Human body detection part shape self-adaptive fixing device for nuclear magnetic resonance spectrometer

Abstract

The invention discloses a human body detection part appearance self-adaption fixing device for a nuclear magnetic resonance spectrometer, and relates to the field of medical instruments, the human body detection part appearance self-adaption fixing device comprises a flexible fixing cuff, cuff hook-and-loop fasteners, a rubber connecting pipe and a control host, the flexible fixing cuff is a core fixing part of the device, and the cuff hook-and-loop fasteners are arranged on the flexible fixing cuff. A plurality of inverse pneumatic artificial muscle natural latex rubber tubes are uniformly arranged at the inner cavity of the flexible fixed cuff at equal intervals, and are sleeved with inverse pneumatic artificial muscle constraint fibers; and a piezoelectric ceramic sensor is embedded between the lower-layer fabric of the flexible fixed cuff and the lower layer of the inflatable plastic plate. According to the invention, an independent inflatable IPAM array structure is adopted, a piezoelectric ceramic pressure feedback mechanism is combined, and the inflation state of each module is accurately controlled, so that flexible fitting and dynamic adaptation of human body detection parts with different sizes are realized; the problems of limb compression, unstable fixation, secondary injury and the like caused by'one-cutting 'type constraint in a traditional fixing mode are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a shape-adaptive fixing device for a human body detection part used in a nuclear magnetic resonance apparatus. Background Art

[0002] The device uses flexible materials and modular structural design, based on inverse pneumatic artificial muscle (IPAM) and pressure feedback control technology, to achieve dynamic adaptive fitting and flexible fixed constraints on the patient's body detection parts. Its core application scenario is magnetic resonance imaging (MRI) examination. It is particularly suitable for scenarios that require precise body position fixation, such as clinical diagnosis, functional imaging and interventional treatment. By solving the problem of image quality degradation caused by shaking of the detection part in traditional fixation methods, it can significantly improve the image clarity and diagnostic accuracy of MRI examinations, while reducing medical costs and patient discomfort caused by repeated scanning.

[0003] As an important medical imaging diagnostic technology, MRI has significant advantages such as no ionizing radiation and high soft tissue resolution. It has been widely used in various clinical examinations such as the nervous system, bone and joint, and soft tissue lesions. However, to ensure imaging quality, MRI examinations place high demands on the stability of the patient's position. Especially when scanning small target areas such as limbs and hands, the patient's specific position (such as supine position) must be strictly maintained, and the affected limb must be supported to a position consistent with the torso to ensure that the imaging area is in a uniform area of the magnetic field, thereby obtaining clear and accurate images. However, in current clinical practice, there is a general lack of standardized postural support and fixation assistive devices. Medical staff usually rely on temporary combinations of soft pads for support. Such pads lack uniform standards in height, angle and shape, and are very likely to cause the position of the affected limb to shift or the support angle to be improper during use, thereby affecting the positioning accuracy of the imaging area. In addition, since the soft pad support method is difficult to effectively constrain the patient's examination part, even slight postural movement of the patient during the examination may cause limb displacement, thereby causing imaging quality problems such as image blur and artifacts. This will not only cause poor image quality, increase the probability of repeated scanning, and prolong the examination time, but also aggravate the patient's anxiety and even bring other potential risks.

[0004] At present, the commonly used clinical methods of test site fixation mainly include physical compression fixation and rigid structure support. Among them, physical compression fixation is represented by sandbag pressurization. Although it is easy to operate, in actual application, because the sandbag is directly applied to the surface of the affected limb through weight, it is very easy to cause secondary pain and discomfort for patients with postoperative pain, inflammation or fractures, increase the risk of involuntary movement of patients, and may even cause secondary injury. At the same time, the sandbag has a fixed shape and it is difficult to fit tightly to the complex curved surface of the test site, resulting in uneven pressure distribution, which not only reduces the comfort during fixation, but also weakens the reliability of its fixation effect. The rigid structure support method is represented by hard brackets or strap devices. Although such devices can achieve a certain degree of stable support, their standardized structural design makes it difficult to adapt to individual differences in patients. Specifically, in clinical practice, the thickness of the patient's test site, the size of the surgical site, and the size of the surgical site are different. The degree of swelling after surgery varies, and such devices cannot be flexibly adjusted. Fillers such as gauze and sponges are often needed to fill the gaps. This operation is not only cumbersome, but also has an unstable filling effect. Once the filling is uneven, it may cause excessive local compression, further aggravating the patient's discomfort. In addition, the MRI examination environment has strict electromagnetic compatibility requirements for the materials used in the equipment. It is necessary to ensure that the materials used are non-magnetic and non-conductive to avoid interference with magnetic fields and radio frequency signals. However, some existing fixing devices contain metal fasteners, electromagnetic components or electronic sensors, which are very likely to cause magnetic field distortion or radio frequency interference. Such interference may cause image artifacts at the least, affecting the accuracy of diagnosis, and may even affect the safety of equipment operation, greatly limiting its applicability in the MRI environment. Therefore, there is an urgent need to develop an MRI-specific human body detection part support and fixation device with a reasonable structure, stable fixation, strong adaptability and support for personalized adjustment.

[0005] Therefore, it is necessary to invent a body detection part shape adaptive fixing device for a nuclear magnetic resonance apparatus to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a body detection part shape adaptive fixing device for a nuclear magnetic resonance apparatus, so as to solve the problems of poor individual adaptability, insufficient comfort and low fixing accuracy existing in the existing body detection part fixing devices in MRI examinations.

[0007] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a device for adaptively fixing the shape of a human body detection part for a nuclear magnetic resonance apparatus, comprising a flexible fixing cuff, a cuff Velcro, a rubber connecting tube and a control host, wherein the flexible fixing cuff is the core fixing component of the device, and a cuff Velcro is provided on the outside thereof. The flexible fixing cuff is connected to the air pump and the air release valve of the control host through the rubber connecting tube to form a closed-loop air path system, the flexible fixing cuff is provided with a nuclear magnetic coil on the outside, a hard plastic plate is provided on the upper part of the flexible fixing cuff, and an inflatable plastic plate is provided on the lower part of the flexible fixing cuff, a plurality of inverse pneumatic artificial muscle natural latex rubber tubes are equidistantly arranged in the internal cavity of the flexible fixing cuff, a plurality of inverse pneumatic artificial muscle natural latex rubber tubes are provided with inverse pneumatic artificial muscle constraint fibers, and a piezoelectric ceramic sensor is embedded between the lower fabric of the flexible fixing cuff and the lower layer of the inflatable plastic plate.

[0008] Furthermore, the control host is integrated with a high-precision air pump, an electromagnetic air release valve and a human-computer interaction panel. The air pump is driven by a brushless motor, and the electromagnetic air release valve has the ability to quickly exhaust air. The control host and the flexible fixed cuff are connected by a quick-plug gas-electric interface. The brushless motor-driven air pump has low noise and high response characteristics, and the electromagnetic air release valve is used to quickly release the gas in the flexible fixed cuff after the inspection is completed to achieve fixation release, and the quick-plug gas-electric interface connection is used to facilitate assembly and maintenance.

[0009] Furthermore, the rubber connecting tube penetrates into the interior of the flexible fixed cuff and is connected to the gap layer of the inflatable plastic plate to convey the airflow output by the air pump.

[0010] Furthermore, the outer layer of the flexible fixed cuff is a skin-friendly fabric outer layer of the cuff, which is made of medical silicone fiber and is used to cover the entire internal structure of the flexible fixed cuff. It has good air permeability and skin-fitting properties, improves the patient's wearing comfort, and is used to cover the entire internal structure of the flexible fixed cuff.

[0011] Furthermore, the inflatable plastic plate is composed of an upper layer, a lower layer and a gap layer in the middle, and the lower layer provides rigid support to further enhance the stability of the overall structure.

[0012] Furthermore, the upper end of the reverse pneumatic artificial muscle natural latex rubber tube is sealed, and the lower end is fixed to the upper opening of the inflatable plastic plate. The inflatable plastic plate and the reverse pneumatic artificial muscle natural latex rubber tube constitute a pneumatic drive unit, so that the gas transported in the middle gap layer can be independently injected into each IPAM unit to achieve distributed control.

[0013] Furthermore, the piezoelectric ceramic sensor meets strict metal-free and nuclear magnetic compatibility requirements and is used to collect the contact pressure signal between the IPAM and the inner wall of the nuclear magnetic coil.

[0014] Furthermore, the piezoelectric ceramic sensor signal is transmitted to the main control module via a flexible wire. The main control module adopts closed-loop control logic. The piezoelectric ceramic sensor is connected to the control host signal through a flexible wire. When the pressure value reaches the set threshold, the PC immediately issues a control instruction to accurately control the host to stop inflation.

[0015] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0016] 1. The variable-rigidity, adaptive fixation device for the body's detection area for nuclear magnetic resonance imaging (NMR) has a simple structure and is easy to operate. Both the flexible cuff and the IPAM unit are made of flexible, non-magnetic materials, resulting in lightweight and high biocompatibility. Therefore, it can operate stably in the strong magnetic field environment of NMR, avoiding interference with imaging quality.

[0017] 2. The present invention addresses the problems of unstable fixation and excessive local compression caused by the lack of adaptability of traditional rigid stents or conventional inflatable cuffs during MRI examinations. The core advantage of the present invention lies in its IPAM unit. Specifically, the IPAM unit can achieve axial expansion when inflated, up to 300% of its original length. With its excellent contraction performance, it can closely fit the curved surface of the human body examination part after expansion, thereby achieving a highly adaptive fixation effect. At the same time, each IPAM unit is controlled by an independent air circuit, and the inflation volume can be dynamically adjusted according to the morphology of the patient's body examination part, accurately meeting individual fixation needs. In addition, the IPAM unit is made of natural latex rubber tube, which is flexible and has uniform pressure distribution after inflation, effectively avoiding secondary damage to the affected limb caused by excessive local pressure.

[0018] 3. To ensure safe use, the present invention integrates a real-time pressure monitoring and feedback system in the device. Specifically, a piezoelectric ceramic sensor is embedded in the outer layer of the flexible fixation cuff to continuously monitor the contact pressure between the IPAM unit and the inner wall of the nuclear magnetic coil. When the system detects that the local pressure exceeds the preset safety threshold, it will automatically terminate the inflation process, thereby effectively avoiding blood circulation obstruction or tissue compression damage caused by excessive pressure. To improve operational convenience, the inflation system has a built-in one-button control module. Before the inspection, you only need to start the air pump to automatically complete the inflation and fixation. After the inspection, the air is quickly exhausted through the deflation valve, which greatly simplifies the medical operation process and improves work efficiency.

[0019] To summarize, the entire device is made of non-magnetic and non-conductive materials, which meets the strict requirements of the MRI examination environment for electromagnetic compatibility and nuclear magnetic compatibility, ensuring that no interference or safety hazards are generated in high-intensity magnetic fields and radio frequency environments. In terms of structure, the device adopts a modular design, and each functional component can be disassembled independently, which is convenient for quick replacement and efficient cleaning, and can adapt to the actual needs of high-frequency and multi-patient use in clinical practice. The invented device can be widely used in hospitals and imaging diagnostic centers, especially in MRI examination scenarios where the affected limb is sensitive, requires long-term scanning or high-precision imaging, and provides an innovative and practical solution for improving diagnostic accuracy and patient experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the variable stiffness adaptive fixing device for the shape of the human body detection part used in a nuclear magnetic resonance apparatus according to the present invention;

[0022] Figure 2 This is a schematic diagram of a clinical application of the variable stiffness and adaptive fixation device for the shape of a human body detection part used in a nuclear magnetic resonance apparatus according to the present invention;

[0023] Figure 3 This is a schematic diagram of the working principle of the flexible fixed cuff of the present invention;

[0024] Figure 4 It is a schematic diagram of the working principle of the IPAM of the present invention;

[0025] Figure 5 The present invention Figure 3 A in the middle is an enlarged structural diagram;

[0026] Figure 6 This is an output circuit diagram of the variable stiffness adaptive fixation device for the shape of a human body detection part used in a nuclear magnetic resonance apparatus according to the present invention.

[0027] Description of reference numerals:

[0028] 1. Flexible fixed cuff; 2. Cuff Velcro; 3. Rubber connecting tube; 4. Control host; 5. Nuclear magnetic field coil; 6. Skin-friendly fabric outer layer of cuff; 7. Hard plastic plate; 8. Inflatable plastic plate; 9. Natural latex rubber tube for inverse pneumatic artificial muscle; 10. Constraint fiber for inverse pneumatic artificial muscle; 11. Piezoelectric ceramic sensor. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] Example 1

[0035] like Figure 1As shown, the present invention is a variable stiffness adaptive fixing device for the shape of a human body detection part of a nuclear magnetic resonance apparatus, comprising a flexible fixing cuff 1, a cuff Velcro 2, a rubber connecting tube 3 and a control host 4. The flexible fixing cuff 1 is the core fixing component of the device, and a cuff Velcro 2 is provided on the outside thereof. The flexible fixing cuff 1 is connected to the air pump and the air release valve of the control host 4 through the rubber connecting tube 3 to form a closed-loop air path system. The rubber connecting tube 3 penetrates into the interior of the flexible fixing cuff 1 and is connected to the gap layer of the inflatable plastic plate 8. The control host 4 is integrated with a high-precision air pump, an electromagnetic air release valve and a human-computer interaction panel. The air pump is driven by a brushless motor, and the electromagnetic air release valve has a fast exhaust capability. The control host 4 and the flexible fixing cuff 1 are connected by a quick-plug gas-electric interface.

[0036] The flexible fixed cuff 1 can fit closely to the detection part of the human body and can be adaptively adjusted according to the shape of the detection part of the human body of different patients. The cuff Velcro 2 allows medical staff to flexibly adjust the tightness of the flexible fixed cuff 1 according to the patient's limb size and comfort requirements. The design of the Velcro makes the wearing and removal process of the cuff simple and quick. Medical staff can quickly complete the fixation operation for the patient, improving work efficiency. The rubber connecting tube 3 is a key component of the closed-loop air circuit system. It is responsible for transporting the gas generated by the air pump in the control host 4 into the flexible fixed cuff 1, and transporting the gas that needs to be discharged from the flexible fixed cuff 1 back to the air release valve of the control host 4. Through the transmission and circulation of the gas, the internal pressure and stiffness of the flexible fixed cuff 1 are adjusted. The quick-plug gas-electric interface connection makes the connection and disassembly between the control host 4 and the flexible fixed cuff 1 more convenient and quick, which facilitates the assembly, maintenance and replacement of components of the device.

[0037] Example 2

[0038] like Figure 2 、 3 As shown in Figure 4, the flexible fixed cuff 1 is externally sleeved with a nuclear magnetic coil 5, the outer layer of the flexible fixed cuff 1 is a skin-friendly fabric 6 made of medical silicone fiber, and is used to cover the entire internal structure of the flexible fixed cuff 1, an inflatable plastic plate 8 is provided at the lower part of the flexible fixed cuff 1, and the inflatable plastic plate 8 is composed of an upper layer, a lower layer and a gap layer in the middle, and a plurality of inverse pneumatic artificial muscle natural latex rubber tubes 9 are evenly and equidistantly arranged in the internal cavity of the flexible fixed cuff 1, and the plurality of inverse pneumatic artificial muscle natural latex rubber tubes 9 are sleeved with inverse pneumatic artificial muscle restraint fibers 10.

[0039] The nuclear magnetic coil 5 is used to fix the human body detection part and the flexible fixed cuff 1. During the examination process, it can effectively limit the movement of the legs during the examination, thereby reducing the artifacts caused by movement and making the imaging clearer and more accurate. When the air pump starts running, the air flow is injected into each reverse pneumatic artificial muscle natural latex rubber tube 9 along the inflatable plastic plate 8. The reverse pneumatic artificial muscle natural latex rubber tube 9 will produce controllable elongation along the axial direction when inflated, forming a directional tension. By controlling the inflation amount, the expansion degree of the reverse pneumatic artificial muscle natural latex rubber tube 9 can be adjusted. , thereby changing the stiffness of the flexible fixed cuff 1. When gas is injected, the natural latex rubber tube 9 of the inverse pneumatic artificial muscle expands, and the stiffness of the flexible fixed cuff 1 increases, which can better fix the human body detection part; when the gas is discharged, the natural latex rubber tube 9 of the inverse pneumatic artificial muscle contracts, and the stiffness of the flexible fixed cuff 1 decreases, which is convenient for wearing and adjustment. Under the action of the inverse pneumatic artificial muscle constraint fiber 10, the IPAM expands axially to achieve adaptive adjustment of the device to the human body detection part, and achieve adaptive fit to different patients and different detection part shapes.

[0040] Example 3

[0041] like Figure 5 As shown, a hard plastic plate 7 is provided on the upper part of the flexible fixed cuff 1, the upper end of the reverse pneumatic artificial muscle natural latex rubber tube 9 is sealed, and the lower end is fixed to the upper opening of the inflatable plastic plate 8. The inflatable plastic plate 8 and the reverse pneumatic artificial muscle natural latex rubber tube 9 constitute a pneumatic drive unit. A piezoelectric ceramic sensor 11 is embedded between the lower fabric of the flexible fixed cuff 1 and the lower layer of the inflatable plastic plate 8. The piezoelectric ceramic sensor 11 meets the strict metal-free and nuclear magnetic compatibility requirements. The signal of the piezoelectric ceramic sensor 11 is transmitted to the main control module via a flexible wire. The main control module adopts closed-loop control logic. The piezoelectric ceramic sensor 11 is connected to the control host 4 signal via a flexible wire.

[0042] The flexible fixed cuff 1 adopts a multi-layer composite structure, including the outer skin-friendly fabric 6 of the cuff, a hard plastic plate 7, an inflatable plastic plate 8, an inverse pneumatic artificial muscle natural latex rubber tube 9, an inverse pneumatic artificial muscle constraint fiber 10, and a piezoelectric ceramic sensor 11. Each component follows a strict process logic: First, the upper end of the IPAM inverse pneumatic artificial muscle natural latex rubber tube 9 is sealed with a polyamide film or a glass fiber sheet through cyanoacrylate glue, and ensures that its outside is completely covered with the inverse pneumatic artificial muscle constraint fiber 10 to form the basic constraint structure of the IPAM unit. Secondly, the inflatable plastic plate 8 is precisely aligned with the air path interface of the IPAM and fixed with medical-grade epoxy resin to construct an air path transmission channel. Subsequently, in the flexible A piezoelectric ceramic sensor 11 is embedded in the key contact area of the outer layer of the fixed cuff 1 and is connected to the signal processing module of the control host 4 through a flexible wire to complete the integration of the sensing system. The hard plastic plate 7 is then compounded to the outer layer of the flexible fixed cuff through a hot pressing process. The hard plastic plate 7 provides the necessary rigid support for the flexible fixed cuff 1, so that it forms a close contact with the upper end of the IPAM, realizing an organic combination of rigid support and flexible fit. Finally, the cuff air path is connected to the air pump and air release valve of the control host 4 through the rubber connecting tube 3 to form a complete air path closed-loop system. The entire assembly process is constructed layer by layer from the inside to the outside, taking into account the independence of the functional modules and the integrity of the system integration, ensuring that the components work together to realize pressure regulation and signal acquisition functions.

[0043] Working principle of the present invention:

[0044] Refer to the instruction manual Figure 1-6 When using the present invention, the device enters the working state immediately after being powered on. The patient places the human body detection part on the flexible fixed cuff 1 body and wraps it around it, ensuring that the cuff area with the integrated piezoelectric ceramic sensor 11 covers the human body detection part. Then, the human body detection part and the flexible fixed cuff 1 are moved as a whole into the nuclear magnetic coil 5 for fixation. The air pump of the control host 4 is then started, and the air flow is accurately injected into each IPAM unit along the inflatable plastic plate 8 in the flexible fixed cuff 1. Figure 4 As shown, the inflated IPAM unit produces significant axial expansion, and its length can reach 300% of its original length. During this expansion process, the IPAM can adapt to the contour differences of the human body detection parts and realize deformation adjustment, finally forming the following Figure 2 The tight wrapping effect shown in the figure is as follows. During the inflation process, the piezoelectric ceramic sensor 11 on the flexible fixed cuff 1 continuously monitors the contact pressure between the outer side of the flexible fixed cuff 1 and the inner wall of the nuclear magnetic coil 5. When the detection pressure reaches the preset threshold, the PC immediately sends a command to the control host 4 to accurately terminate the inflation process. After the detection is completed, the control host 4 opens the deflation valve to discharge the gas in the flexible fixed cuff 1. The IPAM then contracts and the flexible fixed cuff 1 relaxes. The patient can then be safely removed from the human body detection area. The overall circuit diagram is shown in the figure. Figure 6 shown.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for self-adapting the shape of a human body detection part for a nuclear magnetic resonance apparatus, comprising a flexible fixing cuff (1), a cuff Velcro (2), a rubber connecting tube (3) and a control host (4), characterized in that: The flexible fixed cuff (1) is the core fixed component of the device, and a cuff Velcro (2) is provided on the outside of the flexible fixed cuff (1). The flexible fixed cuff (1) is connected to the air pump and the air release valve of the control host (4) through a rubber connecting tube (3) to form a closed-loop air path system. The flexible fixed cuff (1) is provided with a nuclear magnetic coil (5) on the outside, a hard plastic plate (7) is provided on the upper part of the flexible fixed cuff (1), and an inflatable plastic plate (8) is provided on the lower part of the flexible fixed cuff (1). A plurality of reverse pneumatic artificial muscle natural latex rubber tubes (9) are evenly arranged at equal distances in the internal cavity of the flexible fixed cuff (1), and a plurality of reverse pneumatic artificial muscle natural latex rubber tubes (9) are provided with reverse pneumatic artificial muscle constraint fibers (10). A piezoelectric ceramic sensor (11) is embedded between the lower fabric of the flexible fixed cuff (1) and the lower layer of the inflatable plastic plate (8).

2. The self-adaptive fixing device for the human body detection part of a nuclear magnetic resonance apparatus according to claim 1, characterized in that: The control host (4) is integrated with a high-precision air pump, an electromagnetic air release valve, and a human-machine interaction panel; the air pump is driven by a brushless motor; the electromagnetic air release valve has a rapid exhaust capability; and the control host (4) and the flexible fixed cuff (1) are connected by a quick-plug air-electric interface.

3. The self-adaptive fixing device for the human body detection part of a nuclear magnetic resonance apparatus according to claim 1, characterized in that: The rubber connecting tube (3) penetrates into the interior of the flexible fixed cuff (1) and is connected to the gap layer of the inflatable plastic plate (8).

4. The self-adaptive fixing device for the human body detection part of a nuclear magnetic resonance apparatus according to claim 3, characterized in that: The outer layer of the flexible fixing cuff (1) is a skin-friendly outer layer fabric (6) of the cuff, which is made of medical silicone fiber and is used to cover the entire internal structure of the flexible fixing cuff (1).

5. The self-adaptive fixing device for the human body detection part of a nuclear magnetic resonance apparatus according to claim 3, characterized in that: The inflatable plastic plate (8) consists of an upper layer, a lower layer and a gap layer in the middle.

6. The self-adaptive fixing device for the human body detection part of a nuclear magnetic resonance apparatus according to claim 1, characterized in that: The upper end of the reverse pneumatic artificial muscle natural latex rubber tube (9) is sealed, and the lower end is fixed to the upper opening of the inflatable plastic plate (8). The inflatable plastic plate (8) and the reverse pneumatic artificial muscle natural latex rubber tube (9) constitute a pneumatic drive unit.

7. The self-adaptive fixing device for the human body detection part of a nuclear magnetic resonance apparatus according to claim 1, characterized in that: The piezoelectric ceramic sensor (11) meets strict metal-free and nuclear magnetic compatibility requirements.

8. The self-adaptive fixing device for the human body detection part of a nuclear magnetic resonance apparatus according to claim 7, characterized in that: The piezoelectric ceramic sensor (11) signal is transmitted to the main control module via a flexible wire. The main control module adopts closed-loop control logic. The piezoelectric ceramic sensor (11) is connected to the control host (4) signal via a flexible wire.

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