Head and neck fixation device for brain MRI

Abstract

The present invention relates to the field of nuclear magnetic resonance (NMR) devices and discloses a head and neck fixation device for brain NMR, comprising an examination bed, a head and neck fixation portion, a skull fixation portion, an air storage portion, and a trigger portion. The examination bed comprises a base and a movable bed plate slidably arranged on the top surface of the base, the top surface of the movable bed plate being provided with a bed surface, and a pillow being arranged on one end of the bed surface; the head and neck fixation portion is arranged on the pillow, and a headrest cavity surrounded by a flexible material is formed on the head and neck fixation portion; the skull fixation portion is movably arranged on the pillow and is located on a side of the head and neck fixation portion away from the bed surface; the air storage portion is arranged on a side of the bed surface close to the pillow to correspond to the back of a user, and the air storage portion is connected and cooperated with the head and neck fixation portion for storing air when the user lies on the bed surface; the trigger portion is arranged on the pillow and connected and cooperated with the skull fixation portion. Through the cooperation of the head and neck fixing part and the skull fixing part, when the user lies on his back on the bed and rests his head on the headrest cavity, the skin on both sides of the head can be contracted and squeezed from both sides of the head. The headrest cavity surrounded by flexible material can fit along the contour of the part contacted by the head when restricting the head, thereby greatly reducing or even eliminating the user's discomfort; through the cooperation of the air storage part and the trigger part, the fixing effect and stability of the headrest are further improved to ensure that the user's head is difficult to move during the examination, while improving comfort.

Description

Technical Field

[0001] The present invention relates to the field of nuclear magnetic resonance devices, in particular to a head and neck fixation device for brain nuclear magnetic resonance. Background Art

[0002] Magnetic resonance imaging (MRI), also known as nuclear magnetic resonance examination, is another major advancement in medical imaging after CT (CT: computed tomography). Its basic principle is to place the human body in a special magnetic field and use radio frequency pulses to excite 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 then collected by a receiver outside the body and processed by a computer to obtain an image. This is called nuclear magnetic resonance imaging.

[0003] When a head MRI examination is required, the patient's head position may change due to limb movements and other reasons when lying flat on the examination bed, which requires the patient to cooperate with medical staff to adjust the head position, thereby increasing the examination time; and it may also cause artifacts in the magnetic resonance imaging, resulting in a decrease in image quality, masking lesions or the appearance of false lesions, resulting in missed diagnosis or misdiagnosis. For this reason, it is necessary to set a fixator on the examination bed. In order to ensure that the head can be firmly restrained, most of the existing fixators use plate-like structures located on both sides of the patient's head to position the patient's head by moving toward each other to solve the problem of the patient's head position change. However, although this method is feasible, since the two sides of the head correspond to the patient's ear structure, in order to ensure that the patient's head is better restrained, the plate-like structure needs to be pressed against the two sides of the patient's head, which makes the ears on both sides of the patient's head very easy to feel uncomfortable due to the hard contact and squeezing of the plate-like structure. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a head and neck fixation device for brain magnetic resonance imaging to solve the problem of poor comfort in use of the fixator.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a head and neck fixation device for brain magnetic resonance imaging, comprising an examination bed, a head and neck fixation part, a skull fixation part, an air storage part and a trigger part, the examination bed comprising a base and a movable bed plate slidably arranged on the top surface of the base and movable along the length direction, the top surface of the movable bed plate having a bed surface for the patient to lie flat on, and a pillow being arranged on one end of the bed surface; the head and neck fixation part is arranged on the pillow, and a headrest cavity surrounded by a flexible material is formed on the head and neck fixation part for supporting the head and neck of the user; the skull fixation part is movably arranged on the pillow and is located on the side of the head and neck fixation part away from the bed surface; the air storage part is arranged on the side of the bed surface close to the pillow to correspond to the back of the user, the air storage part is connected and cooperated with the head and neck fixation part for storing air when the user lies on the bed surface; the trigger part is arranged on the pillow and connected and cooperated with the skull fixation part, and the trigger part is used to At the same time, the triggering part causes the top of the skull fixing part to move to press the user's head from the top of the user's head to further restrain the head.

[0006] Furthermore, the head and neck fixing portion includes two first fixing seats symmetrically and spaced apart on the pillow, and a flexible head girth and a flexible neck girth arranged in an arc shape on the inner side of the first fixing seats and spaced apart along the length direction of the bed surface, the flexible head girth and the flexible neck girth are both made of flexible material and have a hollow and sealed first sealing cavity inside, so that the gas in the first sealing cavity cannot pass through the flexible head girth and the flexible neck girth; the flexible head girth and the flexible neck girth both have a supporting section located on the pillow for supporting the patient's head, and a supporting section located on the inner side walls of the first fixing seats on both sides and respectively The side sections are used to support the patient's head and neck. The headrest cavity is formed by the side sections and the supporting section, so that the user's head and neck can lie on their backs in the headrest cavity. The air storage part is connected to and communicates with the first sealed cavities, and the supporting section and the side sections are deflated when the connection between the air storage part and the first sealed cavity is disconnected by the trigger part. After the user's head lies on his back in the headrest cavity, the air storage part and the trigger part cooperate to inflate the first sealed cavity to expand it and support the head and neck until a preliminary balance is formed between the supporting section and the side sections and they remain stable, thereby restricting the head.

[0007] Furthermore, the skull fixing portion includes a second fixing seat movably arranged on the pillow and a flexible skull girdle arranged in an arc shape on the side of the second fixing seat facing the headrest cavity. The second fixing seat can swing relative to the headrest cavity. The flexible skull girdle is made of a flexible material and has a hollow sealed second sealed cavity inside. The triggering portion is connected to and communicated with the second sealed cavity. The flexible skull girdle is in a deflated state when the triggering portion is not triggered, so that after the user's head is resting on the headrest cavity, the triggering portion is inflated into the second sealed cavity to expand the flexible skull girdle, thereby supporting the user's skull and enhancing the fixation effect of the head.

[0008] Furthermore, the air storage part includes an elastic part arranged on the movable bed board and protruding from the bed surface, and an air storage part respectively connected to the elastic part and the first sealed cavity. The elastic part inflates the air storage part when the user lies on the bed surface with his back. When the trigger part opens the connection between the air storage part and the first sealed cavity, the gas in the air storage part is inflated into the first sealed cavity to shrink the headrest cavity.

[0009] Furthermore, the elastic part includes a first sliding cavity formed concave on the bed surface, a first pressure plate sealed and slidably arranged in the first sliding cavity along the vertical direction, and a first spring arranged in the first sliding cavity along the vertical direction and located below the first pressure plate. A first channel connecting the first sliding cavity and the air storage part is formed on the movable bed board. In a normal state, the first spring causes the top of the first pressure plate to extend upward to the outside of the first sliding cavity. When the user lies on his back on the bed surface, the back presses down the first pressure plate and compresses the first spring, thereby squeezing the gas in the first sliding cavity toward the air storage part, so that the air storage part can inflate the first sealed cavity.

[0010] Furthermore, a second channel connecting the outside of the moving bed board and the first sliding cavity is opened on the movable bed board, and a one-way valve is provided in the second channel for allowing external air to enter therein, so that after the user completes the inspection and stands up, the first spring rebounds and stretches, allowing the first pressure plate to slide quickly in the first sliding cavity.

[0011] Furthermore, the air storage portion includes a second sliding cavity formed on the movable bed plate, a second pressure plate sealed and slidingly arranged in the second sliding cavity, and a second spring arranged in the second sliding cavity along the sliding direction of the second pressure plate, the second pressure plate dividing the second sliding cavity into a first chamber connected to the first channel and a second chamber connected to the outside of the movable bed plate, the first chamber connected to the first sealed cavity; the second spring is located in the second cavity and its two ends are respectively abutted against the second pressure plate and the second sliding cavity, when the first spring is in a normal state, the first cavity is smaller, when the user's back squeezes the first pressure block, the gas in the first sliding cavity squeezes the second pressure plate when the gas storage portion and the first sealed cavity are connected and disconnected, and the second spring is compressed, and at the same time, the volume of the first cavity increases to realize gas storage, and after the first sealed cavity and the first cavity are connected, the stored gas can be used to fill the first sealed cavity to make the side section expand and squeeze the head, thereby achieving the purpose of limiting the head.

[0012] Furthermore, the trigger part includes a third sliding cavity formed concavely on the pillow, a third pressure plate sealed and slidingly arranged in the third sliding cavity along the vertical direction, and a third spring arranged in the third sliding cavity and below the third pressure plate along the vertical direction. A third channel connecting the first sealed cavity and the first chamber and a fourth channel formed on the moving bed board and connecting the third sliding cavity and the second sealed cavity are respectively formed on the movable bed board. In a normal state, the third spring extends the top of the third pressure plate upward to the outside of the third sliding cavity and abuts against the bottom surface of the flexible head circumference, thereby being used to inflate the second sealed cavity so that the flexible skull circumference restricts the top of the user's skull to further enhance the limiting effect.

[0013] Furthermore, the trigger part also includes a give-way cavity formed below the movable bed plate opposite to the third sliding cavity and intersecting and connected to the third channel, a connecting rod arranged in the third sliding cavity in the vertical direction and connected to the bottom surface of the third pressure plate at one end, and a piston connected to the other end of the connecting rod. A through hole is opened in the vertical direction between the give-way cavity and the third sliding cavity for the connecting rod to slide through in a sealed manner. The piston is arranged in the give-way cavity in a sealed manner and slides in the vertical direction. When the third spring is in a normal state, the piston blocks the third channel connected to the give-way cavity to realize the opening and closing of the third channel.

[0014] Furthermore, the bottom of the second fixing seat is hinged to the pillow so that the top of the second fixing seat can swing in and out relative to the headrest cavity; the trigger part also includes a deflated adjustment airbag connected to the bottom of the second fixing seat and the pillow respectively, the adjustment airbag is located on the side of the second fixing seat facing away from the headrest cavity and has a hollow third sealed cavity inside, the third sealed cavity is connected to the fourth channel and the second sealed cavity respectively, so that after the user's head presses down the third pressure plate, the adjustment airbag is filled to make the second fixing seat swing toward the side of the user's head and fill the second sealed cavity at the same time, and an exhaust port that can be opened and closed is provided on the adjustment airbag, so that after the detection is completed, the exhaust port can be opened to quickly discharge the air in the adjustment airbag and the second sealed cavity, so that the second fixing seat swings toward the side away from the headrest cavity to facilitate getting up.

[0015] The head and neck fixation device for brain magnetic resonance imaging of the present invention has at least the following beneficial effects: through the cooperation of the head and neck fixation part and the skull fixation part, when the user lies on his back on the bed and rests his head on the headrest cavity, the skin on both sides of the head can be contracted and squeezed, and the headrest cavity surrounded by flexible material can fit along the contour of the part contacted by the head when restricting the head, thereby greatly reducing or even eliminating the user's discomfort; through the cooperation of the air storage part and the trigger part, the fixing effect and stability of the headrest part are further improved to ensure that the user's head is difficult to move during the examination, while improving the comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 is a schematic structural diagram of the head and neck fixation device of the present invention;

[0018] Figure 2 for Figure 1 An enlarged view of portion A is shown;

[0019] Figure 3 is a side partial cross-sectional view of the head and neck fixation device of the present invention;

[0020] Figure 4 for Figure 3 A partial side cross-sectional view of the head and neck restraint device in use;

[0021] Figure 5 It is a partial rear view of the head and neck fixing part of the present invention.

[0022] The meanings of the reference numerals in the accompanying drawings are:

[0023] MRI scanner-1;

[0024] Examination bed-2; base-21; movable bed board-22; bed surface-23; pillow-24; groove-241;

[0025] Head and neck fixing portion 3; first fixing seat 31; flexible head circumference 32; flexible neck circumference 33; first sealed cavity 3a; supporting section 3b; side circumference section 3c;

[0026] Skull top fixing portion-4; second fixing seat-41; flexible skull circumference-42; second sealed cavity-421; protruding section-422;

[0027] Gas storage unit 5; elastic unit 51; first sliding chamber 511; first pressure plate 512; first spring 513; second channel 514; one-way valve 515; first channel 516; gas storage unit 52; second sliding chamber 521; first chamber 5211; second chamber 5212; second pressure plate 522; second spring 523;

[0028] Trigger unit 6; third sliding chamber 61; third pressure plate 62; third spring 63; clearance chamber 64; connecting rod 65; piston 66; regulating airbag 67; third sealing chamber 671; exhaust port 672; third channel 68; fourth channel 69. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] like Figures 1 to 5 As shown, the head and neck fixation device for brain magnetic resonance imaging of the present invention includes an examination bed 2, a head and neck fixation part 3 arranged on the examination bed 2, a skull fixation part 4 arranged on the examination bed 2, an air storage part 5 arranged on the examination bed 2, and a trigger part 6 arranged on the examination bed 2. The examination bed 2 is used for allowing the user or the examinee to lie on its back, the head and neck fixation part 3 limits the placement position of the user's head, and the trigger part 6 is used to control the connection and disconnection between the head and neck fixation part 3 and the air storage part 5 and to control the skull fixation part 4, so that when the user lies on his back on the examination bed 2 with his head resting on the head and neck fixation part 3, the head and neck fixation part 3 limits the head and neck, and the skull fixation part 4 limits the skull part, so as to avoid the head position changing due to external factors or the patient's own limb movements during the examination process, avoid the examiner's head and neck from moving significantly and standing up, ensure the examination of brain magnetic resonance imaging, avoid increasing the examination time due to changes in the head position, avoid inaccurate results, and reduce unnecessary trouble.

[0031] like Figure 1As shown, in this embodiment, the examination bed 2 includes a base 21 located on one side of an MRI scanner 1 and a movable bedplate 22 slidably mounted on the top surface of the base 21 and movable relative to the MRI scanner 1. A slide rail (or slide groove) is provided along the length of the top surface of the base 21, and the slide rail extends into the MRI scanner 1 at one end near the examination housing. The movable bedplate 22 is arranged along the length of the base 21 on the top surface of the base 21, while a slide groove (or slide rail) is provided on the bottom surface of the movable bedplate 22 to slidably engage with the slide rail, allowing the entire movable bedplate 22 to slide relative to the base 21. Furthermore, the bottom surface of the movable bedplate 22 is higher than the bottom surface height of the MRI scanner 1, and the top surface of the movable bedplate 22 is lower than the center point height of the MRI scanner 1, allowing the movable bedplate 22 to slide into the MRI scanner 1. A fully automatic device for pushing the movable bed plate 22 can be provided between the base 21 and the movable bed plate 22. For example, an electric push rod or hydraulic rod structure can be provided on the base 21 along the length of the base 21, and the corresponding output end can be connected to the movable bed plate 22. Alternatively, a linear module can be provided directly between the movable bed plate 22 and the base 21 to achieve the same function. Each device for pushing the movable bed plate 22 and the magnetic resonance scanner 1 are connected and controlled by the same controller. Alternatively, the movable bed plate 22 can be moved by manually pushing the movable bed plate 22. The top surface of the movable bed plate 22 has a bed surface 23, which allows the patient to lie flat on the bed surface 23. When the patient lies flat on the bed surface 23, the patient can be moved into or out of the magnetic resonance scanner 1 along with the movable bed plate 22. It should be noted that the movable bed plate 22, the head and neck fixing portion 3, the skull fixing portion 4, the air storage portion 5, and the trigger portion 6 of the present invention are all non-metallic to avoid affecting the performance of the nuclear magnetic resonance.

[0032] In the context of this embodiment, a bolster 24 is provided on the end of the bed surface 23 facing the MRI scanner 1. Bolster 24 is part of the movable bed plate 22. Bolster 24 allows the patient to quickly determine the proper placement of their head while lying flat on the bed surface 23. This ensures that when the movable bed plate 22 moves to the designated position within the MRI scanner 1 during an MRI examination, the MRI scanner 1 can accurately scan the area to be examined. Bolster 24 is made of a hard material. The placement of bolsters 24 on both ends of the movable bed plate 22 facilitates the patient's ability to position their head or feet toward the MRI scanner 1 as needed.

[0033] like Figures 1 to 5As shown, in this embodiment, the head and neck fixing portion 3 is provided on the pillow 24. When the user places the head on the pillow 24, the head and neck fixing portion 3 can be aligned and fixed. In order to quickly position the head on the head and neck fixing portion 3, a headrest cavity is formed on the head and neck fixing portion 3 for supporting the user's head and neck on the head and neck fixing portion 3. The headrest cavity is surrounded by a flexible material. When the user lies on his back on the bed surface 23, he can directly rest his head on the headrest cavity. The headrest cavity formed by the flexible material increases the comfort of contact, avoids the discomfort caused by hard contact, and can also achieve the effect of fixing the head.

[0034] In the content defined in this embodiment, the head and neck fixing part 3 includes two first fixing seats 31 symmetrically and spaced apart on the pillow 24, a flexible head circumference 32 arranged in an arc shape on the inner side of the first fixing seat 31, and a flexible neck circumference 33 arranged in an arc shape on the inner side of the first fixing seat 31. The flexible head circumference 32 and the flexible neck circumference 33 are parallel and spaced apart along the length direction of the bed surface 23. At the same time, the flexible neck circumference 33 is located on the side close to the bed surface 23 relative to the flexible head circumference 32 and is used to correspond to the user's neck, so as to limit the movement of the neck after the user lies on his back; the flexible head circumference 32 is used to correspond to the user's head, so as to limit the movement of the head after the user lies on his back. In this embodiment, each first fixing seat 31 comprises two arcuate first brackets, which are fixedly connected to the pillow 24. The two first brackets of each first fixing seat 31 are mirror-imaged, with their central portions facing away from each other, or with their central portions facing outward and downward. Each first bracket is made of a rigid material, supporting the flexible neck girdle 33 and the flexible head girdle 32 without interfering with the MRI examination. The flexible head girdle 32 and the flexible neck girdle 33 are both made of a flexible material and have hollow, sealed first cavities 3a within them. The air storage portion 5 is connected to and communicates with each first sealed cavity 3a. The flexible head girdle 32 and the flexible neck girdle 33 can be made of a flexible material such as polyester or polyamide. These materials are not only strong and soft, but also heat-resistant and chemical-resistant. When the user rests their head and neck girdle 32 and the flexible neck girdle 33, the soft material does not cause discomfort. Furthermore, the material is lightweight, easy to fill, and airtight and waterproof. Alternatively, a flexible material with a certain degree of elasticity, such as silicone, can be used. When the user is not lying on their back, the flexible head girth 32 and the flexible neck girth 33 are both in a deflated state, and the first sealed cavity 3a is empty until the gas storage unit 5 fills the first sealed cavity 3a with gas, causing the flexible head girth 32 and the flexible neck girth 33 to expand. The flexible head girth 32 and the flexible neck girth 33 each have a support section 3b located on the pillow 24 for supporting the patient's head, and side girth sections 3c located on the inner side walls of the first fixing seat 31 on both sides and respectively for supporting the patient's head and neck. The side girth sections 3c are also located on both sides of the support section 3b and are interconnected. The headrest cavity is formed by the side girth sections 3c of the flexible head girth 32, the support section 3b of the flexible head girth 32, the side girth sections 3c of the flexible neck girth 33, and the support section 3b of the flexible neck girth 33. When the flexible head girth 32 and the flexible neck girth 33 are both in a deflated state, the entire headrest cavity has its maximum space, and the user can now freely lie on their back within it. The distance between the two first brackets and the two side segments 3c corresponding to the flexible neck circumference 33 is smaller than the distance between the two first brackets corresponding to the flexible head circumference 32, so that the entire headrest cavity is wider in the part corresponding to the head and narrower in the part corresponding to the neck, thereby being set in a targeted manner.It should be noted that the spacing between the flexible head girdle 32 and the flexible neck girdle 33 can also be kept consistent, but the corresponding inflation volume of the first sealed cavity 3a of the flexible neck girdle 33 needs to be increased, and the corresponding size of the flexible neck girdle 33 should also be increased. In this embodiment, the side girdle segments 3c on both sides are convexly arranged toward each other so that they bulge toward each other after inflation to compress the user's head.

[0035] During use, the back of the user's head is partially supported by the supporting section 3b of the flexible headband 32. Due to the air contained within the supporting section 3b, the supporting section 3b is compressed and sinks when supported on the back of the user's head to disperse the force. The force exerted by the supporting section 3b on the back of the head is also dispersed, greatly preventing concentrated pressure on the skin and discomfort. In this embodiment, the supporting section 3b and side sections 3c of the flexible headband 32 and the flexible neckband 33 are both deflated when the first sealed cavity 3a is not connected to the air storage unit 5. This allows the user's head to pass between the opposing side sections 3c until the head presses down on the supporting section 3b, activating the trigger unit 6. Air is then inflated into the first sealed cavity 3a, causing the supporting section 3b and the side sections 3c on both sides to expand, supporting the head and extending toward the sides of the user's head until the side sections 3c contact the head on both sides of the ears, achieving a limiting effect and thus preventing hard contact between the head and the pillow 24. A first electric exhaust valve (or manual exhaust valve) is provided on the flexible headband 32 to exhaust the gas within the first sealed cavity 3a after the user stands up after use. Because the weight of the human torso is much greater than the weight of the head, the force exerted on the support section 3b by the back when lying on the bed is much greater than the force exerted by the head. As a result, the support section 3b can expand to a certain extent after the first sealed cavity 3a is inflated.

[0036] like Figures 1 to 4 As shown, in this embodiment, the skull fixing part 4 is movably arranged on the pillow 24 and is located on the side of the flexible head circumference 32 of the head and neck fixing part 3 away from the bed surface 23, so as to correspond to the skull of the user when the user lies on his back on the bed surface 23.

[0037] In this embodiment, the skull fixation portion 4 comprises a second fixing seat 41 movably mounted on the pillow 24, and a flexible cranial collar 42 arranged in an arc shape on the side of the second fixing seat 41 facing the headrest cavity. The second fixing seat 41 is capable of swinging relative to the headrest cavity. The second fixing seat 41 is supported by a rigid material and has an arc shape. The middle portion of the second fixing seat 41 is convex along the length of the bed surface 23, facing away from the headrest cavity, to avoid the user's skull. This also supports the flexible cranial collar 42, allowing it to restrain the user's skull. In this embodiment, the bottom of the second fixing seat 41 is hinged to the pillow 24, allowing the top of the second fixing seat 41 to swing in and out of the headrest cavity. This hinged connection is achieved by providing a recess 241 on the pillow 24, a rotating shaft disposed transversely along the width of the bed surface 23 within the recess 241, and a corresponding rotation hole at the bottom of the second fixing seat 41, which is rotatably mounted on the rotation shaft. Alternatively, a slide groove may be provided on the pillow 24 along the width direction of the bed surface 23, and the bottom of the second fixing seat 41 may be slidably set in the slide groove, thereby realizing a movable connection between the second fixing seat 41 and the pillow 24. When needed, the second fixing seat 41 can be manually rotated or pushed.

[0038] In this embodiment, the flexible cranial collar 42 is made of a flexible material and has an overall arcuate shape, arranged along the inner sidewall of the second fixing seat 41. The flexible cranial collar 42 defines a hollow, sealed second cavity 421, with the triggering portion 6 connected to and communicating with the second cavity 421. The flexible cranial collar 42 is made of the same material as the flexible head collar 32. When the triggering portion 6 is not triggered, the flexible cranial collar 42 is in a deflated state. When the user's head is positioned within the headrest cavity, the triggering portion 6 inflates the second cavity 421, causing the flexible cranial collar 42 to expand. During use, after the user's head rests on the support section 3b, the second fixing seat 41 is rotated toward the headrest cavity, allowing the flexible cranial collar 42 to rest on the top of the user's skull, thereby preventing the user from rising. In order to better limit the user's skull, the flexible skull girth 42 has a protruding section 422 on the end away from the pillow 24, which is protruding toward the side of the headrest cavity. After the user rests his head on the supporting section 3b, the trigger part 6 inflates the second sealed cavity 421 to expand the protruding section 422 and the flexible skull girth 42. The protruding section 422 protrudes toward the user's forehead relative to the flexible skull girth 42 so as to be able to support the user's skull and forehead.

[0039] like Figure 1 、 Figure 3 and Figure 4As shown, in this embodiment, the air storage portion 5 is arranged on the side of the bed surface 23 close to the pillow 24 to correspond to the user's back. When the user lies on the bed surface 23, the air storage portion 5 is pressed down to store air in the air storage portion 5, so that when the user's head is formed in the headrest cavity, the first sealed cavity 3a is inflated, so that the supporting section 3b and the side section 3c are filled with gas to press the two sides of the head tightly, and the back of the head is separated from the pillow 24 and supported by the supporting section 3b, and the supporting section 3b and the side section 3c made of flexible material will not be hard squeezed against the skin to cause discomfort. In this embodiment, the air storage part 5 includes an elastic part 51 arranged on the movable bed board 22 and protruding from the bed surface 23, and an air storage part 52 respectively connected to the elastic part 51 and the first sealed cavity. When not in use, the top of the elastic part 51 protrudes from the bed surface 23. When the user lies on the bed surface 23 with his back, the elastic part 51 will be pressed down to inflate the air storage part 52. After the air storage part 52 is connected to the first sealed cavity 3a, the stored gas is charged into the first sealed cavity 3a.

[0040] In the content defined in this embodiment, the elastic portion 51 includes a first sliding cavity 511 concavely formed on the bed surface 23, a first pressure plate 512 sealed and slidably arranged in the first sliding cavity 511 along the vertical direction, and a first spring 513 arranged in the first sliding cavity 511 below the first pressure plate 512 along the vertical direction. The first sliding cavity 511 is connected to the gas storage portion 52. When the first pressure plate 512 is not pressurized, the first spring 513 is in a normal state and the top of the first pressure plate 512 is located outside the first sliding cavity 511 and protrudes upward from the bed surface 23; when the user lies on his back on the bed surface 23, the user's back presses down on the first pressure plate 512, so that the first pressure plate 512 presses down the first spring 513, causing the first spring 513 to contract and push the gas in the first sliding cavity 511 into the gas storage portion 52, thereby realizing gas storage. Specifically, a rubber sealing ring may be provided on the outer wall of the first pressure plate 512 to achieve sealed sliding between the first pressure plate 512 and the first sliding cavity 511. The detailed structure can be referred to the structural principle of the piston 66 and syringe of a syringe and will not be described in detail here. A first passage 516 is formed on the movable bed 22, connecting the first sliding cavity 511 and the gas storage portion 52, thereby achieving communication between the first sliding cavity 511 and the gas storage portion 52. In order to facilitate the first spring 513 to rebound and extend quickly when the user stands up, and to avoid the problem of gas consumption in the first sealed chamber 3a due to the transportation of various channels after the user stands up, which may cause the first pressure plate 512 to be unable to return to its original position and the top not to extend out of the first sliding chamber 511, a second channel 514 is provided on the movable bed board 22 to connect the outside of the movable bed board 22 and the first sliding chamber 511. A one-way valve 515 is provided in the second channel 514 to only allow external air to enter the first sliding chamber 511, so that the gas in the first sliding chamber 511 cannot leak through the one-way valve 515. After the user stands up, the first sliding chamber 511 absorbs external air through the second channel 514 when the first spring 513 rebounds and extends, pushing the first pressure plate 512 upward to slide, so that the second spring 523 can rebound quickly and the first sliding chamber 511 can be quickly filled, ensuring the next inspection.

[0041] In the content defined in this embodiment, the gas storage part 52 includes a second sliding cavity 521 formed on the movable bed board 22, a second pressure plate 522 sealed and slidingly arranged in the second sliding cavity 521, and a second spring 523 arranged in the second sliding cavity 521 along the sliding direction of the second pressure plate 522. The second spring 523 is used to press against the second pressure plate 522. When the second pressure plate 522 cooperates with the first spring 513 on the first pressure plate 512 to squeeze the gas in the first sliding cavity 511 and the trigger part 6 is not triggered, the gas is pushed into the second sliding cavity 521 and squeezes the second pressure plate 522, so that the second spring 523 is compressed and a certain amount of gas is stored in the second sliding cavity 521. After the trigger part 6 connects the first sealed cavity 3a and the gas storage part 52, the gas stored in the first sliding cavity 511 is filled into the first sealed cavity 3a, and the supporting sections 3b and the side sections 3c expand and fit against the user's head. The second pressure plate 522 is made of a hard material and has a sealing ring on its surface, ensuring a sealed sliding connection between the second pressure plate 522 and the second sliding chamber 521. The second pressure plate 522 divides the second sliding chamber 521 into a first chamber 5211 connected to the first channel 516 and a second chamber 5212 connected to the outside of the movable bed 22. The first chamber 5211 also connects to the first sealed chamber 3a, allowing gas pushed by the first pressure plate 512 to be stored in the first chamber 5211 through the first channel 516 and to be filled into the first sealed chamber 3a. The second chamber 5212 connects to the outside of the movable bed 22, allowing the volume of the second chamber 5212 to be compressed or expanded normally, ensuring that the first chamber 5211 can properly store or transport gas. A second spring 523 is located within the second chamber 5212 and is arranged along the sliding direction of the second pressure plate 522. The two ends of the second spring 523 abut the second pressure plate 522 and the second sliding chamber 521 on the side away from the first chamber 5211.

[0042] like Figure 3 and Figure 4As shown, in this embodiment, the trigger part 6 is arranged on the pillow 24 and is connected to the second fixing seat 41 and the flexible skull circumference 42. The trigger part 6 is used to cut off the connection between the first chamber 5211 and the first sealed cavity 3a when the user's head is not resting on the pillow 24, so that the gas pushed in the first pressure plate 512 is stored in the first chamber 5211 by squeezing the second pressure plate 522; the trigger part 6 connects the first chamber 5211 and the first sealed cavity 3a when the user's head is resting in the headrest cavity, so that the second After the second spring 523 rebounds and stretches, the pressure plate 522 pushes the second pressure plate 522, reducing the volume of the first chamber 5211. This inflates the gas in the first chamber 5211 into the first sealed cavity 3a, causing the supporting segments 3b and side segments 3c of the flexible head and neck circumferences 32 and 33 to expand. This shrinks the headrest cavity from both sides of the user and flexibly supports both sides of the head and neck. The side segments 3c restrict lateral movement of the head. After expansion, the supporting segments 3b and side segments 3c eliminate hard contact with the head, preventing discomfort. Furthermore, when the user's head rests in the headrest cavity, the trigger unit 6 drives the second fixing seat 41 to swing toward the side of the headrest cavity and inflate the second sealed cavity 421. This causes the flexible cranial circumference 42 to rest against the top of the user's skull, and the protruding segments 422 to rest against the user's forehead, thereby restricting the user from rising to a certain extent and achieving vertical positioning.

[0043] In the content defined in this embodiment, the trigger part 6 includes a third sliding cavity 61 formed concave on the pillow 24, a third pressure plate 62 sealed and slidably arranged in the third sliding cavity 61 along the vertical direction, a third spring 63 arranged in the third sliding cavity 61 below the third pressure plate 62 along the vertical direction, a yield cavity 64 formed on the movable bed board 22 directly below the third sliding cavity 61 and intersecting and connected to the third channel 68, a connecting rod 65 arranged in the third sliding cavity 61 along the vertical direction and one end of which is connected to the bottom surface of the third pressure plate 62, a piston 66 connected to the other end of the connecting rod 65, and an adjustment airbag 67 respectively connected to the bottom of the second fixed seat 41 and the pillow 24. When the user's head is resting in the headrest cavity, the third pressure plate 62, the third spring 63 and the third sliding cavity 61 cooperate to push the gas in the third sliding cavity 61 toward the adjustment airbag 67 and the second sealed cavity 421. The adjustment airbag 67 causes the second fixed seat 41 to rotate from away from the headrest cavity to the side toward the headrest cavity. The second fixing seat 41 is provided with support for the second fixing seat 41, and the second fixing seat 41 and the adjustable airbag 67 are provided with support for the second fixing seat 41, so that the second fixing seat 41 and the adjustable airbag 67 can maintain the position against the top of the head. At the same time, the adjustable airbag 67 also plays a certain cushioning role when the user quickly stands up to restrain his head, thereby preventing the head from being bumped and injured. The yield cavity 64, the connecting rod 65 and the piston 66 cooperate with each other to block the communication between the first chamber 5211 and the first sealed chamber 3a when the user's head is not resting in the headrest cavity, and when the user's head is resting in the headrest cavity, the third pressure plate 62 is pressed down to connect the first chamber 5211 with the first sealed chamber 3a, thereby realizing on / off control between the first chamber 5211 and the first sealed chamber 3a, so that the supporting section 3b and the side section 3c start to inflate to fix the user's head only after the user's head is in place. It should be noted that the first pressure plate 512 is adapted to the cross section of the first sliding cavity 511 , the second pressure plate 522 is adapted to the cross section of the second sliding cavity 521 , and the third pressure plate 62 is adapted to the cross section of the third sliding cavity 61 to achieve sealed sliding fit.

[0044] In the context of this embodiment, the third sliding cavity 61 is located directly below the support section 3b of the flexible head circumference 32. A third channel 68 connecting the first sealed cavity 3a and the first chamber 5211, and a fourth channel 69 connecting the third sliding cavity 61 and the second sealed cavity 421 are formed on the movable bed plate 22. The inner cavity of the regulating airbag 67 is connected to the second sealed cavity 421 and the fourth channel 69, respectively, thereby achieving communication between the third sliding cavity 61, the fourth channel 69, the regulating airbag 67, and the second sealed cavity 421. The third pressure plate 62 is made of a hard material and has a sealing ring on its surface to ensure a sealed sliding fit between the third sliding cavity 61 and the third pressure plate 62 in the vertical direction. A third spring 63 is arranged along the sliding direction of the third pressure plate 62 and located directly below the third pressure plate 62. The ends of the third spring 63 abut the third pressure plate 62 and the bottom wall of the third sliding cavity 61, respectively. When the user's head is not resting on the headrest cavity and is in an unused state, the third spring 63 is in a normal state. At this time, the top of the third pressure plate 62 extends upward to the outside of the third sliding cavity 61 under the support of the third spring 63 and rests on the bottom surface of the flexible head circumference 32. Since the flexible head circumference 32 is supported by a flexible material, it can be stretched and deformed. Therefore, when the third pressure plate 62 squeezes the bottom of the flexible head circumference 32, the third pressure plate 62 can protrude upward from the third sliding cavity 61. When the user's head is resting on the headrest cavity, the head is supported on the supporting section 3b and the third pressure plate 62 is squeezed at the same time, so that the third pressure plate 62 moves downward and compresses the third spring 63, so that the gas in the third sliding cavity 61 is transported to the regulating airbag 67 and the second sealing cavity 421 through the fourth channel 69.

[0045] In the content defined in this embodiment, the give way cavity 64 is opened on the movable bed plate 22 in the vertical direction and is located directly below the third sliding cavity 61. The third channel 68 intersects with the give way cavity 64 in a radial direction and is connected to the give way cavity 64, so that the third channel 68 is disconnected from the middle by the give way cavity 64 and the two ends of the third channel 68 are connected by the give way cavity 64. The bottom of the give way cavity 64 extends below the third channel 68. A through hole is opened in the vertical direction between the give way cavity 64 and the third sliding cavity 61 for the connecting rod 65 to slide through in a sealed manner. The through hole is located at the center of the third sliding cavity 61. A sealing ring is provided in the through hole, and the connecting rod 65 is adapted to the through hole and one end slides through the through hole in a sealed manner. The other end of the connecting rod 65 is fixedly connected to the bottom surface of the third pressure plate 62 in the vertical direction. The piston 66 is sealed and slidably arranged in the give way cavity 64 in the vertical direction and has a thickness greater than the diameter of the third channel 68. The lateral dimension (length and / or width) of the give way cavity 64 is greater than the diameter of the third channel 68. When the third spring 63 is in a normal state, the piston 66 is located at the top of the give way cavity 64 and blocks the third channel 68 connected to the give way cavity 64. At this time, the two ends of the third channel 68 are no longer connected, and the air storage part 52 can be used to store air; when the user's head is resting in the headrest cavity and pressing down the third pressure plate 62 until it is in place, the third pressure plate 62 drives the connecting rod 65 and the piston 66 to slide downward, so that the piston 66 no longer blocks the third channel 68, and the gas in the air storage cavity can be filled into the first sealed cavity 3a, thereby realizing the control of the filling timing of each first sealed cavity 3a.

[0046] In the context of this embodiment, the adjustable airbag 67 is located on the side of the second fixing seat 41 facing away from the headrest cavity and has a hollow third sealed cavity 671 therein. The third sealed cavity 671 is connected to the fourth channel 69 and the second sealed cavity 421, respectively, so that the movement of the third pressure plate 62 synchronously controls the contraction of the adjustable airbag 67 and the flexible cranial circumference 42. Similarly, during the downward movement of the user's head, air is inflated into the third sealed cavity 671. Once the user's head is in place, the second fixing seat 41 rotates to a suitable angle, and the protruding section 422 is finally inflated to rest against the user's forehead. Preferably, the adjustable airbag 67 is provided with an openable and closable exhaust port 672 or an electric exhaust valve. This can be achieved by screwing and snapping a cover onto the exhaust port 672. After the MRI examination is completed, the exhaust port 672 can be opened to quickly exhaust the air in the third sealed cavity 671 and the second sealed cavity 421, allowing the second fixing seat 41 to rotate away from the headrest cavity without hindering the user from getting up. The second fixing seat 41 can be manually rotated away from the headrest cavity, or a fourth spring can be provided in the third sealing cavity 671 to realize automatic rebound to pull the second fixing seat 41 away from the headrest cavity.

[0047] It should be noted that the mutual connectivity between the flexible head circumference 32, the flexible neck circumference 33, the flexible skull circumference 42 and the adjustment airbag 67 or the connectivity with other structures or channels can be achieved by connecting them through a hose made of silicone. The outer periphery of the end of the hose is sealed and connected to the corresponding flexible head circumference 32 or flexible neck circumference 33 or flexible skull circumference 42 or adjustment airbag 67 and connected to their inner cavity to achieve connectivity.

[0048] The working method of one embodiment of the head and neck fixation device for brain magnetic resonance imaging of the present invention is as follows: when the device is not in use, the first spring 513, the second spring 523 and the third spring 63 are all in a normal state, the first pressure plate 512 and the third pressure plate 62 are both protruding upward, the second pressure plate 522 makes the volume of the first chamber 5211 smaller than that of the second chamber 5212, and the piston 66 blocks the third channel 68. The flexible head circumference 32, the flexible neck circumference 33, the adjustment airbag 67 and the flexible skull circumference 42 are all in a deflated state. When the user lies on his back on the bed surface 23, first, the back of the user will lie on the bed surface 23 before the head. In this process, the first pressure plate 512 is pressed down to compress the first spring 513 and inflate the first chamber 5211 through the first channel 516. The gas squeezes the second pressure plate 522 to compress the second spring 523. The first chamber 5211 increases and the second chamber The volume of 5212 decreases. When the user's head is resting on the headrest cavity, the head gradually presses down the third pressure plate 62, causing the third spring 63 to contract. The third pressure plate 62 pushes the gas in the third sliding cavity 61 through the fourth channel 69 to the third sealed cavity 671 and the second sealed cavity 421, thereby expanding the adjustment airbag 67 and driving the second fixing seat 41 to rotate toward one side of the headrest cavity. After the second fixing seat 41 is rotated, it continues to inflate the second sealed cavity 421 until the user's head is in place and the protruding section 422 restricts the user's forehead; at the same time, the third pressure plate 62 moves downward, driving the connecting rod 65 to move the piston 66 downward and connect to the third channel 68. The second spring 523 rebounds and resets to enable the second pressure plate 522 to push the gas in the first chamber 5211 to fill the first sealed cavity 3a, so that the supporting section 3b supports the head and neck, and the side section 3c restricts the head and neck, so as to complete the fixation of the head and neck.

[0049] After use, the exhaust port 672 is opened to release the gas in the third sealed chamber 671 and the second sealed chamber 421, so that the second fixed seat 41, the adjustment airbag 67 and the flexible skull circumference 42 are reset. After the user stands up, the third spring 63 rebounds and resets to reset the third pressure plate 62 and fill the third sliding chamber 61. Then the first spring 513 rebounds and resets and fills the first sliding chamber 511 through the second channel 514. In this process, the piston 66 moves upward with the third pressure plate 62 and will not immediately block the third channel 68. In this process, the gas in the first sealed chamber 3a is discharged through the electric exhaust valve. Finally, all parts are reset to prepare for the next user to check.

Claims

1. A head and neck fixation device for brain magnetic resonance imaging, characterized in that: include: An examination bed, comprising a base and a movable bed plate slidably mounted on the top surface of the base and movable along its length, the top surface of the movable bed plate having a bed surface for a patient to lie flat on, and a pillow disposed on one end of the bed surface; A head and neck fixing portion is provided on the pillow, wherein a headrest cavity enclosed by a flexible material for supporting the head and neck of a user is formed on the head and neck fixing portion; The head and neck fixing portion includes two first fixing seats symmetrically and spaced apart on the pillow, and a flexible head circumference and a flexible neck circumference arranged in an arc shape on the inner sides of the first fixing seats and spaced apart along the length direction of the bed surface. The flexible head circumference and the flexible neck circumference are both made of flexible material and have a hollow and sealed first sealing cavity inside. a skull fixing portion, movably arranged on the pillow and located on a side of the head and neck fixing portion away from the bed surface; The skull fixing portion includes a second fixing seat movably arranged on the pillow and a flexible skull collar arranged in an arc shape on the side of the second fixing seat facing the headrest cavity, the second fixing seat being able to swing relative to the headrest cavity, and the flexible skull collar being made of a flexible material and having a hollow and sealed second sealed cavity inside; an air storage portion, disposed on a side of the bed surface close to the pillow to correspond to the back of the user, the air storage portion being connected and coordinated with the head and neck fixing portion to store air when the user lies on the bed surface, the air storage portion being connected and in communication with each of the first sealed cavities; The air storage part includes an elastic part provided on the movable bed board and capable of protruding from the bed surface, and an air storage part respectively connected to the elastic part and the first sealed cavity, wherein the elastic part inflates the air storage part when the user lies on the bed surface with his back; The elastic portion includes a first sliding cavity formed concavely on the bed surface, a first pressure plate vertically and sealingly slidingly disposed in the first sliding cavity, and a first spring vertically disposed in the first sliding cavity below the first pressure plate. A first passage connecting the first sliding cavity and the air storage portion is formed on the movable bed surface. The first spring, in a normal state, causes the top of the first pressure plate to extend upwardly out of the first sliding cavity. The air storage portion includes a second sliding cavity formed on the movable bed plate, a second pressure plate sealed and slidingly arranged in the second sliding cavity, and a second spring arranged in the second sliding cavity along the sliding direction of the second pressure plate, the second pressure plate divides the second sliding cavity into a first cavity connected to the first channel and a second cavity connected to the outside of the movable bed plate, the first cavity is connected to the first sealed cavity; the second spring is located in the second cavity, and its two ends respectively abut against the second pressure plate and the second sliding cavity; and a trigger portion, disposed on the pillow and connected to and cooperating with the skull fixing portion, and configured to cut off the connection between the air storage portion and the head and neck fixing portion when not in use, and to connect the air storage portion and the head and neck fixing portion when the user's head rests in the headrest cavity, thereby shrinking the headrest cavity from both sides of the user and flexibly supporting the head and neck. Furthermore, the trigger portion is configured to drive the skull fixing portion to move so as to flexibly press against the skull of the user when the head rests in the headrest cavity, and the trigger portion is connected to and communicates with the second sealed cavity; The trigger portion includes a third sliding cavity formed concavely on the pillow, a third pressure plate provided in the third sliding cavity for sealing and sliding in a vertical direction, and a third spring provided in the third sliding cavity and below the third pressure plate in a vertical direction. A third passage connecting the first sealed cavity and the first chamber and a fourth passage formed on the movable bed plate and connecting the third sliding cavity and the second sealed cavity are respectively formed on the movable bed plate. In a normal state, the third spring causes the top of the third pressure plate to extend upwardly out of the third sliding cavity and abut against the bottom surface of the flexible head circumference. The triggering portion further includes a clearance cavity formed below the movable bed plate opposite to the third sliding cavity and intersecting and communicating with the third passage, a connecting rod vertically disposed in the third sliding cavity and having one end connected to the bottom surface of the third pressure plate, and a piston connected to the other end of the connecting rod. A through hole for sealingly sliding through the connecting rod is vertically provided between the clearance cavity and the third sliding cavity. The piston is vertically sealed and slidably disposed in the clearance cavity. When the third spring is in a normal state, the piston blocks the third passage communicating with the clearance cavity. The trigger part also includes an adjustment airbag connected to the bottom of the second fixing seat and the pillow respectively. The adjustment airbag is located on the side of the second fixing seat facing away from the headrest cavity and has a hollow third sealed cavity inside. The third sealed cavity is connected to the fourth channel and the second sealed cavity respectively.

2. The head and neck fixation device for brain MRI according to claim 1, wherein: The flexible head circumference and the flexible neck circumference both have a supporting section located on the pillow for supporting the patient's head, and side circumference sections located on the inner side walls of the first fixed seats on both sides and respectively used to support the patient's head and neck. The headrest cavity is formed by the side circumference sections and the supporting section, and one of the supporting section and the side circumference section is in a deflated shape.

3. The head and neck fixation device for brain MRI according to claim 1, wherein: The movable bed plate is provided with a second passage communicating with the outside of the movable bed plate and the first sliding cavity, and a one-way valve for allowing external air to enter the second passage is provided in the second passage.

4. The head and neck fixation device for brain MRI according to claim 1, wherein: The bottom of the second fixing seat is hinged to the pillow so that the top of the second fixing seat can swing in and out of the headrest cavity; an exhaust port that can be opened and closed is provided on the regulating airbag.

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