Adjustable ankle fixator for nuclear magnetism

Abstract

The utility model discloses an adjustable ankle fixator for nuclear magnetism, which comprises a bottom plate, an adjusting device and an ankle fixing device, the adjusting device comprises a first mounting plate, a second mounting plate, a first adjusting component, a mounting frame and a second adjusting component, and the first mounting plate and the second mounting plate are respectively arranged at two ends of the bottom plate in a fixed manner; the first adjusting assembly is movably arranged on the first mounting plate; the mounting frame is movably arranged on the first adjusting assembly; and the second adjusting assembly is movably arranged on the second mounting plate. Therefore, through the design of the adjusting device and the ankle fixing device, the ankle is well fixed and flexibly adjusted, movement of a patient during examination is reduced, the components are made of non-paramagnetic materials, the magnetic field uniformity is prevented from being affected, normal scanning is guaranteed, the image quality is improved, the ankle fixator can be attached to the ankle joint to assist scanning at various angles, and the ankle fixing device is convenient to use. And the device is suitable for different coils and can meet various clinical requirements.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to an adjustable ankle fixator for MRI. Background Technology

[0002] During an MRI scan, maintaining a relatively stable posture within the equipment is crucial for obtaining clear and accurate images. This is a key factor in ensuring the quality of the examination and the accuracy of the diagnosis. This is especially true for areas like the ankle, which are at the extremities of the body and are more susceptible to subtle movements caused by external factors and the patient's own muscle tension and involuntary movements. Even millimeter-level movements can severely impact the final image quality, leading to blurred, distorted, or artifact-prone images. This, in turn, affects the doctor's observation and judgment of lesions or structures, delaying diagnosis and treatment.

[0003] While existing ankle immobilization devices are diverse, they have several shortcomings in practical use. Firstly, some traditional devices are ineffective in maintaining stability. They may rely solely on simple straps or clips, which, during prolonged examinations, can become unstable due to slight patient movements or vibrations from the equipment, failing to keep the ankle consistently and effectively stationary throughout the procedure. Secondly, patients exhibit significant differences in ankle size and angle, and existing devices often lack flexible adjustment mechanisms. They cannot precisely adjust to individual patient characteristics, either failing to fit snugly and resulting in insecure fixation, or causing excessive pressure on the patient, affecting comfort and cooperation during the examination. More importantly, due to design or material limitations, some existing ankle immobilization devices may contain paramagnetic materials. These materials can generate additional magnetic fields in the magnetic field environment, disrupting the uniform magnetic field required for MRI scans. When the uniformity of the magnetic field is affected, it can lead to uneven distribution of MRI signals, resulting in severe image artifacts. This greatly interferes with the MRI scan results, affecting not only the doctor's judgment of the lesion but also potentially leading to the risk of misdiagnosis or missed diagnosis. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this invention is to propose an adjustable ankle fixator for MRI. Through the design of the adjustment device and the ankle fixation device, good fixation and flexible adjustment of the ankle are achieved, reducing patient movement during the examination and ensuring accurate results. The components are made of non-paramagnetic materials to avoid affecting the uniformity of the magnetic field, ensuring normal scanning and improving image quality. This ankle fixator can conform to the ankle joint to assist scanning at various angles, is suitable for different coils, and can meet a variety of clinical needs.

[0006] To achieve the above objectives, this utility model proposes an adjustable ankle fixator for nuclear magnetic resonance imaging (NMR), comprising a base plate, an adjustment device, and an ankle fixation device. The adjustment device includes a first mounting plate, a second mounting plate, a first adjustment component, a mounting frame, and a second adjustment component. The first and second mounting plates are fixedly disposed at opposite ends of the base plate. The first adjustment component is movably disposed on the first mounting plate for adjusting the position of the mounting frame. The mounting frame is movably disposed on the first adjustment component. The second adjustment component is movably disposed on the second mounting plate, and one end of the second adjustment component is connected to the side wall of the mounting frame via a movable connection structure to achieve coordinated adjustment of the mounting frame. The ankle fixation device includes a fixation component, which is fixedly disposed on the mounting frame for fixing the ankle.

[0007] This invention relates to an adjustable ankle fixator for MRI, which, through the design of an adjustment device and an ankle fixation device, achieves good fixation and flexible adjustment of the ankle, reduces patient movement during examination, ensures accurate results, and the components are made of non-paramagnetic materials to avoid affecting the uniformity of the magnetic field, ensuring normal scanning and improving image quality. This ankle fixator can conform to the ankle joint to assist scanning at various angles, is suitable for different coils, and can meet a variety of clinical needs.

[0008] In addition, the adjustable ankle immobilizer for MRI proposed in the above application may also have the following additional technical features:

[0009] Specifically, the first adjustment assembly includes a first rack seat, a first connecting shaft, a first rotating gear, a first spring, a first bearing block, a movable plate, and a mounting sleeve. The first rack seat is fixedly disposed on one side of the base plate. The first connecting shaft is slidably disposed on the first mounting plate and can slide along a preset channel. One end of the first rotating gear is fixedly connected to one end of the first connecting shaft via a fixed connection structure, and the first rotating gear and the first rack seat engage via tooth grooves to achieve transmission and adjustment functions. One end of the first spring is fixedly connected to the side wall of the first mounting plate, and the other end is connected to the side wall of the first rotating gear via a bushing. The first bearing block is disposed at the other end of the first mounting plate, and one end of the first connecting shaft is slidably disposed on the first bearing block and can slide axially within the first bearing block. One end of the movable plate is fixedly connected to the first bearing block. The mounting sleeve is rotatably connected to the movable plate, and the mounting bracket is disposed within the mounting sleeve.

[0010] Specifically, the second adjustment assembly includes a second rack seat, a second connecting shaft, a second rotating gear, a second spring, a second bearing block, and a connecting sleeve rod. The second rack seat is fixedly mounted on the other side of the base plate. The second connecting shaft is slidably mounted on the second mounting plate and can slide along a preset channel. One end of the second rotating gear is fixedly connected to one end of the second connecting shaft, and the second rotating gear and the second rack seat engage through tooth grooves to achieve transmission and adjustment functions. One end of the second spring is fixedly connected to the side wall of the second mounting plate, and the other end is connected to the side wall of the second rotating gear through a bushing. The second bearing block is fixedly mounted on the other end of the second mounting plate, and one end of the second connecting shaft is slidably mounted on the second bearing block and can slide axially within the second bearing block. One end of the connecting sleeve rod is fixedly connected to the second bearing block, and the other end is connected to the mounting sleeve through a detachable pin to achieve a coordinated adjustment function for the mounting frame.

[0011] Specifically, the fixing component includes a leg support, a sliding footboard, and three sets of restraint straps. The leg support is fixedly mounted on the mounting frame to support the legs. The sliding footboard is slidably mounted at the other end of the leg support and can slide along a preset sliding track to support the feet. The three sets of restraint straps are respectively adhered to the leg support and the sliding footboard through an adhesive structure to secure the ankle and surrounding areas.

[0012] Specifically, all components of the adjustable ankle stabilizer for MRI are made of non-paramagnetic materials, specifically plastic, to ensure that the uniformity of the magnetic field is not affected during MRI scanning.

[0013] The advantages of this invention compared to existing technologies are as follows:

[0014] (1) By setting the first adjustment component and the second adjustment component, the mounting frame can be adjusted in multiple dimensions. The position and angle of the fixator can be flexibly adjusted according to the ankle size and angle requirements of different patients, which improves applicability and comfort.

[0015] (2) By using the combination of leg support, sliding footboard and three sets of restraint straps, the ankle and its surrounding parts can be firmly fixed, reducing the patient's movement during the MRI examination and ensuring the accuracy of the examination results.

[0016] (3) All components are made of non-paramagnetic materials, preferably plastic, which avoids the influence on the uniformity of the magnetic field, ensures the normal operation of nuclear magnetic resonance scanning, and improves the quality of the scanned images.

[0017] (4) The ankle fixator can fit the ankle joint for scanning, assist the ankle joint in scanning at various angles, and is suitable for different coils, with wide applicability to meet different clinical needs.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a perspective view of an adjustable ankle fixator for MRI, according to one embodiment of the present invention.

[0021] Figure 2 This is a perspective view of an adjustable ankle fixator for MRI, according to one embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of an adjustable ankle fixator for nuclear magnetic resonance imaging according to one embodiment of the present invention;

[0023] Figure 4 This is a side view of an adjustable ankle fixator for MRI according to one embodiment of the present invention;

[0024] Figure 5 This is a side view of an adjustable ankle fixator for MRI, according to another embodiment of the present invention.

[0025] As shown in the figure: 1. Base plate; 2. Adjustment device; 3. Ankle fixing device; 21. First mounting plate; 22. Second mounting plate; 23. First adjustment component; 24. Mounting frame; 25. Second adjustment component; 31. Fixing component; 231. First rack seat; 232. First connecting shaft; 233. First rotating gear; 234. First spring; 235. First bearing block; 236. Movable plate; 237. Mounting sleeve; 251. Second rack seat; 252. Second connecting shaft; 253. Second rotating gear; 254. Second spring; 255. Second bearing block; 256. Connecting sleeve rod; 311. Leg support; 312. Sliding footboard; 313. Restraint strap. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0027] The following description, in conjunction with the accompanying drawings, describes an adjustable ankle fixator for nuclear magnetic resonance imaging (NMR) according to an embodiment of the present invention.

[0028] like Figures 1-5 As shown in the figure, an adjustable ankle fixator for nuclear magnetic resonance imaging (NMR) according to an embodiment of the present invention includes a base plate 1, an adjustment device 2, and an ankle fixation device 3. The adjustment device 2 includes a first mounting plate 21, a second mounting plate 22, a first adjustment component 23, a mounting frame 24, and a second adjustment component 25. The first mounting plate 21 and the second mounting plate 22 are respectively fixedly disposed at both ends of the base plate 1. The first adjustment component 23 is movably disposed on the first mounting plate 21 for adjusting the position of the mounting frame 24. The mounting frame 24 is movably disposed on the first adjustment component 23. The second adjustment component 25 is movably disposed on the second mounting plate 22, and one end of the second adjustment component 25 is connected to the side wall of the mounting frame 24 through a movable connection structure to achieve coordinated adjustment of the mounting frame 24. The ankle fixation device 3 includes a fixing component 31, which is fixedly disposed on the mounting frame 24 for fixing the ankle.

[0029] It is understandable that the base plate 1 serves as the supporting foundation for the entire fixture. The base plate 1 is made of sturdy and durable materials to ensure stability during use.

[0030] The first mounting plate 21 and the second mounting plate 22 are respectively fixed at both ends of the base plate 1, serving as the mounting base for the adjustment components.

[0031] The first adjustment component 23 is mounted on the first mounting plate 21 via gear transmission, allowing it to move in a certain direction (such as the front-to-back direction) for preliminary adjustment of the position of the mounting bracket 24.

[0032] The mounting bracket 24 serves as a support platform for the ankle fixation device 3. The mounting bracket 24 is movably mounted on the first adjustment component 23, meaning that it can move according to the adjustment of the first adjustment component 23. At the same time, the mounting bracket 24 itself may also be designed to have a certain degree of mobility (such as tilting up and down) to adapt to the fixation requirements at different angles.

[0033] The second adjustment component 25 is mounted on the second mounting plate 22 via gear transmission, and one end of it is connected to the side wall of the mounting bracket 24 via a universal joint connection structure. In this way, when the first adjustment component 23 adjusts the position of the mounting bracket 24, the second adjustment component 25 can work in coordination to ensure the smooth movement and positioning of the mounting bracket 24.

[0034] The fixation component 31 is fixedly mounted on the mounting bracket 24 and includes adjustable straps for securely and comfortably securing the ankle to prevent movement during MRI examinations.

[0035] Workflow description:

[0036] In practical use, firstly, based on the patient's ankle size and the specific requirements of the MRI examination, the first adjustment component 23 is used to make preliminary adjustments along the first mounting plate 21 in the front-back direction, so that the mounting frame 24 reaches a roughly suitable position. Next, utilizing the mobility of the second adjustment component 25, through its movable connection structure with the side wall of the mounting frame 24, fine adjustments are made to ensure that the mounting frame 24 is not only correctly positioned, but also at an angle that conforms to the optimal state for ankle fixation.

[0037] The patient's ankle is then placed on the fixation component 31, and the ankle is securely and comfortably fixed by adjusting the straps within the fixation component 31. Throughout the adjustment and fixation process, the flexibility and collaborative working ability of the adjustment device 2 ensures that the ankle fixator can adapt to different patients' ankle sizes and fixation needs, providing stable and reliable support for MRI examinations.

[0038] In one embodiment of this utility model, such as Figures 1-5As shown, the first adjusting assembly 23 includes a first rack seat 231, a first connecting shaft 232, a first rotating gear 233, a first spring 234, a first bearing block 235, a movable plate 236, and a mounting sleeve 237. The first rack seat 231 is fixedly mounted on one side of the base plate 1. The first connecting shaft 232 is slidably mounted on the first mounting plate 21 and can slide along a preset channel. One end of the first rotating gear 233 is fixedly connected to one end of the first connecting shaft 232 via a fixed connection structure, and the first rotating gear 233 and the first rack seat 231 are connected by a fixed connection structure. The gear teeth engage to achieve transmission and adjustment functions. One end of the first spring 234 is fixedly connected to the side wall of the first mounting plate 21, and the other end is connected to the side wall of the first rotating gear 233 through a bushing. The first bearing block 235 is disposed at the other end of the first mounting plate 21. One end of the first connecting shaft 232 is slidably disposed on the first bearing block 235 and can slide axially within the first bearing block 235. One end of the movable plate 236 is fixedly connected to the first bearing block 235. The mounting sleeve 237 is rotatably connected to the movable plate 236. The mounting bracket 24 is disposed within the mounting sleeve 237.

[0039] It can be understood that the first rack seat 231 serves as the basis for transmission. The first rack seat 231 is firmly installed on one side of the base plate 1 and has regular tooth grooves on it for engaging with the first rotating gear 233 for transmission.

[0040] The first connecting shaft 232 is designed to be slidable and is installed in a pre-defined channel on the first mounting plate 21. This channel ensures that the first connecting shaft 232 can only slide in a specific direction (such as the front-back direction) and cannot deviate from this path.

[0041] One end of the first rotating gear 233 is connected to one end of the first connecting shaft 232 via a fixed connection structure to ensure that the two rotate synchronously. The teeth of the first rotating gear 233 match the tooth grooves of the first rack seat 231. When the two are engaged, rotating the first rotating gear 233 can drive the first connecting shaft 232 to move along the rack direction.

[0042] The first spring 234 provides a restoring force. One end of the spring is fixed to the side wall of the first mounting plate 21, and the other end is connected to the side wall of the first rotating gear 233 via a bushing. When the position needs to be adjusted, the first rotating gear 233 is pressed inward to compress the first spring 234, thereby disengaging the first rotating gear 233 from the first rack seat 231 and facilitating rotation.

[0043] The first bearing block 235 is disposed at the other end of the first mounting plate 21 to support the other end of the first connecting shaft 232 and allow it to slide smoothly along the axial direction within the bearing block, ensuring smoothness and stability of the sliding.

[0044] One end of the movable plate 236 is fixedly connected to the first bearing block 235, serving as the supporting base for the mounting sleeve 237.

[0045] Mounting sleeve 237 is rotatably connected to movable plate 236 and is internally used for mounting and supporting mounting bracket 24. The design of mounting sleeve 237 allows the mounting bracket 24 to be adjusted in angle within a certain range to accommodate different patients' ankle shapes.

[0046] Workflow description:

[0047] When adjusting the position using the first adjusting component 23, the user first presses the first rotating gear 233 inward to compress the first spring 234, thereby disengaging the first rotating gear 233 from the tooth groove of the first rack seat 231. At this time, the user can freely rotate the first rotating gear 233. Since the first rotating gear 233 is fixedly connected to the first connecting shaft 232, the rotation will cause the first connecting shaft 232 to slide within the channel of the first mounting plate 21, thereby changing the position of the mounting bracket 24.

[0048] Once the position is adjusted to the appropriate level, the user releases the first rotating gear 233. Under the elastic restoring force of the first spring 234, the first rotating gear 233 automatically resets and re-engages with the tooth groove of the first rack seat 231, thereby fixing the adjusted position.

[0049] Since the mounting sleeve 237 is rotatably connected to the movable plate 236, the user can further adjust the angle of the mounting bracket 24 after fixing the position to adapt to the specific shape of the ankle.

[0050] In one embodiment of this utility model, such as Figures 1-5As shown, the second adjusting assembly 25 includes a second rack seat 251, a second connecting shaft 252, a second rotating gear 253, a second spring 254, a second bearing block 255, and a connecting sleeve rod 256. The second rack seat 251 is fixedly mounted on the other side of the base plate 1. The second connecting shaft 252 is slidably mounted on the second mounting plate 22 and can slide along a preset channel. One end of the second rotating gear 253 is fixedly connected to one end of the second connecting shaft 252, and the second rotating gear 253 and the second rack seat 251 engage through tooth grooves to achieve transmission and... The adjustment function is achieved by fixing one end of the second spring 254 to the side wall of the second mounting plate 22 and the other end to the side wall of the second rotating gear 253 through a bushing. The second bearing block 255 is fixedly disposed at the other end of the second mounting plate 22. One end of the second connecting shaft 252 is slidably disposed on the second bearing block 255 and can slide axially within the second bearing block 255. One end of the connecting sleeve rod 256 is fixedly connected to the second bearing block 255 and the other end is connected to the mounting sleeve 237 through a detachable pin, so as to realize the coordinated adjustment function of the mounting bracket 24.

[0051] As can be understood, the second rack seat 251 is similar to the first rack seat 231, and is also firmly mounted on the other side of the base plate 1. It has regular toothed grooves for engaging with the second rotating gear 253. This design ensures that the second adjustment component 25 can operate independently of the first adjustment component 23, providing multi-dimensional adjustment capabilities for the ankle fixator.

[0052] The second connecting shaft 252 is designed to slide and is installed in a pre-set channel on the second mounting plate 22. This channel ensures that the second connecting shaft 252 can slide smoothly in a specific direction, providing stable support for the transmission of the second rotating gear 253.

[0053] One end of the second rotating gear 253 is connected to one end of the second connecting shaft 252 via a fixed connection structure to ensure that the two rotate synchronously. The teeth of the second rotating gear 253 match the tooth grooves of the second rack seat 251. When the two are engaged, rotating the second rotating gear 253 can drive the second connecting shaft 252 to move along the rack direction, thereby realizing another dimension of adjustment of the mounting bracket 24.

[0054] Similar to the first spring 234, the second spring 254 also provides a restoring force. One end is fixed to the side wall of the second mounting plate 22, and the other end is connected to the side wall of the second rotating gear 253 via a bushing. When position adjustment is required, pressing the second rotating gear 253 inward compresses the second spring 254, disengaging the second rotating gear 253 from the tooth groove of the second rack seat 251, facilitating rotation.

[0055] The second bearing block 255 is fixedly mounted at the other end of the second mounting plate 22 to support the other end of the second connecting shaft 252 and allow it to slide smoothly axially within the bearing block. This design ensures the stability and smoothness of the second connecting shaft 252 during sliding.

[0056] The connecting sleeve 256 serves as the connector between the second adjusting assembly 25 and the mounting sleeve 237. One end of the connecting sleeve 256 is fixedly connected to the second bearing block 255, while the other end is connected to the mounting sleeve 237 via a detachable pin. This connection method not only ensures the coordinated operation between the second adjusting assembly 25 and the first adjusting assembly 23, but also allows users to easily disassemble and reassemble the components as needed.

[0057] Workflow description:

[0058] When adjusting the position using the second adjustment component 25, the user first presses the second rotating gear 253 inward to compress the second spring 254, thereby disengaging the second rotating gear 253 from the tooth groove of the second rack seat 251. At this time, the user can freely rotate the second rotating gear 253. Since the second rotating gear 253 is fixedly connected to the second connecting shaft 252, the rotation will cause the second connecting shaft 252 to slide within the channel of the second mounting plate 22, thereby changing the position of the mounting bracket 24 in another dimension.

[0059] Once the position is adjusted to the appropriate level, the user releases the second rotating gear 253. Under the elastic restoring force of the second spring 254, the second rotating gear 253 automatically resets and re-engages with the tooth groove of the second rack seat 251, thereby fixing the adjusted position.

[0060] Since one end of the connecting sleeve 256 is fixedly connected to the second bearing block 255, and the other end is connected to the mounting sleeve 237 via a detachable pin, the adjustment of the second adjustment component 25 directly affects the overall position of the mounting sleeve 237 and the mounting bracket 24. This design allows users to precisely adjust the mounting bracket 24 in multiple dimensions by simultaneously operating the first adjustment component 23 and the second adjustment component 25, thereby meeting the ankle fixation needs of different patients.

[0061] In one embodiment of this utility model, such as Figures 1-5As shown, the fixing component 31 includes a leg support 311, a sliding footboard 312, and three sets of restraint straps 313. The leg support 311 is fixedly mounted on the mounting frame 24 to support the legs. The sliding footboard 312 is slidably mounted on the other end of the leg support 311 and can slide along a preset sliding track to support the feet. The three sets of restraint straps 313 are respectively bonded to the leg support 311 and the sliding footboard 312 through an adhesive structure to fasten and fix the ankle and its surrounding parts.

[0062] As can be understood, the leg support 311 serves as the main support structure of the fixing component 31, and is fixedly mounted on the mounting bracket 24. This design ensures the stability and load-bearing capacity of the leg support 311, enabling it to firmly support the patient's legs. The shape and size of the leg support 311 are carefully designed to conform to ergonomic principles, providing a comfortable support experience.

[0063] To accommodate different foot sizes and positional needs of patients, the sliding footboard 312 is designed to slide and is installed at the other end of the leg rest 311. The sliding footboard 312 slides along a preset sliding track, thereby adjusting the foot support position according to the patient's actual situation.

[0064] To securely fasten and stabilize the ankle and surrounding areas, the fixation assembly 31 is equipped with three sets of restraint straps 313. These restraint straps 313 are attached to the leg support 311 and the sliding footplate 312 via Velcro fasteners. The restraint straps 313 are made of a soft and elastic material, providing a comfortable wearing experience while ensuring a secure fit. Furthermore, the design of the three sets of restraint straps 313 allows users to target different areas as needed, improving the flexibility and reliability of the fixation.

[0065] Workflow description:

[0066] When using the fixation component 31 to immobilize the ankle, the patient first places their leg on the leg support 311 to ensure stable support. Next, the position of the sliding footplate 312 is adjusted according to the patient's foot size and positional needs to comfortably support the patient's foot.

[0067] Once the legs and feet are properly supported, the three sets of restraint straps 313 can be used to secure and stabilize the ankle and surrounding area. Users can wrap the restraint straps 313 around the patient's legs and feet as needed and attach them to the leg rest 311 and the sliding footplate 312 via adhesive structures. During the fixation process, users should adjust the tightness of the restraint straps 313 to ensure a secure ankle fixation without causing discomfort to the patient.

[0068] It is worth noting that because the number and position of the restraint straps 313 are adjustable, users can personalize the fixation settings according to the patient's specific situation. This design not only improves the flexibility and reliability of fixation but also ensures that the patient can maintain a comfortable posture during MRI examinations.

[0069] In one embodiment of this utility model, such as Figures 1-5 As shown, all components of the adjustable ankle stabilizer for MRI are made of non-paramagnetic materials, specifically plastic, to ensure that the uniformity of the magnetic field is not affected during MRI scans.

[0070] It is understandable that magnetic field homogeneity is a crucial factor in nuclear magnetic resonance (NMR) scanning. If the object in the scanning area contains paramagnetic materials (such as iron, nickel, or other metallic elements), these materials will be subjected to forces in the magnetic field, affecting the magnetic field homogeneity and potentially interfering with the accuracy of the scan results.

[0071] To avoid this situation, the ankle fixation device of this utility model uses a non-paramagnetic material. Specifically, all components, including but not limited to the mounting bracket 24, leg support 311, sliding foot plate 312, restraint strap 313, and various parts of the first adjustment component 23 and the second adjustment component 25 (such as the first rack seat 231, the second rack seat 251, the connecting shaft, the rotating gear, the spring, the bearing block, etc.), are made of a non-paramagnetic rigid plastic material.

[0072] Specifically, in actual implementation, firstly, the ankle fixator is placed in a suitable position on the MRI examination table to ensure that the base plate 1 is placed stably, providing a solid support foundation for the entire device.

[0073] Next, based on the approximate position and size of the patient's ankle, the position of the mounting bracket 24 is adjusted. The operator first operates the first adjustment component 23, pressing the first rotating gear 233 inward to compress the first spring 234, disengaging the first rotating gear 233 from the tooth groove of the first rack seat 231. Then, the first rotating gear 233 is rotated. Since the first rotating gear 233 is fixedly connected to the first connecting shaft 232, the first connecting shaft 232 slides within the channel of the first mounting plate 21, thereby moving the mounting bracket 24, installed in the mounting sleeve 237, in the corresponding direction, achieving the initial adjustment of the mounting bracket 24's position. After adjustment, the first rotating gear 233 is released. Under the elastic restoring force of the first spring 234, the first rotating gear 233 re-engages with the tooth groove of the first rack seat 231, fixing the mounting bracket 24 in its current position.

[0074] Subsequently, the second adjustment component 25 is operated to further precisely adjust the position and angle of the mounting bracket 24. Similarly, pressing the second rotating gear 253 inward compresses the second spring 254, disengaging the second rotating gear 253 from the tooth groove of the second rack seat 251. Rotating the second rotating gear 253 causes the second connecting shaft 252 to slide within the channel of the second mounting plate 22. Since one end of the connecting sleeve 256 is fixedly connected to the second bearing block 255, and the other end is connected to the mounting sleeve 237 via a detachable pin, the sliding of the second connecting shaft 252 affects the position and angle of the mounting sleeve 237 and the mounting bracket 24 through the connecting sleeve 256, achieving coordinated adjustment of the mounting bracket 24 and ensuring it is in the optimal ankle-fixing position. After adjustment, the second rotating gear 253 is released, and the second spring 254 resets the second rotating gear 253 and re-engages it with the second rack seat 251, fixing the adjusted state.

[0075] After the mounting frame 24 is adjusted, guide the patient to place their legs on the leg rest 311. The leg rest 311 is fixed to the mounting frame 24, providing stable support for the patient's legs. Depending on the size and position of the patient's feet, slide the sliding footboard 312. The sliding footboard 312 moves on the preset sliding track of the leg rest 311 and is adjusted to a suitable position to comfortably support the patient's feet.

[0076] Finally, three sets of restraint straps 313 are used to secure and fix the patient's ankle and surrounding area. The restraint straps 313 are wrapped around the patient's leg and foot respectively, and using their adhesive structure, they are attached to the leg support 311 and the sliding footplate 312. The tightness of the restraint straps 313 is adjusted to ensure that the ankle is securely fixed without causing discomfort to the patient.

[0077] This completes the fixation of the patient's ankle using the adjustable ankle fixator for MRI, ensuring the ankle remains stable during the MRI examination. Furthermore, since all components of the fixator are made of non-paramagnetic materials, it does not affect the uniformity of the magnetic field in the MRI scan, thus guaranteeing the accuracy of the examination results.

[0078] In summary, the adjustable ankle fixator for MRI provided by this utility model achieves good fixation and flexible adjustment of the ankle through the design of the adjustment device and the ankle fixation device, reducing patient movement during examination, ensuring accurate results, and the components are made of non-paramagnetic materials to avoid affecting the uniformity of the magnetic field, ensuring normal scanning and improving image quality. This ankle fixator can conform to the ankle joint to assist scanning at various angles, is suitable for different coils, and can meet a variety of clinical needs.

[0079] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An adjustable ankle immobilizer for use with nuclear magnetic resonance, characterized by, The device comprises a bottom plate (1), an adjusting device (2) and an ankle fixing device (3), wherein, the adjusting device (2) comprises a first mounting plate (21), a second mounting plate (22), a first adjusting assembly (23), a mounting frame (24) and a second adjusting assembly (25), wherein, the first mounting plate (21) and the second mounting plate (22) are respectively arranged at the two ends of the bottom plate (1) in a fixed manner; the first adjusting assembly (23) is arranged on the first mounting plate (21) in a movable manner, and is used for adjusting the position of the mounting frame (24); the mounting frame (24) is movably arranged on the first adjusting assembly (23); the second adjusting assembly (25) is movably arranged on the second mounting plate (22), and one end of the second adjusting assembly (25) is connected with the side wall of the mounting frame (24) through a movable connection structure, so as to realize the cooperative adjustment of the mounting frame (24); the ankle fixing device (3) comprises a fixing assembly (31), wherein, the fixing assembly (31) is arranged on the mounting frame (24) in a fixed manner, and is used for fixing the ankle.

2. The adjustable ankle immobilizer for nuclear magnetic use according to claim 1, wherein the first adjusting assembly (23) comprises a first rack seat (231), a first connecting shaft (232), a first rotating gear (233), a first spring (234), a first bearing block (235), a movable plate (236) and a mounting sleeve (237), wherein, the first rack seat (231) is arranged on one side of the bottom plate (1) in a fixed manner; the first connecting shaft (232) is slidably arranged on the first mounting plate (21), and can slide along a preset channel; one end of the first rotating gear (233) is fixedly connected with one end of the first connecting shaft (232) through a fixed connection structure, and the first rotating gear (233) is clamped with the first rack seat (231) through a gear slot, so as to realize the transmission and adjustment functions; one end of the first spring (234) is fixedly connected with the side wall of the first mounting plate (21), and the other end is connected with the side wall of the first rotating gear (233) through a shaft sleeve; the first bearing block (235) is arranged at the other end of the first mounting plate (21), and one end of the first connecting shaft (232) is slidably arranged on the first bearing block (235) and can slide in the axial direction in the first bearing block (235); one end of the movable plate (236) is fixedly connected with the first bearing block (235); the mounting sleeve (237) is rotatably connected with the movable plate (236), and the mounting frame (24) is arranged in the mounting sleeve (237).

3. The adjustable ankle immobilizer for nuclear magnetic use according to claim 2, wherein the second adjusting assembly (25) comprises a second rack seat (251), a second connecting shaft (252), a second rotating gear (253), a second spring (254), a second bearing block (255) and a connecting sleeve rod (256), wherein, the second rack seat (251) is arranged on the other side of the bottom plate (1) in a fixed manner; The second connecting shaft (252) is slidably arranged on the second mounting plate (22) and can slide along a preset channel; One end of the second rotating gear (253) is fixedly connected with one end of the second connecting shaft (252), and the second rotating gear (253) is clamped with the second rack seat (251) through a gear slot to realize transmission and adjustment functions; One end of the second spring (254) is fixedly connected with the side wall of the second mounting plate (22), and the other end is connected with the side wall of the second rotating gear (253) through a shaft sleeve; The second bearing block (255) is fixedly arranged at the other end of the second mounting plate (22), one end of the second connecting shaft (252) is slidably arranged on the second bearing block (255) and can slide axially in the second bearing block (255); One end of the connecting sleeve rod (256) is fixedly connected with the second bearing block (255), and the other end is connected with the mounting sleeve (237) through a detachable pin to realize the cooperative adjustment function of the mounting frame (24).

4. The adjustable ankle immobilizer for nuclear magnetic use according to claim 1, wherein The fixing assembly (31) comprises a leg support (311), a slidable foot plate (312) and three groups of binding belts (313), wherein, The leg support (311) is fixedly arranged on the mounting frame (24) and used for supporting the leg; The slidable foot plate (312) is slidably arranged at the other end of the leg support (311) and can slide along a preset sliding track, and is used for supporting the foot; The three groups of binding belts (313) are respectively adhered on the leg support (311) and the slidable foot plate (312) through an adhering structure, and are used for fastening and fixing the ankle and the surrounding parts.

5. The adjustable ankle immobilizer for use in MRI according to any one of claims 1-4, wherein, All components of the adjustable ankle fixator for nuclear magnetic resonance are made of non-paramagnetic materials, specifically plastic materials, to ensure that the uniformity of the magnetic field is not affected during the nuclear magnetic resonance scanning process.

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