Noise reduction protection device for nuclear magnetic resonance

Abstract

The invention relates to the technical field of nuclear magnetic resonance, in particular to a noise reduction protection device for nuclear magnetic resonance, which comprises a nuclear magnetic resonance body, the nuclear magnetic resonance body is composed of a machine body, a machine base, a sliding table, a bed body and a support plate, and the support plate is provided with a noise reduction protection structure; the noise reduction protection structure comprises two first shells which are symmetrically arranged, a second shell which is arranged in front of and behind the two first shells and is in sliding connection with the two first shells, a third shell, a fourth shell which is arranged above the position between the two first shells, and a fifth shell which is fixedly connected to the lower surface of the third shell. The earmuff and the massage equipment are combined for use, extra relaxation and comfort can be provided while noise is reduced, the comprehensive design is more humanized, discomfort of a patient in the nuclear magnetic resonance examination process can be relieved, the examination experience and satisfaction degree of the patient can be improved, discomfort possibly caused by long-time wearing of the earmuff can be relieved, and the comfort of the patient is improved. And the nuclear magnetic resonance equipment is not influenced.

Description

Technical Field

[0001] The invention relates to a noise reduction and protection device for nuclear magnetic resonance, in particular to a noise reduction and protection device for nuclear magnetic resonance, and belongs to the technical field of nuclear magnetic resonance. Background Art

[0002] Nuclear magnetic resonance is to place the human body in a special magnetic field and use radio frequency pulses to stimulate the hydrogen nuclei in the human body, causing the hydrogen nuclei to resonate and absorb energy. After the radio frequency pulses are stopped, the hydrogen nuclei emit radio signals at a specific frequency and release the absorbed energy, which is collected by the receiver outside the body and processed by a computer to obtain an image. However, nuclear magnetic resonance will generate a certain amount of noise when it occurs, which will affect the human body. Therefore, noise reduction protection is required for patients during nuclear magnetic resonance.

[0003] Chinese invention patent CN108836334B discloses "a noise reduction and protection device for nuclear magnetic resonance, including a lying board, wherein sliding grooves are provided on the front and rear sides of the upper surface of the lying board. The ear protection cover can be driven to move by a second electric telescopic rod, and the patient's ears can be protected by the ear protection cover. The noise reduction and protection device for nuclear magnetic resonance has a simple structure and is easy to operate. It can not only protect the patient's body, but also protect the patient's ears, and is more convenient to use."

[0004] The above patent has the following shortcomings: in order to reduce noise, a sliding shielding cover is set on the bed to achieve the noise reduction effect. However, the setting of the shielding cover will occupy a certain inspection space and may limit the movement range of the MRI equipment in a specific direction, which may affect the execution of certain complex inspections, such as scanning sequences that require a large range of movement or inspections in special positions; and in order to facilitate the support of the patient's head, a large number of electronic devices are installed on the bed. These electronic devices generate electromagnetic radiation or interference when working, which will affect the magnetic field environment or signal acquisition of the nuclear magnetic resonance, thereby causing a decrease in imaging quality.

[0005] Therefore, it is urgent to improve the noise reduction and protection equipment to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a noise reduction and protection device for nuclear magnetic resonance, which can effectively isolate or reduce the introduction of external noise, help patients relax their bodies and minds, relieve tension caused by noise, unfamiliar environment and other factors, help patients better cooperate with the examination, and improve the accuracy and efficiency of the examination.

[0007] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present invention includes: a noise reduction protection device for nuclear magnetic resonance, comprising a nuclear magnetic resonance body, the nuclear magnetic resonance body is composed of a body, a base, a slide, a bed and a support plate, and a noise reduction protection structure is arranged on the support plate; The noise reduction protection structure comprises two first shells arranged symmetrically, a second shell arranged in front and behind the two first shells and slidably connected to the two first shells, a third shell, a fourth shell arranged above the two first shells, and a fifth shell fixedly connected to the lower surface of the third shell, the lower surfaces of the two first shells are fixedly connected with a first connecting shell, and the bottom side of the first connecting shell is fixedly connected with an earmuff for the patient to wear for noise reduction; An adjustment structure for adjusting the fourth shell is provided between the second shell and the third shell, the adjustment structure comprising two guide blocks fixedly connected to opposite sides of the second shell and the third shell and arranged up and down, a second connecting shell fixedly connected to the outside of the fourth shell and extending into the first shell and slidably connected thereto, and a connecting arm is hingedly installed on the outer surface of the bottom end of the second connecting shell on the upper and lower guide blocks; The second shell, the third shell and the fourth shell are all provided with a massage structure inside for use with earmuffs to enhance the noise reduction and protection effect. The massage structure includes an air supply pipe, an air bag, a return spring, an abutment block and a massage head.

[0008] Preferably, a support pad for supporting the patient's neck is fixedly mounted on one end of the support plate away from the bed body, and an anti-slip pad is mounted on the upper surface of the support pad to enhance the comfort of the patient's neck support.

[0009] Preferably, a connecting structure is buckled between the lower surface of the support plate and the earmuff, and the connecting structure consists of a lock and an elastic rope, one end of the elastic rope is rotatably connected to the outer surface of the earmuff, and the lock is fixedly connected to the other end of the elastic rope and hooked on the lower surface of the support plate to limit the noise reduction protection structure.

[0010] Preferably, telescopic grooves are provided on opposite sides of the second shell and the third shell, and two guide blocks distributed upper and lower extend to the inside of the second shell and the third shell respectively through the telescopic grooves for adjusting the distance between the second shell and the third shell, and the fourth shell is adjusted up and down by using the connecting arm, thereby adjusting the size of the noise reduction protection structure, making it easier for the noise reduction protection structure to adapt to patients with different head shapes.

[0011] Preferably, the second connecting shell is composed of two sleeve shells and an extension shell, the bottom end of the extension shell is fixed to the top end of the bottom sleeve shell, and the other end of the extension shell extends into the top sleeve shell; Wherein, adjustment holes are provided inside the extension shell and the top sleeve shell, and locking blocks for adjusting the length of the second connecting shell are installed in the adjustment holes.

[0012] Preferably, cavities are opened inside the second shell, the third shell and the fourth shell, the number of the airbags is three, the three airbags are respectively installed inside the second shell, the third shell and the fourth shell, and the three airbags are connected by connecting pipes, and the airbag located inside the third shell is installed with a gas pipe extending to the outside of the third shell and connected to the gas transmission equipment.

[0013] Preferably, the return spring is fixedly connected between the bottom wall of the cavity and the abutment block, the massage head is threadedly mounted on a side of the abutment block close to the return spring, and the return spring surrounds the outside of the massage head; Among them, the interiors of the second shell, the third shell and the fourth shell are all provided with through holes connected to the cavity for use of the massage head, and the massage head extends through the through holes to the outside of the second shell, the third shell and the fourth shell to massage the patient.

[0014] Preferably, an arc-shaped groove is provided inside the fourth shell to facilitate the fourth shell to better fit the patient's head, and a pad is installed on the inner side of the fifth shell.

[0015] Preferably, positioning holes are provided inside the two first shells and inside the upper and lower guide blocks, and positioning blocks for fixing the second shell and the third shell are inserted into the positioning holes.

[0016] Preferably, a visor that can extend outside the second shell is slidably mounted inside the second shell, and locking blocks for fixing are mounted inside the second shell and the visor.

[0017] The present invention has at least the following beneficial effects: 1. The noise reduction protection device for MRI combines earmuffs with massage equipment to provide additional relaxation and comfort while reducing noise. This comprehensive design is more humane, helps to reduce the discomfort of patients during MRI examinations, improves the examination experience and satisfaction of patients, can reduce the discomfort that may be caused by wearing earmuffs for a long time, and will not affect the use of MRI equipment.

[0018] 2. The noise reduction protection device for nuclear magnetic resonance imaging can not only limit the second shell and the third shell through two guide blocks distributed up and down, but also be used to adjust the distance between the second shell and the third shell, and utilize the installation of the connecting arm to adjust the fourth shell up and down, so as to adjust the size of the noise reduction protection structure, so that the noise reduction protection structure can be suitable for patients with different head shapes, so that patients can wear it better, thereby improving the applicability of the noise reduction protection structure.

[0019] 3. The noise reduction protection device for nuclear magnetic resonance imaging, after the patient wears the noise reduction protection structure, the patient's eyes are shielded by extending the eye shield to the outside of the second shell, which has multiple benefits such as reducing the impact of electromagnetic radiation, improving image quality, preventing adverse reactions caused by contrast agents, protecting eyesight, alleviating claustrophobia and improving patient comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the bed structure of the present invention; Figure 3 It is a schematic diagram of the noise reduction protection structure and the connection structure of the present invention; Figure 4 It is a schematic diagram of the noise reduction protection structure of the present invention; Figure 5 It is a schematic diagram of the structure of the second shell and the third shell of the present invention; Figure 6 For the present invention Figure 5 A is a schematic diagram of the enlarged structure shown; Figure 7 It is a schematic diagram of the structure of the eye shield of the present invention; Figure 8 is a cross-sectional view of a third shell structure of the present invention; Fig. 9 is a schematic diagram of the second connection shell structure of the present invention; Fig.10 It is a schematic diagram of the fourth shell structure of the present invention.

[0021] In the figure, 1, machine body; 2, machine base; 3, slide; 4, bed; 5, support plate; 6, support pad; 7, noise reduction protection structure; 8, connecting structure; 801, lock; 802, elastic rope; 9, first shell; 10, second shell; 11, third shell; 12, fourth shell; 1201, groove; 13, first connecting shell; 14, earmuff; 15, second connecting shell; 1501, sleeve shell; 1502, extension shell; 1503, adjustment hole; 1504, locking block; 16, fifth shell; 17, guide block; 18, connecting arm; 19, telescopic slot; 20, positioning hole; 21, positioning block; 22, air supply pipe; 23, air bag; 24, return spring; 25, abutment block; 26, massage head; 27, perforation; 28, cavity; 29, eye shield; 30, locking block. DETAILED DESCRIPTION

[0022] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0023] like Figure 1 and Figure 2 As shown, the present embodiment provides a noise reduction and protection device for nuclear magnetic resonance, comprising a nuclear magnetic resonance body, the nuclear magnetic resonance body consisting of a body 1, a base 2, a slide 3, a bed 4 and a support plate 5, an end of the support plate 5 away from the bed 4 is fixedly installed with a support pad 6 for supporting the patient's neck, and an anti-slip pad is installed on the upper surface of the support pad 6 to enhance the comfort of the patient's neck support.

[0024] In order to protect the patient, in this embodiment, Figure 3 and Figure 4 As shown, a noise reduction protection structure 7 is provided on the support plate 5. The noise reduction protection structure 7 includes two symmetrically arranged first shells 9, a second shell 10 arranged in front and behind the two first shells 9 and slidably connected to the two first shells 9, a third shell 11, a fourth shell 12 arranged above between the two first shells 9, and a fifth shell 16 fixedly connected to the lower surface of the third shell 11. The lower surfaces of the two first shells 9 are fixedly connected with a first connecting shell 13, and the bottom side of the first connecting shell 13 is fixedly connected with an earmuff 14 for patients to wear for noise reduction. The outer surface of the earmuff 14 is sleeved with a soft cover, which can be convenient for patients to wear and protect the patient's ears, and the sound insulation material filled inside can effectively isolate external noise. The first connecting shell 13 is elastic, which is convenient for patients to wear the earmuff 14 better.

[0025] Specifically, Figure 3 As shown, a connecting structure 8 is buckled between the lower surface of the support plate 5 and the earmuff 14, and the connecting structure 8 is composed of a lock buckle 801 and an elastic rope 802. One end of the elastic rope 802 is rotatably connected to the outer surface of the earmuff 14, and the lock buckle 801 is fixedly connected to the other end of the elastic rope 802 and hooked on the lower surface of the support plate 5 to limit the noise reduction protection structure 7.

[0026] In order to facilitate patients to wear better, such as Figure 5 , Figure 6 and Fig. 9 As shown, an adjustment structure for adjusting the fourth shell 12 is arranged between the second shell 10 and the third shell 11, and the adjustment structure includes two guide blocks 17 fixedly connected to the opposite sides of the second shell 10 and the third shell 11 and arranged up and down, and a second connecting shell 15 fixedly connected to the outside of the fourth shell 12 and extending into the first shell 9 and slidingly connected thereto, and a connecting arm 18 is hingedly installed on the outer surface of the lower and upper guide blocks 17 and the bottom end of the second connecting shell 15.

[0027] Specifically, Figure 6 As shown, a telescopic groove 19 is opened on the opposite side of the second shell 10 and the third shell 11, and two guide blocks 17 distributed up and down extend to the inside of the second shell 10 and the third shell 11 respectively through the telescopic groove 19 to adjust the distance between the second shell 10 and the third shell 11, and the connecting arm 18 is used to adjust the fourth shell 12 up and down, thereby adjusting the size of the noise reduction protection structure 7, so that the noise reduction protection structure 7 is suitable for patients with different head shapes.

[0028] In order to further improve the adjustment of the noise reduction protection structure 7, as Fig. 9 As shown, the second connection shell 15 is composed of two sleeve shells 1501 and an extension shell 1502. The bottom end of the extension shell 1502 is fixed to the top of the bottom sleeve shell 1501, and the other end of the extension shell 1502 extends into the top sleeve shell 1501; wherein, the extension shell 1502 and the top sleeve shell 1501 are both provided with adjustment holes 1503, and the adjustment holes 1503 are provided with locking blocks 1504 for adjusting the length of the second connection shell 15. There are two second connection shells 15, and the two second connection shells 15 extend into the two first shells 9 respectively. The length of the second connection shell 15 is adjusted by plugging and matching the locking blocks 1504 with the adjustment holes 1503, so that the fourth shell 12 can better contact the patient's head.

[0029] In this embodiment, if Figure 5 and Fig.10 As shown, an arc-shaped groove 1201 is provided inside the fourth shell 12, so that the fourth shell 12 can better fit the patient's head, and a pad is installed on the inner side of the fifth shell 16 to protect the patient's head. Positioning holes 20 are provided inside the two first shells 9 and inside the upper and lower guide blocks 17, and positioning blocks 21 for fixing the second shell 10 and the third shell 11 are inserted into the positioning holes 20. There are four guide blocks 17 in total, and the four guide blocks 17 are respectively installed on the opposite side of the second shell 10 and the third shell 11. The two positioning holes 20 are arranged opposite to each other, and can fix the second shell 10 and the third shell 11 respectively, to ensure the wearing stability of the noise reduction protection structure 7.

[0030] In order to protect the patient, in this embodiment, Figure 4-Figure 8As shown, the second shell 10, the third shell 11 and the fourth shell 12 are all provided with a massage structure for cooperating with the earmuffs 14 to enhance the noise reduction and protection effect, and the massage structure includes an air supply pipe 22, an air bag 23, a return spring 24, an abutment block 25 and a massage head 26. By starting the air supply device to cooperate with the air supply pipe 22 to inflate and deflate the inside of the air bag 23, when the air bag 23 is inflated and deflated, it will present a cyclic state of expansion and contraction, thereby driving the massage head 26 to expand and contract. When the massage head 26 is in an expanded state, it will press the top of the wearer's head and the temple area, and when it is contracted, it will be separated from the top of the wearer's head, thereby achieving a massage effect in a reciprocating state.

[0031] Specifically, Figure 8 As shown, the second shell 10, the third shell 11 and the fourth shell 12 are all provided with a cavity 28, the number of airbags 23 is three, the three airbags 23 are respectively installed in the second shell 10, the third shell 11 and the fourth shell 12, and the three airbags 23 are connected with a connecting pipe, and the airbag 23 located in the third shell 11 is provided with an air supply pipe 22 extending to the outside of the third shell 11 and connected to the air supply device, and the air supply device is provided with a control valve, which can control the massage intensity according to the demand. The reset spring 24 is fixedly connected between the inner bottom wall of the cavity 28 and the abutment block 25, the massage head 26 is threadedly installed on the side of the abutment block 25 close to the reset spring 24, and the reset spring 24 surrounds the outside of the massage head 26; wherein, the second shell 10, the third shell 11 and the fourth shell 12 are all provided with a through hole 27 connected with the cavity 28 for the use of the massage head 26, and the massage head 26 extends through the through hole 27 to the outside of the second shell 10, the third shell 11 and the fourth shell 12 to massage the patient. There are multiple massage heads 26 , and the multiple massage heads 26 are arranged at equal intervals.

[0032] It should be noted that the noise reduction protection structure 7 and the massage device are made of non-magnetic materials and are reasonably designed so as not to interfere with the collection of magnetic fields or signals. The earmuffs 14 can be used in combination with the massage device to provide additional relaxation and comfort while reducing noise. This comprehensive design is more humane, helps to reduce the discomfort of patients during the MRI examination, improves the patient's examination experience and satisfaction, can reduce the discomfort that may be caused by wearing the earmuffs 14 for a long time, and will not affect the use of the MRI equipment.

[0033] In order to further improve the protection effect, Figure 4As shown, a visor 29 that can extend outside the second shell 10 is slidably installed inside the second shell 10, and a locking block 30 for fixing is installed inside the second shell 10 and the visor 29. After the patient wears the noise reduction protection structure 7, the visor 29 is extended to the outside of the second shell 10 to shield the patient's eyes, which has multiple benefits such as reducing the impact of electromagnetic radiation, improving image quality, preventing adverse reactions caused by contrast agents, protecting eyesight, alleviating claustrophobia and improving patient comfort.

[0034] Understandably, shielding the patient's eyes during an MRI has many benefits, such as: Reducing the impact of electromagnetic radiation: Electromagnetic radiation is generated during an MRI, and the eyes are more sensitive to electromagnetic radiation. Shielding the eyes can reduce the direct effect of electromagnetic radiation on the eyes and reduce the occurrence of allergic or uncomfortable reactions due to electromagnetic radiation. Improving image quality: During an MRI, if the patient opens his eyes, the clarity of the image may be disturbed by factors such as eye movement or light reflection, thereby affecting the doctor's judgment of the condition. Shielding the eyes can reduce this interference and improve the accuracy of the image. Preventing adverse reactions caused by contrast agents: Some patients need to inject gadolinium-containing contrast agents during MRI examinations to enhance the scanning effect. This contrast agent may cause some adverse reactions, such as allergic reactions and even induce epileptic seizures. If the patient is in an open-eyed state, the probability of these adverse reactions may increase. Shielding the eyes can reduce this risk to a certain extent. Protecting eyesight: The magnetic field strength used in MRI examinations is relatively high, which may cause calcium deposition in the retina, leading to problems such as decreased vision. Covering the eyes can reduce the direct effects of magnetic fields on the eyes and protect vision from potential damage. Relieve claustrophobia: Claustrophobia is an anxiety disorder that produces an intense fear and avoidance behavior of enclosed spaces. Covering the eyes can reduce the patient's visual perception of enclosed spaces, thereby alleviating the symptoms of claustrophobia to a certain extent. Improve patient comfort: During an MRI examination, factors such as the noise and light emitted by the machine may make the patient feel uncomfortable. Covering the eyes can reduce the discomfort caused by light stimulation and improve the patient's overall comfort.

[0035] like Figure 1-Figure 10 As shown, the principle of the noise reduction protection device for nuclear magnetic resonance provided by this embodiment is as follows: When in use, the noise reduction protection structure 7 is worn on the patient's head, and the earmuffs 14 are used as sound insulation equipment to effectively isolate or reduce the introduction of external noise. During the MRI examination, since the equipment generates loud noise when it is running, these noises may cause discomfort or anxiety to the patient. Wearing earmuffs 14 can significantly reduce the direct stimulation of the noise on the patient's ears, allowing the patient to be examined in a quieter environment, and by starting the air supply equipment and cooperating with the air supply pipe 22 to inflate and deflate the interior of the airbag 23, when the airbag 23 is inflated and deflated, it will present a cyclic state of expansion and contraction, thereby driving the massage head 26 to expand and contract. When the massage head 26 is in an expanded state, it will press the top of the wearer's head and temples, and will be separated from the top of the wearer's head when it contracts, thereby achieving a massage effect in a reciprocating state.

[0036] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0037] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0038] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A noise reduction protection device for nuclear magnetic resonance, comprising a nuclear magnetic resonance body, characterized in that: The nuclear magnetic resonance body is composed of a machine body (1), a machine base (2), a slide table (3), a bed (4) and a support plate (5), and a noise reduction protection structure (7) is provided on the support plate (5); The noise reduction protection structure (7) comprises two first shells (9) arranged symmetrically, a second shell (10) arranged in front and behind the two first shells (9) and slidably connected to the two first shells (9), a third shell (11), a fourth shell (12) arranged above the two first shells (9), and a fifth shell (16) fixedly connected to the lower surface of the third shell (11), the lower surfaces of the two first shells (9) are fixedly connected to the first connecting shell (13), and the bottom side of the first connecting shell (13) is fixedly connected to an earmuff (14) for a patient to wear for noise reduction; An adjustment structure for adjusting the fourth shell (12) is provided between the second shell (10) and the third shell (11), the adjustment structure comprising two guide blocks (17) fixedly connected to opposite sides of the second shell (10) and the third shell (11) and arranged up and down, a second connecting shell (15) fixedly connected to the outside of the fourth shell (12) and extending into the first shell (9) and slidably connected thereto, and a connecting arm (18) is hingedly mounted on the outer surface of the bottom end of the two guide blocks (17) and the second connecting shell (15); The second shell (10), the third shell (11) and the fourth shell (12) are each provided with a massage structure for use with the earmuffs (14) to enhance the noise reduction and protection effect, the massage structure comprising an air supply pipe (22), an air bag (23), a return spring (24), an abutment block (25) and a massage head (26).

2. A noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: A support pad (6) for supporting the patient's neck is fixedly mounted on one end of the support plate (5) away from the bed body (4), and an anti-slip pad is mounted on the upper surface of the support pad (6) to enhance the comfort of the patient's neck support.

3. The noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: A connection structure (8) is buckled between the lower surface of the support plate (5) and the earmuff (14), and the connection structure (8) is composed of a lock buckle (801) and an elastic rope (802), one end of the elastic rope (802) is rotatably connected to the outer surface of the earmuff (14), and the lock buckle (801) is fixedly connected to the other end of the elastic rope (802) and hooked on the lower surface of the support plate (5) to limit the noise reduction protection structure (7).

4. The noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: The second shell (10) and the third shell (11) are each provided with a telescopic slot (19) on one side opposite to the other, and two guide blocks (17) distributed up and down extend through the telescopic slot (19) to the inside of the second shell (10) and the third shell (11) respectively for adjusting the spacing between the second shell (10) and the third shell (11), and the fourth shell (12) is adjusted up and down by using the connecting arm (18), thereby adjusting the size of the noise reduction protection structure (7), so that the noise reduction protection structure (7) is suitable for patients with different head shapes.

5. The noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: The second connecting shell (15) is composed of two sleeve shells (1501) and an extension shell (1502), the bottom end of the extension shell (1502) is fixed to the top end of the bottom sleeve shell (1501), and the other end of the extension shell (1502) extends into the top sleeve shell (1501); The extension shell (1502) and the top cover shell (1501) are both provided with adjustment holes (1503), and a locking block (1504) for adjusting the length of the second connection shell (15) is installed in the adjustment hole (1503).

6. The noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: The second shell (10), the third shell (11) and the fourth shell (12) are each provided with a cavity (28). The number of the airbags (23) is three. The three airbags (23) are respectively installed inside the second shell (10), the third shell (11) and the fourth shell (12). A connecting pipe is connected between the three airbags (23). The airbag (23) located inside the third shell (11) is provided with a gas supply pipe (22) extending to the outside of the third shell (11) and connected to a gas supply device.

7. The noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: The return spring (24) is fixedly connected between the inner bottom wall of the cavity (28) and the abutment block (25), the massage head (26) is threadedly mounted on a side of the abutment block (25) close to the return spring (24), and the return spring (24) surrounds the outside of the massage head (26); The second shell (10), the third shell (11) and the fourth shell (12) are each provided with a through hole (27) connected to the cavity (28) for use with a massage head (26), and the massage head (26) extends through the through hole (27) to the outside of the second shell (10), the third shell (11) and the fourth shell (12) to massage the patient.

8. The noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: An arc-shaped groove (1201) is provided inside the fourth shell (12) to facilitate the fourth shell (12) to better fit the patient's head, and a protective pad is installed on the inner side of the fifth shell (16).

9. The noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: Positioning holes (20) are provided inside the two first shells (9) and inside the upper and lower guide blocks (17), and positioning blocks (21) for fixing the second shell (10) and the third shell (11) are inserted into the positioning holes (20).

10. The noise reduction protection device for nuclear magnetic resonance according to claim 1, characterized in that: A visor (29) that can extend outside the second shell (10) is slidably mounted inside the second shell (10), and a locking block (30) for fixing is mounted inside the second shell (10) and the visor (29).

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