A splicing adjustable knee joint magnetic resonance coil system

Abstract

The application relates to the technical field of magnetic resonance imaging, and discloses a spliced adjustable knee joint magnetic resonance coil system, which comprises a bed plate, a main supporting block and a connecting block are symmetrically arranged above the bed plate, clamping grooves are symmetrically arranged on the top of the connecting block, expansion blocks are arranged in the clamping grooves of the connecting block, fixed plates are fixedly connected to the left and right sides of the connecting block, threaded rods are rotationally connected to the inside of one end of the fixed plates, hand wheels are fixedly connected to the outer walls of the threaded rods, clamping blocks are screw-connected to the top of the threaded rods, the bottom of a guide rod is fixedly connected to the top of the fixed plate, and supporting plates are fixedly connected to the left and right sides of the connecting block. The number of the expansion blocks is increased or decreased to realize the step-by-step adjustment of the inner diameter of a containing cavity, pain, compression and soft tissue injury caused by forcibly inserting a hard coil into a small aperture are avoided, and the problem that a patient with a large girth cannot enter the coil can be solved.

Description

Technical Field

[0001] This invention relates to the field of magnetic resonance imaging technology, specifically to a spliced ​​adjustable knee joint magnetic resonance coil system. Background Technology

[0002] Magnetic resonance imaging (MRI) technology is characterized by the absence of ionizing radiation, non-invasiveness, rich imaging parameters, and arbitrary selection of imaging planes. This technology has high soft tissue resolution and can perform multi-planar and multi-sequence imaging. It is particularly advantageous for treating degenerative and sports-related lesions of the knee joint meniscus, ligaments, synovium, and cartilage. Currently, traditional knee joint MRI examinations use dedicated rigid coils, while clinically commonly used knee joint MRI coils mostly adopt an integrated closed cylindrical structure.

[0003] Traditional magnetic resonance imaging (MRI) coils often have a fixed aperture, making it impossible to fit conventional coils into larger patients or those with large knee circumferences, leading to an increased failure rate. Forcibly inserting a small-aperture coil can cause pain, pressure, and even soft tissue damage, reducing patient comfort during the examination. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a splicing adjustable knee joint magnetic resonance coil system. This system solves the problems that traditional magnetic resonance coils often have fixed aperture structures, making it impossible to fit conventional coils into larger patients or those with large circumferences, leading to increased examination failure rates. Forcibly inserting small-aperture coils can cause pain, pressure, and even soft tissue damage, reducing patient comfort during examinations.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a modular adjustable knee joint magnetic resonance coil system, comprising a bed board, with a main support block and a connecting block symmetrically arranged on the upper part of the bed board. The top of each connecting block has symmetrically formed slots, and each slot contains an expansion block. The bottom of each connecting block is positioned within a groove in the expansion block. Fixing plates are fixedly connected to both sides of each connecting block. A threaded rod is rotatably connected to one end of each fixing plate. A handwheel is fixedly connected to the outer wall of the threaded rod. A locking block is threadedly connected to the top of the threaded rod. A guide rod is slidably connected to one end of each locking block. The bottom of the guide rod is fixedly connected to the top of the fixing plate. Support plates are fixedly connected to both sides of each connecting block. Positioning grooves are formed inside each support plate. An elastic support assembly is installed inside the bed board. A drive assembly is installed at the bottom of the threaded rod.

[0006] By adopting the above technical solution, the aperture can be adjusted according to the patient's body size. For regular patients, no expansion blocks are needed. The bottom positioning boss of the connecting block is aligned with the top slot of the main support block and pressed down for pre-positioning. The handwheel is turned to drive the threaded rod to rotate. The locking block moves vertically downward under the limit of the guide rod and locks into the positioning slot of the connecting block support plate, so that the splicing surfaces of the main support block and the connecting block fit tightly to form a standard receiving cavity. For patients with large circumferences, the corresponding number of expansion blocks are clamped between the main support block and the connecting block. After pre-positioning, the above locking steps are repeated. By increasing or decreasing the number of expansion blocks, the inner diameter of the receiving cavity can be adjusted in stages, avoiding the pain, pressure and soft tissue damage caused by forcibly inserting a small-diameter rigid coil. At the same time, it can solve the problem that patients with large circumferences cannot insert the coil.

[0007] Preferably, the drive assembly includes two rotating rods, the tops of which are fixedly connected to the bottom of the threaded rod. One of the rotating rods has a gear one mounted on its outer wall, the tooth end of which is meshed with a toothed belt. One end of the toothed belt has a gear two meshed with its inner wall, and the inner wall of the gear two is fixedly connected to the outer wall of the other rotating rod. The outer wall of the toothed belt extends through the bottom of the main support block.

[0008] Preferably, the elastic support assembly includes a sliding block, the top of which is fixedly connected to the bottom of the main support block. The bed board has an internal receiving groove, the outer wall of which is slidably connected to the receiving groove. A connecting plate is fixedly connected to the bottom of the sliding block. Sliding rods are uniformly fixedly connected to the receiving groove of the bed board. Rod holes are uniformly opened inside the connecting plate, and the outer walls of the sliding rods are slidably connected to the rod holes. Springs are uniformly fixedly connected to the bottom of the connecting plate, the bottom of which is fixedly connected to the receiving groove, and the inner wall of which is sleeved on the outer wall of the sliding rod.

[0009] Preferably, the inner walls of the main support block, connecting block, and expansion block are all equipped with radio frequency receiving coil arrays. The radio frequency receiving coil arrays are used to receive magnetic resonance signals emitted by the knee joint. The radio frequency receiving coil arrays are distributed in a matrix on the inner sidewalls of the main support block, connecting block, and expansion block. The radio frequency receiving coil arrays at the joints of adjacent expansion blocks with the main support block and connecting block are electrically connected and decoupled through flexible electrical cables or sliding contact structures. The radio frequency receiving coil array includes multiple independent resonant circuits for transmitting and receiving or receiving. The resonant circuit is composed of copper wires, distributed capacitance, and detuning circuits.

[0010] Preferably, a flexible buffer layer is provided on one side of the radio frequency receiving coil array. The outer wall of the flexible buffer layer is fixedly connected to the inner wall of the main support block, the connecting block and the expansion block, respectively. The flexible buffer layer is made of soft medical electrical insulation material.

[0011] Preferably, a signal transmission interface is provided on one side of the main support block. The signal transmission interface is electrically connected to the radio frequency receiving coil array. The signal transmission interface transmits the received magnetic resonance signal to the magnetic resonance scanning device through a bundled radio frequency coaxial cable.

[0012] Preferably, the top of the bed board is symmetrically fixedly connected with sleeves, the inside of each sleeve is slidably connected with a piston plate, the bottom of the piston plate is fixedly connected with a piston rod, the outer wall of the piston rod is slidably connected to the top of the bed board, and the bottom of the piston rod is fixedly connected to the top of the connecting plate.

[0013] Preferably, an inlet pipe is fixedly connected to the top of the sleeve, an inlet valve is installed on the outer wall of the inlet pipe, an outlet pipe is fixedly connected to the outer wall of the sleeve, and an outlet valve is fixedly connected to one end of the outlet pipe.

[0014] Preferably, the other end of the liquid outlet pipe is fixedly connected to a delivery pipe, the outer wall of the delivery pipe is fixedly connected to the inner wall of the main support block, and nozzles are uniformly fixedly connected to the outer wall of the delivery pipe. The outer wall of the nozzles is disposed within the flexible buffer pad layer of the main support block.

[0015] Preferably, the main support block and the connecting block both adopt a rigid load-bearing shell, the extension block adopts a rigid lightweight shell, and the main support block, the connecting block and the extension block are all made of carbon fiber composite material.

[0016] Working principle: Adjust the aperture according to the patient's body size. For regular patients, no expansion block is needed. Align the bottom positioning boss of the connecting block with the top slot of the main support block and press it down to position. Turn the handwheel to drive the threaded rod to rotate. The block moves vertically down under the limit of the guide rod and is inserted into the positioning slot of the connecting block support plate, so that the splicing surface of the main support block and the connecting block fits tightly to form a standard receiving cavity. For patients with large circumference, insert the corresponding number of extension blocks between the main support block and the connecting block, and repeat the above locking steps after completing the pre-positioning. During the locking process, the threaded rod drives the bottom rotating rod and gear one to rotate, and the gear two and the rotating rod on the other side rotate synchronously through the toothed belt drive, so that the two locking blocks on both sides lock synchronously; The patient lies supine with their knee joint placed in the coil and their lower leg placed on a flexible cushioning layer. The weight of the leg causes the main support block, sliding block, and connecting plate to move down the slide rod and compress the spring. The spring stops when the elastic force and gravity are balanced. At the same time, the sliding contact plate connectors of adjacent modules automatically connect to form a complete radio frequency receiving coil array. The transmission signal interface sends a splicing status signal to the MRI host. The device automatically calls the corresponding scanning parameters, the MRI emits radio frequency pulses, and the coil array receives the magnetic resonance signal and transmits it to the host to generate a tomographic image. After the patient leaves after the scan is completed, the spring rebounds and drives the main support block to reset. At the same time, the connecting plate drives the piston rod and piston plate to move up, sending the pre-stored disinfectant in the sleeve to the atomizing nozzle through the delivery pipe, and the inner wall of the coil is automatically disinfected after spraying.

[0017] This invention provides a modular adjustable knee joint magnetic resonance coil system. It offers the following advantages: 1. This invention adjusts the aperture according to the patient's body size. For regular patients, no expansion blocks are needed. The bottom positioning boss of the connecting block is aligned with the top slot of the main support block and pressed down for pre-positioning. The handwheel is turned to drive the threaded rod to rotate. The locking block moves vertically downward under the limit of the guide rod and locks into the positioning slot of the connecting block support plate, so that the splicing surfaces of the main support block and the connecting block fit tightly to form a standard receiving cavity. For patients with larger circumferences, a corresponding number of expansion blocks are clamped between the main support block and the connecting block. After pre-positioning, the above locking steps are repeated. By increasing or decreasing the number of expansion blocks, the inner diameter of the receiving cavity can be adjusted in stages, avoiding the pain, pressure and soft tissue damage caused by forcibly inserting a small-diameter rigid coil. At the same time, it can solve the problem that patients with larger circumferences cannot insert the coil.

[0018] 2. In this invention, the patient lies supine with their knee joint placed within the concave arc of the main support block, and their lower leg naturally rests on the flexible cushioning layer at the bottom of the main support block. Under the weight of the patient's leg, the main support block drives the sliding block at the bottom to slide vertically downward along the receiving groove of the bed board. The sliding block drives the connecting plate to move downward synchronously along the sliding rod, compressing multiple sets of springs at the bottom. When the elastic force of the springs reaches equilibrium with the weight of the patient's leg, the main support block stops sinking, thus filling the ineffective gap between the bottom of the main support block and the lower side of the lower leg, preventing the knee joint from swaying in the front and back directions and motion artifacts during scanning.

[0019] 3. In this invention, when the connecting plate moves downward, it drives the piston rod to move downward synchronously. The piston rod drives the piston plate to slide downward within the sleeve. At this time, the inlet valve opens and the outlet valve closes. External disinfectant enters the sleeve through the inlet pipe under negative pressure for storage. After scanning, the patient pulls their leg out of the coil, the main support block loses its gravity load, and the compressed spring rebounds, driving the connecting plate and sliding block to move vertically upward along the slide rod, eventually returning to the initial position. As the connecting plate moves upward, it drives the piston rods and piston plates on both sides to move upward synchronously. At this time, the inlet valve automatically closes and the outlet valve automatically opens. The piston plate squeezes the pre-stored medical disinfectant in the sleeve into the outlet pipe. The disinfectant is then distributed through the delivery pipe to multiple atomizing nozzles on the inner wall of the main support block, evenly spraying it inside the main support block, thus achieving automatic disinfection of the area where the inner wall of the coil contacts the patient, without the need for manual wiping. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural diagram of the connecting block of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic cross-sectional view of the bed board structure of the present invention; Figure 5 This is a schematic diagram of a partial structure of the card block of the present invention; Figure 6 for Figure 5 Enlarged structural diagram at point B; Figure 7 This is a partial structural diagram of the flexible buffer pad layer of the present invention; Figure 8 This is a schematic diagram of the connection structure between the main support block, the connecting block, and the expansion block of the present invention. Figure 9 This is a schematic diagram of the connection structure between the main support block and the connecting block of the present invention.

[0021] The components include: 1. Bed board; 2001. Handwheel; 2. Main support block; 201. Connecting block; 202. Slot; 203. Extension block; 204. Fixing plate; 205. Threaded rod; 206. Locking block; 207. Guide rod; 208. Support plate; 209. Positioning slot; 210. Rotating rod; 211. Gear one; 212. Toothed belt; 213. Gear two; 3. Sliding block; 301. Connecting plate; 302. Slide rod; 303. Spring; 4. Radio frequency receiving coil array; 401. Flexible buffer pad; 402. Transmission signal interface; 5. Sleeve; 501. Piston plate; 502. Piston rod; 503. Inlet pipe; 504. Inlet valve; 505. Outlet pipe; 506. Outlet valve; 507. Delivery pipe; 508. Nozzle. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 -Appendix Figure 9This invention provides a modular adjustable knee joint magnetic resonance coil system, including a bed board 1. A main support block 2 and a connecting block 201 are symmetrically arranged on the upper part of the bed board 1. The top of the connecting block 201 has symmetrically formed slots 202, and each slot 202 contains an extension block 203. The bottom of the connecting block 201 is located within a groove in the extension block 203. Fixing plates 204 are fixedly connected to both sides of the connecting block 201, and each end of the fixing plate 204 has a rotatably threaded connection. The outer wall of the threaded rod 205 is fixedly connected to a handwheel 2001. The top of the threaded rod 205 is threadedly connected to a locking block 206. One end of the locking block 206 is internally slidably connected to a guide rod 207. The bottom of the guide rod 207 is fixedly connected to the top of the fixing plate 204. Support plates 208 are fixedly connected to both sides of the connecting block 201. The support plate 208 has a positioning groove 209 inside. An elastic support assembly is installed inside the bed board 1. A drive assembly is installed at the bottom of the threaded rod 205.

[0024] Specifically, for regular patients, when the expansion block 203 is not needed, the connecting block 201 is directly connected to the main support block 2. The positioning boss at the bottom of the connecting block 201 is aligned with the slot 202 at the top of the main support block 2, and the pre-positioning is completed by pressing down vertically. Then, the handwheel 2001 is turned to drive the threaded rod 205 to rotate. When the threaded rod 205 rotates synchronously, the locking block 206 moves vertically downward under the limit of the guide rod 207 and finally locks into the positioning slots 209 of the support plates 208 on both sides of the connecting block 201. When the locking block 206 is fully locked into the positioning slots 209, the splicing surfaces of the main support block 2 and the connecting block 201 fit tightly together to form a standard cylindrical receiving cavity. For patients with large body weight and circumference, when it is necessary to enlarge the inner diameter of the MRI coil, at least one set of two extension blocks 203 needs to be clamped between the main support block 2 and the connecting block 201. The positioning bosses at the bottom of the two extension blocks 203 are aligned with the slots 202 at the top of the main support block 2 to complete the overall pre-positioning. Then, the above synchronous locking steps are repeated. The handwheel 2001 is rotated to engage the locking block 206 into the positioning slot 209, achieving rigid overall locking of the main support block 2, extension blocks 203, and connecting block 201. This can be achieved by adding or removing extension blocks. The number of blocks 203 enables graded adjustment of the inner diameter of the receiving cavity, avoiding pain, pressure, and soft tissue damage caused by forcibly inserting small-diameter rigid coils. It also solves the problem of large-circumference patients being unable to insert coils. The elastic support component fills the ineffective gap between the bottom of the main support block 2 and the lower side of the calf, preventing the knee joint from swaying and motion artifacts in the forward and backward directions during scanning. The drive component enables the rapid and synchronous locking of the two side locking blocks 206, ensuring that the modules fit tightly and are accurately positioned after splicing.

[0025] Please see the appendix Figure 1 -Appendix Figure 5The drive assembly includes two rotating rods 210. The top of each rotating rod 210 is fixedly connected to the bottom of a threaded rod 205. A gear 211 is mounted on the outer wall of one of the rotating rods 210. The tooth end of the gear 211 is meshed with a toothed belt 212. A gear 213 is meshed with the inner wall of one end of the toothed belt 212. The inner wall of the gear 213 is fixedly connected to the outer wall of the other rotating rod 210. The outer wall of the toothed belt 212 extends through the bottom of the main support block 2.

[0026] Specifically, during the locking process, when the threaded rod 205 rotates, it drives the rotating rod 210 at its bottom to rotate synchronously. The rotating rod 210 drives the gear one 211 to rotate, and through the meshing transmission of the toothed belt 212, it causes the gear two 213 to rotate. The gear two 213 then drives another rotating rod 210 to rotate, thereby causing the threaded rods 205 on both sides of the main support block 2 to rotate synchronously, realizing the rapid synchronous locking of the two side locking blocks 206, ensuring that the modules fit tightly and are accurately positioned after splicing.

[0027] Please see the appendix Figure 1 -Appendix Figure 5 Appendix Figure 8 -Appendix Figure 9 The elastic support assembly includes a sliding block 3, the top of which is fixedly connected to the bottom of the main support block 2. The bed board 1 has an internal receiving groove, the outer wall of the sliding block 3 is slidably connected to the receiving groove, the bottom of the sliding block 3 is fixedly connected to a connecting plate 301, slide rods 302 are uniformly fixedly connected to the receiving groove of the bed board 1, the connecting plate 301 has uniformly opened rod holes, the outer walls of the slide rods 302 are slidably connected to the rod holes, the bottom of the connecting plate 301 is uniformly fixedly connected to a spring 303, the bottom of the spring 303 is fixedly connected to the receiving groove, and the inner wall of the spring 303 is sleeved on the outer wall of the slide rod 302.

[0028] Specifically, the patient lies supine with their knee joint placed within the concave arc of the main support block 2, and their lower leg rests naturally on the flexible cushioning pad 401 at the bottom of the main support block 2. Under the weight of the patient's leg, the main support block 2 drives the sliding block 3 at the bottom to slide vertically downward along the receiving groove of the bed board 1. The sliding block 3 drives the connecting plate 301 to move downward synchronously along the slide rod 302, compressing the multiple sets of springs 303 at the bottom. When the elastic force of the springs 303 reaches equilibrium with the weight of the patient's leg, the main support block 2 stops sinking, thus filling the ineffective gap between the bottom of the main support block 2 and the lower side of the lower leg, preventing the knee joint from swaying in the front and back direction and motion artifacts during the scanning process. After the patient leaves, the springs 303 rebound, and the main support block 2 returns to its initial position.

[0029] Please see the appendix Figure 2 Appendix Figure 5 Appendix Figure 7 Appendix Figure 8The inner walls of the main support block 2, the connecting block 201, and the expansion block 203 are all equipped with radio frequency receiving coil arrays 4. The radio frequency receiving coil arrays 4 are used to receive magnetic resonance signals emitted by the knee joint. The radio frequency receiving coil arrays 4 are distributed in a matrix on the inner walls of the main support block 2, the connecting block 201, and the expansion block 203. The radio frequency receiving coil arrays 4 at the splicing points of adjacent expansion blocks 203 and main support blocks 2 and connecting blocks 201 are electrically connected and decoupled through flexible electrical cables or sliding contact structures. The radio frequency receiving coil arrays 4 include multiple independent resonant circuits for transmitting and receiving or receiving. The resonant circuits are composed of copper wires, distributed capacitance, and detuning circuits. A signal transmission interface 402 is provided on one side of the main support block 2. The signal transmission interface 402 is electrically connected to the radio frequency receiving coil array 4. The signal transmission interface 402 transmits the received magnetic resonance signal to the magnetic resonance scanning device through the bundled radio frequency coaxial cable.

[0030] Specifically, while the main support block 2 and the connecting block 201 or the main support block 2, the expansion block 203 and the connecting block 201 are locked together, the sliding contact electrical connectors on the splicing surfaces of adjacent modules automatically connect and conduct. The radio frequency receiving coil array 4 on the inner wall of the main support block 2, the expansion block 203 and the connecting block 201 form a complete ring receiving matrix. The transmission signal interface 402 can also automatically detect the splicing status and the number of coil channels, and send an identification signal to the MRI equipment host. The MRI equipment automatically calls the optimal scanning sequence and parameters in the corresponding aperture mode, without the need for manual settings by the technician. The MRI device emits radio frequency pulses through a body coil, which excite hydrogen protons in the knee joint tissue to generate magnetic resonance signals. A multi-channel radio frequency receiving coil array 4, distributed on the inner walls of the main support block 2, the extension block 203, and the connecting block 201, simultaneously receives magnetic resonance signals from different directions of the knee joint. Since the knee joint is located at the near-field center of the coil, and the flexible buffer layer 401 minimizes the distance between the coil and the target area, the signal attenuation is reduced compared to body coil scanning, and the image signal-to-noise ratio is improved. During the scanning process, the detuning circuit automatically blocks the induced current in the coil during the radio frequency emission stage to prevent the coil from overheating. During the signal reception stage, it automatically switches to the resonant state to ensure signal reception sensitivity. All received signals are transmitted to the MRI device host through the bundled radio frequency coaxial cable via the transmission signal interface 402. After image processing, a tomographic image of the knee joint is generated. The generated image can clearly display fine structures such as the meniscus, cruciate ligaments, cartilage, and bone marrow edema, meeting the diagnostic needs of early lesions.

[0031] Please see the appendix Figure 7 A flexible buffer layer 401 is provided on one side of the radio frequency receiving coil array 4. The outer wall of the flexible buffer layer 401 is fixedly connected to the inner wall of the main support block 2, the connecting block 201 and the expansion block 203 respectively. The flexible buffer layer 401 is made of soft medical electrical insulation material.

[0032] Specifically, the flexible buffer layer 401 is made of soft medical electrical insulation material, using medical-grade polyurethane foam or silicone foam with a thickness of 5mm-15mm. The flexible buffer layer 401 is located between the RF receiving coil array 4 and the contact surface of the patient's knee joint. When the patient's leg is placed in the coil, the flexible buffer layer 401 is deformed under pressure, eliminating the gap caused by differences in patient body shape, providing contact comfort and relieving pressure. In addition, the anti-slip texture on the surface of the flexible buffer layer 401 prevents the patient from slipping during the scanning process. At the same time, its high compression rebound rate ensures that the distance between the RF receiving coil array 4 and the knee joint is kept to a minimum, thereby ensuring that the signal receiving sensitivity is not affected.

[0033] Please see the appendix Figure 2 -Appendix Figure 6 A sleeve 5 is symmetrically fixedly connected to the top of the bed board 1. A piston plate 501 is slidably connected inside the sleeve 5. A piston rod 502 is fixedly connected to the bottom of the piston plate 501. The outer wall of the piston rod 502 is slidably connected to the top of the bed board 1. The bottom of the piston rod 502 is fixedly connected to the top of the connecting plate 301.

[0034] The top of the sleeve 5 is fixedly connected to an inlet pipe 503, and an inlet valve 504 is installed on the outer wall of the inlet pipe 503. The outer wall of the sleeve 5 is fixedly connected to an outlet pipe 505, and an outlet valve 506 is fixedly connected to one end of the outlet pipe 505.

[0035] The other end of the liquid outlet pipe 505 is fixedly connected to the delivery pipe 507. The outer wall of the delivery pipe 507 is fixedly connected to the inner wall of the main support block 2. The outer wall of the delivery pipe 507 is uniformly fixedly connected to the nozzles 508. The outer wall of the nozzles 508 is set in the flexible buffer pad layer 401 of the main support block 2.

[0036] Specifically, when the connecting plate 301 moves downward, it drives the piston rod 502 to move downward synchronously. The piston rod 502 drives the piston plate 501 to slide downward in the sleeve 5. At this time, the inlet valve 504 is opened and the outlet valve 506 is closed. The external disinfectant enters the sleeve 5 for storage through the inlet pipe 503 under negative pressure. After the scan is completed, the patient pulls their leg out of the coil. The main support block 2 loses its gravitational load, and the compressed spring 303 rebounds, causing the connecting plate 301 and the sliding block 3 to move vertically upward along the slide rod 302, eventually returning to their initial position. As the connecting plate 301 moves upward, it also causes the piston rods 502 and piston plates 501 on both sides to move upward synchronously. At this time, the inlet valve 504 automatically closes and the outlet valve 506 automatically opens. The piston plate 501 squeezes the medical disinfectant pre-stored in the sleeve 5 into the outlet pipe 505. The disinfectant is then diverted through the delivery pipe 507 to multiple atomizing nozzles 508 on the inner wall of the main support block 2, and evenly sprayed inside the main support block 2, achieving automatic disinfection of the area where the inner wall of the coil contacts the patient, without the need for manual wiping.

[0037] Please see the appendix Figure 1 -Appendix Figure 2 The main support block 2 and the connecting block 201 both adopt a rigid load-bearing shell, while the extension block 203 adopts a rigid lightweight shell. The main support block 2, the connecting block 201, and the extension block 203 are all made of carbon fiber composite material.

[0038] Specifically, carbon fiber material has advantages such as high specific strength, high specific stiffness, low density and non-magnetic properties, which not only ensures the rigidity and load-bearing capacity of the coil structure, but also avoids the interference of metal materials on the uniformity of the magnetic field. At the same time, the lightweight design reduces the load on the bed board 1, and together with the elastic support components, it achieves the dual guarantee of structural stability and patient comfort.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular adjustable knee joint magnetic resonance coil system, comprising a bed board (1), characterized in that: A main support block (2) and a connecting block (201) are symmetrically arranged above the bed board (1). The top of the connecting block (201) is symmetrically provided with a slot (202). An extension block (203) is provided in each slot (202) of the connecting block (201). The bottom of the connecting block (201) is located in the groove of the extension block (203). A fixing plate (204) is fixedly connected to both sides of the connecting block (201). A threaded rod (205) is rotatably connected to one end of each fixing plate (204). The outer wall of the threaded rod (205) is fixed. A handwheel (2001) is fixedly connected to the top of the threaded rod (205), a locking block (206) is threadedly connected to the top of the threaded rod (205), a guide rod (207) is slidably connected to one end of the locking block (206), the bottom of the guide rod (207) is fixedly connected to the top of the fixed plate (204), a support plate (208) is fixedly connected to both sides of the connecting block (201), a positioning groove (209) is provided inside the support plate (208), an elastic support assembly is installed inside the bed board (1), and a drive assembly is installed at the bottom of the threaded rod (205).

2. The modular adjustable knee joint magnetic resonance coil system according to claim 1, characterized in that: The drive assembly includes two rotating rods (210), the tops of which are fixedly connected to the bottom of the threaded rod (205). One of the rotating rods (210) has a gear one (211) installed on its outer wall. The tooth end of the gear one (211) is meshed with a toothed belt (212). One end of the toothed belt (212) has a gear two (213) meshed with its inner wall. The inner wall of the gear two (213) is fixedly connected to the outer wall of the other rotating rod (210). The outer wall of the toothed belt (212) is provided through the bottom of the main support block (2).

3. The modular adjustable knee joint magnetic resonance coil system according to claim 1, characterized in that: The elastic support assembly includes a sliding block (3), the top of which is fixedly connected to the bottom of the main support block (2). The bed board (1) has an internal receiving groove. The outer wall of the sliding block (3) is slidably connected to the receiving groove. The bottom of the sliding block (3) is fixedly connected to a connecting plate (301). The receiving groove of the bed board (1) is uniformly fixedly connected to a sliding rod (302). The connecting plate (301) has uniformly opened rod holes. The outer wall of the sliding rod (302) is slidably connected to the rod holes. The bottom of the connecting plate (301) is uniformly fixedly connected to a spring (303). The bottom of the spring (303) is fixedly connected to the receiving groove. The inner wall of the spring (303) is sleeved on the outer wall of the sliding rod (302).

4. The modular adjustable knee joint magnetic resonance coil system according to claim 1, characterized in that: The inner walls of the main support block (2), connecting block (201) and extension block (203) are all equipped with radio frequency receiving coil arrays (4). The radio frequency receiving coil arrays (4) are used to receive magnetic resonance signals emitted by the knee joint. The radio frequency receiving coil arrays (4) are distributed in a matrix on the inner walls of the main support block (2), connecting block (201) and extension block (203). The radio frequency receiving coil arrays (4) at the joints of the adjacent extension blocks (203) with the main support block (2) and connecting block (201) generate electrical conduction and decoupling through flexible electrical cables or sliding contact structures. The radio frequency receiving coil arrays (4) include multiple independent resonant circuits for transmitting and receiving or receiving. The resonant circuits are composed of copper wires, distributed capacitance and detuning circuits.

5. The modular adjustable knee joint magnetic resonance coil system according to claim 4, characterized in that: A flexible buffer pad (401) is provided on one side of the radio frequency receiving coil array (4). The outer wall of the flexible buffer pad (401) is fixedly connected to the inner wall of the main support block (2), the connecting block (201) and the expansion block (203). The flexible buffer pad (401) is made of soft medical electrical insulation material.

6. The modular adjustable knee joint magnetic resonance coil system according to claim 4, characterized in that: A transmission signal interface (402) is provided on one side of the main support block (2). The transmission signal interface (402) is electrically connected to the radio frequency receiving coil array (4). The transmission signal interface (402) transmits the received magnetic resonance signal to the magnetic resonance scanning device through a bundled radio frequency coaxial cable.

7. The modular adjustable knee joint magnetic resonance coil system according to claim 1, characterized in that: The top of the bed board (1) is symmetrically fixedly connected with sleeves (5), and piston plates (501) are slidably connected inside the sleeves (5). The bottom of the piston plates (501) is fixedly connected with piston rods (502). The outer wall of the piston rods (502) is slidably connected to the top of the bed board (1), and the bottom of the piston rods (502) is fixedly connected to the top of the connecting plate (301).

8. The modular adjustable knee joint magnetic resonance coil system according to claim 7, characterized in that: The top of the sleeve (5) is fixedly connected to an inlet pipe (503), an inlet valve (504) is installed on the outer wall of the inlet pipe (503), an outlet pipe (505) is fixedly connected to the outer wall of the sleeve (5), and an outlet valve (506) is fixedly connected to one end of the outlet pipe (505).

9. A modular adjustable knee joint magnetic resonance coil system according to claim 8, characterized in that: The other end of the liquid outlet pipe (505) is fixedly connected to a delivery pipe (507). The outer wall of the delivery pipe (507) is fixedly connected to the inner wall of the main support block (2). The outer wall of the delivery pipe (507) is uniformly fixedly connected to a nozzle (508). The outer wall of the nozzle (508) is set in the flexible buffer pad layer (401) of the main support block (2).

10. A modular adjustable knee joint magnetic resonance coil system according to claim 1, characterized in that: The main support block (2) and the connecting block (201) are both made of rigid load-bearing shells, and the extension block (203) is made of rigid lightweight shells. The main support block (2), the connecting block (201) and the extension block (203) are all made of carbon fiber composite material.

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