each of which is connected to a signal acquisition unit via a flexible circuit. The spacing between the detection units is less than 0.5 mm. The surface of each detection unit is coated with a highly sensitive photoelectric conversion material, which can absorb radiation signals of a specific wavelength and convert them into electrical signals. A shielding layer 14 is provided on the back of the detector array 13. The shielding layer 14 is made of metal and has a thickness of 0.2 mm to 0.5 mm. The surface of the shielding layer 14 is coated with an anti-corrosion coating. The shielding layer 14 is fixedly connected to the detector array 13 with adhesive.

[0040] like Figure 3As shown, the slide rail 6 has a sliding groove for the positioning block 7 along its length. The width of the sliding groove is slightly larger than the width of the positioning block 7 to ensure that the positioning block 7 can slide smoothly on the slide rail 6. The screw of the knob 8 engages with the threaded hole of the slide rail 6. The screw pitch is 1mm. For every rotation of the knob 8, the positioning block 7 moves 1mm along the slide rail 6. The contact sensor 9 is fixed to the bottom end of the positioning block 7. The sensing surface of the contact sensor 9 faces the outside of the slide rail 6. The contact sensor 9 is connected to the signal processing module 12 via a wire. The output signal of the contact sensor 9 is processed by the signal processing module 12 and then transmitted to the external display device.

[0041] like Figure 4 As shown, the detector array 13 has its detector elements arranged in a rectangular pattern, each element measuring 1mm × 1mm, with a spacing of 0.4mm between elements. The surface of each detector element is coated with a photoelectric conversion material, 0.1mm thick, with an absorption wavelength range of 300nm-800nm. The detector array 13 is connected to the signal acquisition unit via a flexible circuit. The flexible circuit has a width of 0.2mm, a thickness of 0.1mm, and its length is determined based on the distance between the detector array 13 and the signal acquisition unit.

[0042] like Figure 5 As shown, a heat sink 10 is provided on the outer side of the detection housing 1. The heat sink 10 is fixedly connected to the detection housing 1 by thermally conductive adhesive. Several ventilation holes are opened on the surface of the heat sink 10, and the ventilation holes are evenly distributed along the length of the heat sink 10. Fan brackets are fixed to both ends of the heat sink 10, and miniature fans 11 are mounted on the fan brackets. The miniature fans 11 are connected to an external power source through a power cord. The speed of the miniature fans 11 is adjustable. The control circuit of the miniature fans 11 is integrated into the signal processing module 12. The control circuit automatically adjusts the speed of the miniature fans 11 according to the signal fed back by the temperature sensor inside the detection housing 1. The temperature sensor is connected to the signal processing module 12 through a wire.

[0043] like Figure 6 As shown, the circuit block diagram of the signal processing module 12 includes a signal acquisition unit, a filtering circuit, a signal amplification unit, an analog-to-digital converter (ADC), and a data storage unit. The signal acquisition unit is connected to the detector array 13 via wires. The output of the signal acquisition unit is connected to the input of the filtering circuit, the output of the filtering circuit is connected to the input of the signal amplification unit, the output of the signal amplification unit is connected to the input of the ADC, and the output of the ADC is connected to the input of the data storage unit. The data storage unit is connected to an external computer via an interface, and its buffer capacity is 2GB.

[0044] The top of the detector housing 1 is equipped with a handle, which is connected to the detector housing 1 via a hinge. The handle has anti-slip textures that are evenly distributed along the length of the handle. Both ends of the handle are fixed to the detector housing 1 with bolts. The bottom of the detector housing 1 is equipped with support feet 15, which are fixed to the detector housing 1 with screws. The bottom of the support feet 15 is equipped with anti-slip pads made of silicone material with a thickness of 4mm.

[0045] The focusing lens 4 has a displacement range of 0mm-10mm, a diameter of 20mm, and a focal length of 50mm. The displacement of the focusing lens 4 is indicated by scale markings on the adjusting sleeve 3, with a minimum scale division of 0.1mm. The surface of the focusing lens 4 is coated with an anti-reflective film with a thickness of 0.2μm and a refractive index of 1.45. A retaining ring is provided at the edge of the focusing lens 4, which is fixedly connected to the focusing lens 4 by screws. The retaining ring has an outer diameter of 22mm and a thickness of 1mm.

[0046] The signal processing module 12's multilayer circuit board consists of four layers: a signal layer, a power layer, a ground layer, and a control layer. The multilayer circuit board measures 100mm × 50mm and has a thickness of 1.6mm. The filtering circuit on the multilayer circuit board consists of two capacitors and one inductor; the capacitors have a capacitance of 10μF, and the inductor has an inductance of 100μH. The analog-to-digital converter (ADC) has a resolution of 12 bits and a sampling frequency of 1MHz.

[0047] The detector array 13 has 100 × 100 detection units, with a total area of ​​100 mm × 100 mm. The detector array 13 has 100 flexible circuits, each connecting 100 detection units. The total length of the flexible circuits is 1 m, and the total width is 20 mm. The shielding layer 14 of the detector array 13 is made of aluminum, with a thickness of 0.3 mm, and its surface is coated with an epoxy resin coating with a thickness of 0.1 mm.

[0048] The heatsink 10 is 200mm long, 50mm wide, and 2mm thick. It has 10 ventilation holes, each 5mm in diameter, spaced 20mm apart. A fan bracket is fixed to each end of the heatsink 10; the bracket is 10mm high, 50mm wide, and 2mm thick. The miniature fan 11 has a diameter of 40mm, a thickness of 10mm, and a speed range of 1000rpm-5000rpm.

[0049] The auxiliary positioning mechanism has a slide rail 6 with a length of 150mm, a width of 20mm, and a thickness of 5mm. There is one positioning block 7 on the slide rail 6, with a length of 20mm, a width of 15mm, and a thickness of 5mm. There is one contact sensor 9 on the positioning block 7, with a diameter of 5mm and a thickness of 2mm. There are two limiting blocks at both ends of the slide rail 6, with a length of 10mm, a width of 20mm, and a thickness of 5mm. The buffer pads on the limiting blocks are 2mm thick and have a hardness of 50 Shore A.

[0050] The detector housing 1 has a length of 300mm, a width of 150mm, and a thickness of 50mm. It is made of aluminum alloy, and its surface is anodized to a surface hardness of HV200. The top handle of the detector housing 1 has a length of 100mm, a width of 20mm, and a thickness of 5mm. The anti-slip texture on the handle has a depth of 1mm and a spacing of 2mm. The bottom of the detector housing 1 has four support feet 15, each with a diameter of 10mm and a height of 15mm. The anti-slip pads on the support feet 15 have a diameter of 20mm, a thickness of 4mm, and a hardness of 40 Shore A.

[0051] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0052] In medical radiology testing, when performing high-precision detection of minute radiation dose distribution of implants in a patient, the detector must first be placed near the area to be tested. Stability is ensured by the support feet 15 and anti-slip pads on the bottom of the detector housing 1. The silicone anti-slip pads on the support feet 15 effectively prevent displacement of the device on smooth surfaces. Subsequently, the operator can use the handle to adjust the device to a suitable position. The anti-slip texture on the handle further enhances grip stability and prevents slippage during operation.

[0053] To ensure that the detection window 2 is aligned with the target area, precise positioning is required using an auxiliary positioning mechanism. First, rotate knob 8 to move the screw, which in turn moves the positioning block 7 along slide rail 6. Since slide rail 6 has graduated markings, and contact sensor 9 monitors the position of positioning block 7 in real time and transmits the signal to signal processing module 12, the specific position of positioning block 7 can be observed through an external display device. When positioning block 7 contacts the edge of the target area, contact sensor 9 outputs a signal and feeds it back to signal processing module 12, thus determining the initial position of detection window 2. This process ensures the accurate relative position between detection window 2 and the target area.

[0054] After initial positioning, the focusing lens 4 needs to be adjusted to accommodate target samples at different depths. By rotating the adjusting sleeve 3, the focusing lens 4 moves axially, and the elastic element 5 provides appropriate rebound force to ensure smooth movement of the focusing lens 4. The scale markings on the adjusting sleeve 3 indicate the displacement of the focusing lens 4, with a minimum scale of 0.1 mm to ensure adjustment accuracy. Once the focusing lens 4 is adjusted to the appropriate position, the locking nut is rotated to press it against the adjusting sleeve 3, preventing displacement of the focusing lens 4. The surface of the focusing lens 4 is coated with an anti-reflective film with a thickness of 0.2 μm and a refractive index of 1.45, which significantly reduces the reflection loss of light signals on the lens surface, thereby improving the intensity and clarity of the detection signal.

[0055] Subsequently, detector array 13 begins receiving radiation signals emitted from the target area. Detector array 13 consists of 100×100 independent detection units, each measuring 1mm×1mm with a spacing of 0.4mm. The photoelectric conversion material coated on the surface of the detection units is 0.1mm thick, absorbing wavelengths in the range of 300nm-800nm, and can efficiently absorb radiation signals of specific wavelengths and convert them into electrical signals. A flexible circuit transmits the electrical signals acquired by the detection units to the signal acquisition unit. The flexible circuit is 0.2mm wide, 0.1mm thick, and its total length is designed to be 1m according to actual requirements, ensuring the stability and reliability of signal transmission.

[0056] After receiving the electrical signal, the signal acquisition unit removes noise signals through a filtering circuit on a multi-layer circuit board. The filtering circuit consists of two capacitors (10μF) and one inductor (100μH), effectively filtering out high-frequency interference signals. The filtered signal then enters the signal amplification unit, where it is amplified to a suitable amplitude for processing by the analog-to-digital converter (ADC). The ADC converts the analog signal into a digital signal at a sampling frequency of 1MHz, achieving a resolution of 12 bits to ensure accurate digitization. Finally, the digital signal is temporarily stored in a data storage unit with a 2GB buffer capacity to handle sudden large-scale data storage demands.

[0057] During prolonged operation, the internal components of the detector housing 1 may generate heat due to the operation of electronic components. At this time, the heat sink 10 conducts the heat from the detector housing 1 to the external environment via thermally conductive adhesive. Ten evenly distributed ventilation holes, each 5mm in diameter and spaced 20mm apart, on the surface of the heat sink 10 promote airflow. The miniature fan 11 automatically adjusts its speed based on feedback from the temperature sensor, with a speed range of 1000rpm-5000rpm, effectively reducing the internal temperature of the detector housing 1 and extending the equipment's lifespan.

[0058] Furthermore, the shielding layer 14 on the back of the detector array 13 is made of aluminum with a thickness of 0.3 mm and coated with an epoxy resin layer with a thickness of 0.1 mm. The shielding layer 14 effectively reduces the influence of external electromagnetic interference on the detector array 13, ensuring the accuracy of the detection results. At the same time, the anti-corrosion coating of the shielding layer 14 improves its durability and makes it suitable for various complex environments.

[0059] In summary, through the above steps and principles, this invention enables high-precision and rapid detection of target samples in complex medical scenarios. The coordinated operation of each component not only improves detection accuracy and response speed but also optimizes the operational efficiency and reliability of the equipment, meeting the demands of modern medical fields for high-precision radiological detection.

Claims

1. A medical radiation detector with a high-precision detection structure, characterized in that: The system includes a probe assembly, a signal processing module (12), and an auxiliary positioning mechanism. The probe assembly includes a probe housing (1), one end of which has a probe window (2), and the other end is fixed with a mounting base. An adjusting sleeve (3) is fixed to the mounting base via a threaded connection. A focusing lens (4) that can move axially is provided inside the adjusting sleeve (3), and the focusing lens (4) is connected to the adjusting sleeve (3) via an elastic element (5). The signal processing module (12) includes a signal acquisition unit and a signal amplification unit. The signal acquisition unit is connected to the probe window (2) via a wire. The detector array (13) inside is electrically connected. The signal amplification unit is connected to the signal acquisition unit through a multi-layer circuit board. The multi-layer circuit board is provided with a filter circuit and an analog-to-digital conversion circuit. The auxiliary positioning mechanism includes a slide rail (6) fixed on the outside of the detector housing (1). A positioning block (7) is slidably installed on the slide rail (6). A knob (8) is provided on one side of the positioning block (7). The knob (8) is threadedly connected to the slide rail (6) through a screw. A contact sensor (9) is provided at the bottom of the positioning block (7). The contact sensor (9) is electrically connected to the signal processing module (12).

2. The medical radiation detector according to claim 1, characterized in that: The detection window (2) is provided with a detector array (13), which is composed of multiple independent detection units. Each detection unit is connected to the signal acquisition unit through a flexible circuit. The spacing between the detection units is 0.4 mm. The surface of the detection unit is coated with a photoelectric conversion material. The photoelectric conversion material can absorb radiation signals with a wavelength range of 300 nanometers to 800 nanometers and convert them into electrical signals.

3. The medical radiation detector according to claim 1, characterized in that: The outer side of the detection housing (1) is provided with a heat sink (10), which is fixedly connected to the detection housing (1) by thermally conductive adhesive. Several ventilation holes are opened on the surface of the heat sink (10), and fan brackets are fixed at both ends of the heat sink (10). A miniature fan (11) is installed on the fan bracket.

4. The medical radiation detector according to claim 1, characterized in that: The outer side of the adjusting sleeve (3) is provided with scale markings, and one end of the adjusting sleeve (3) is provided with a locking nut. The locking nut is fixed to the adjusting sleeve (3) by threaded connection.

5. The medical radiation detector according to claim 1, characterized in that: The signal processing module (12) further includes a data storage unit, which is connected to an external computer via an interface. The data storage unit has a buffer with a capacity of 2GB.

6. The medical radiation detector according to claim 1, characterized in that: The auxiliary positioning mechanism also includes a limiting block, which is fixed at both ends of the slide rail (6). The inner side of the limiting block is provided with a buffer pad, which is made of rubber material.

7. The medical radiation detector according to claim 1, characterized in that: The top of the detection housing (1) is provided with a handle, which is connected to the detection housing (1) by a hinge. The handle is provided with anti-slip texture, and both ends of the handle are fixed to the detection housing (1) by bolts.

8. The medical radiation detector according to claim 1, characterized in that: The back of the detector array (13) is provided with a shielding layer (14), which is made of aluminum material and has a thickness of 0.3 mm. The surface of the shielding layer (14) is coated with an epoxy resin coating.

9. The medical radiation detector according to claim 1, characterized in that: The bottom of the detection housing (1) is provided with a support foot (15), which is fixedly connected to the detection housing (1) by screws. The bottom of the support foot (15) is provided with an anti-slip pad, which is made of silicone material and has a thickness of 4 mm.

10. The medical radiation detector according to claim 1, characterized in that: The input terminal of the signal acquisition unit is equipped with a protection circuit, which includes a diode and a resistor. The diode and the resistor are connected in series and then in parallel at the input terminal of the signal acquisition unit.

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