A vertical patient bed and magnetic resonance imaging device

Abstract

This application discloses a vertical patient bed and an MRI imaging device. The vertical patient bed includes a guide, a bed assembly, and a traction drive mechanism. The guide has a guide portion arranged vertically. In the bed assembly, the bed board body is slidably mounted vertically on the guide portion, a constraint member is disposed on the bed board body, and the traction drive mechanism is connected to the bed board body. In this application, the traction drive mechanism can pull the bed board body vertically to move the patient to the imaging space of the MRI imaging device for MRI detection. During the vertical movement of the patient with the bed board body, the bed board body provides support for the patient, improving the patient's positional stability during vertical movement. The cooperation between the constraint member and the bed board body effectively restricts the patient's voluntary movements during imaging, further improving the patient's positional stability and ensuring imaging quality.

Description

Technical Field

[0001] This application relates to magnetic resonance imaging equipment, and more particularly to a vertical patient bed and a magnetic resonance imaging device. Background Technology

[0002] In the field of medical imaging diagnosis, magnetic resonance imaging (MRI) technology has become an important diagnostic tool due to its high resolution and non-invasive nature. Traditional horizontal MRI devices typically use horizontally arranged magnet units, allowing observation of tissue structures while the patient is lying down. However, horizontal MRI devices cannot reflect the tissue conditions when the patient is standing or bearing weight, which may lead to inaccurate diagnoses of certain diseases. In such cases, vertical MRI devices are extremely helpful in patient diagnosis.

[0003] Most patient beds on the market are designed for horizontal MRI scanners, and their structure, function, and stability are not entirely suitable for vertical MRI scanners. Existing vertical MRI scanners often use a vertically adjustable support platform to move the patient to the center of the magnet for imaging. This vertical movement of the support platform directly affects the patient's postural stability. Psychological factors (such as tension or discomfort) and physiological factors (such as muscle fatigue, decreased balance, etc.) can cause patients to make voluntary movements, making it difficult for them to maintain a stable posture during the examination. These factors significantly impact the quality of MRI imaging. Summary of the Invention

[0004] This application provides a standing patient bed and an MRI imaging device, which can solve the technical problem that standing MRI imaging devices are unable to effectively maintain the patient's positional stability, resulting in poor MRI imaging quality.

[0005] In a first aspect, embodiments of this application provide a vertical patient bed for an MRI imaging device. The vertical patient bed includes a guide, a bed assembly, and a traction drive mechanism. The guide is mounted on a support and has a guide portion arranged in a vertical direction. The bed assembly includes a bed board body and a constraint member. The bed board body is used for a standing patient to lean against and is slidably mounted on the guide portion in a vertical direction. The constraint member is disposed on the bed board body and is used to restrict the patient's range of motion. The traction drive mechanism is connected to the bed board body and is used to pull the bed board body to move in a vertical direction to move the patient to the imaging space of the MRI imaging device for MRI detection.

[0006] In some embodiments, the upright patient bed further includes multiple sets of sliding limiting components, which are connected to both the guide and the bed body assembly and are spaced apart along the vertical direction; the average spacing between the multiple sets of sliding limiting components in the vertical direction is P0, and the traction drive mechanism pulls the bed board body to move vertically at a speed of V. min Among them, P0 and V min Satisfies: 0.5 ≤ P0 / V min ≤4.

[0007] In some embodiments, the bed board body has a central support area for the patient to lean against; in the vertical direction, the length of the bed board body is L, and the length of the central support area is X. m The distance between two adjacent sets of sliding limiting components in the vertical direction is P. i The number of sliding limiting components is N, wherein the upright patient bed satisfies at least one of the following conditions; (1) 0≤|P i -P0|≤1 / 3 P0; (2) 0.1L≤P i ≤0.5L; (3) N=X m / P0.

[0008] In some embodiments, the sliding limiting assembly includes a first mating part and a second mating part, the first mating part being connected to the bed board body and the second mating part being connected to the guide part; wherein, the first mating parts of n sets of the sliding limiting assembly can slide and engage with the second mating parts, so that the bed board body can be slidably installed on the guide part in the vertical direction, and n satisfies: n≥1 / 4N.

[0009] In some embodiments, the bed board body has a head safety area, a middle support area, and a foot safety area arranged sequentially in a vertical direction, wherein the middle support area is for the patient to lean against; in the vertical direction, the length of the bed board body is L, the length of the head safety area is X1, the length of the foot safety area is X2, and the length of the middle support area is X... m The traction drive mechanism pulls the guide part to move vertically at a speed of V. min The upright patient bed meets at least one of the following conditions; (1) X1 = Max {0.01V min +5, 25}; (2) X2 = Max {0.01V min +5, 25}; (3) 0.7L≤X m ≤0.9L.

[0010] In some embodiments, the bed assembly has a support surface for the patient to stand on with both feet; the bed assembly has a center of gravity of the bed, which is M away from the support surface in the vertical direction, and the length of the bed board body is L, wherein M and L satisfy: 1 / 4 ≤ M / L ≤ 1 / 2.

[0011] In some embodiments, the bed assembly includes a base plate and a counterweight. The base plate is disposed at the bottom of the bed board body and has the bearing surface. The counterweight is mounted on the base plate and is used to adjust the distance M between the center of gravity of the bed assembly and the bearing surface in the vertical direction.

[0012] In some embodiments, the traction drive mechanism includes a traction rope and a first drive assembly. The traction rope is connected to the bed board body, and the first drive assembly is connected to the traction rope and is used to adjust the length of the traction rope in the vertical direction to traction the bed board body to move in the vertical direction. The bed assembly includes a first limiting portion mounted on at least one of the bed board bodies. The first limiting portion has a first limiting space for the traction rope to pass through, thereby constraining the portion of the traction rope connected to the bed board body to move along the vertical direction.

[0013] In some embodiments, the bed assembly has a bed center of gravity, and in the vertical direction, the minimum distance between the first limiting portion and the bed center of gravity is m0, and the length of the bed board body is L, wherein m0 and L satisfy: 0.05L≤m0≤0.3L.

[0014] In some embodiments, the bed board body has a head edge adjacent to the patient's head; the bed assembly includes a first limiting portion, in the vertical direction, the distance of the first limiting portion from the head edge is m1, m1 and L satisfy: 0.2L≤m1≤0.3L; or, the bed assembly includes a plurality of first limiting portions, in the vertical direction, the distance of the first limiting portion at the highest point from the head edge is m2, m2 and L satisfy: 0≤m2≤0.3L.

[0015] In some embodiments, the traction drive mechanism further includes a safety rope and a second drive assembly, one end of the safety rope being connected to the bed board body and the other end being connected to the second drive assembly; the bed assembly includes a second limiting portion mounted on at least one of the bed board bodies, the second limiting portion having a second limiting space for the safety rope to pass through, so as to constrain the portion of the safety rope connected to the bed board body to move in the vertical direction.

[0016] In some embodiments, the restraints include an underarm support, a movable restraint strap, and a fixed restraint strap. The underarm support is slidably mounted on the upper region of the bed board body for the patient's armpit to rest against. The movable restraint strap is slidably mounted on the bed board body for restraining the patient's body. The fixed restraint strap is fixedly mounted on the lower region of the bed board body for restraining the patient's legs.

[0017] Secondly, embodiments of this application provide an MRI imaging device, including a magnet unit and a vertical patient bed as described above. The magnet unit has a vertically connected imaging space. The traction drive mechanism of the vertical patient bed is used to pull the bed board body to move vertically, so as to move the patient to the imaging space for MRI detection.

[0018] In some embodiments, the magnet unit has an inner wall surface for defining the imaging space, the distance between the bed board body and the inner wall surface of the magnet is A1, and the length of the bed board body in the vertical direction is L, wherein A1 and L satisfy: 5mm + L × sin(0.5°) ≤ A1 ≤ 20mm; the inner diameter of the magnet unit is D1, and the bed board body has a support space for accommodating the patient, the depth of the support space in the thickness direction of the bed board body is H1, and H1 and D1 satisfy: 0.1D1 ≤ H1 ≤ 0.4D1.

[0019] According to an embodiment of this application, a vertical patient bed and an MRI imaging device are provided. The bed assembly and the guide are slidably connected to ensure the smooth lifting and lowering of the bed assembly. The bed board body is slidably mounted on the guide in the vertical direction and can move stably and accurately in the vertical direction under the drive of the traction drive mechanism. When the patient moves vertically with the bed assembly and enters the imaging space of the MRI imaging device, the bed board body can provide support for the patient, improving the patient's positional stability during vertical lifting and lowering and preventing the patient from swaying or even tipping over due to unstable position. The constraint member set on the bed board body can restrict the patient's range of motion. The cooperation between the constraint member and the bed board body effectively restricts the patient's autonomous movements during imaging, further improving the patient's positional stability and ensuring imaging quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a standing patient bed according to one embodiment of this application; Figure 2 This is a top view schematic diagram of the guide member and bed body assembly in one embodiment of this application. Figure 3 This is a schematic diagram illustrating the use of a constraint element according to one embodiment of this application; Figure 4 This is a front view schematic diagram of a bed assembly according to an embodiment of this application; Figure 5 This is an enlarged schematic diagram of a sliding limiting component according to an embodiment of this application; Figure 6 This is a schematic diagram of a traction drive mechanism according to one embodiment of this application; Figure 7 This is a schematic diagram of an nuclear magnetic resonance imaging device according to an embodiment of this application; Figure 8 This is a schematic diagram showing the relative position of the magnet unit and the upright patient bed according to one embodiment of this application; Figure label: 10. Standing patient bed; 20. Magnetic resonance imaging device; 11. Guide component; 12. Bed assembly; 13. Traction drive mechanism; 14. Sliding limit assembly; 15. Buffer assembly; 21. Magnet unit; 111. Connecting part; 112. Guiding part; 1121. T-shaped guide section; 121. Bed board body; 122. Bottom support plate; 123. Counterweight; 124. Restraint; 125. Guard plate; 126. Locking device; 127. First limiting part; 128. Second limiting part; 1210. Head edge; 1211. Head safety area; 1212. Central support area; 1213. Foot safety area; 1214. Sliding part; 1215. Sliding groove; 1216. Restraint track; 1241. Underarm support; 1242. Movable restraint strap; 1243. Fixed restraint strap; 131. Towing rope; 132. First drive assembly; 133. Safety rope; 134. Second drive assembly; 141. First Coordination Unit; 142. Second Coordination Unit; 1411, First pulley; 1412, Second pulley; 1421, First slide rail; 1422, Second slide rail; 210. Imaging space. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] In traditional horizontal MRI scanners, the magnet unit is placed horizontally to generate a stable magnetic field, providing the necessary magnetic field environment for MRI imaging. The patient bed supports and moves the patient, allowing them to enter the magnet unit for scanning. During the examination, the patient lies supine on the bed and is transported to the center of the magnet unit. The operator sends commands to the spectrometer from outside the field. The spectrometer generates pulse signals, which are amplified and transmitted to the gradient coil to generate a gradient field for localization and selection of the imaging plane. Proton resonance in the examined area generates signals, which are acquired and processed by the receiving coil to form an image. However, because the pressure distribution of internal tissues and organs differs between standing and lying positions, vertical MRI scanners can more accurately reflect the body structure and internal organ status of a patient in a standing posture, meeting specific diagnostic needs, compared to horizontal MRI scanners.

[0024] Most patient beds on the market are designed for horizontal MRI scanners. Horizontal beds make it easier to immobilize the patient's limbs while lying flat, and movement is primarily controlled by friction. Vertical beds, however, must consider the weight of the equipment, the patient's weight, and the stability of lifting. Therefore, it's impossible to simply modify a horizontal patient bed for a vertical MRI scanner. Existing vertical MRI scanners use a lifting support platform to transport the patient to the center of the magnet, but this method suffers from insufficient restraint and poor lifting stability. The patient's own movements, as well as psychological and physiological factors, can affect the patient's positional stability, thus impacting image quality. Furthermore, the travel distance of the lifting support platform is limited by the magnetic field.

[0025] To address the technical problem of poor MRI image quality caused by the inability of upright MRI devices to effectively maintain patient positional stability, this application proposes an upright patient bed and an MRI device. In this embodiment, the upright patient bed is equipped with a bed board body that can move vertically, and the bed board body is provided with restraints. During MRI detection, the bed board body provides support for the patient, improving the patient's positional stability during vertical movement and preventing swaying or even tipping due to instability. The restraints limit the patient's range of motion. The cooperation between the restraints and the bed board body effectively restricts the patient's voluntary movements during imaging, further improving the patient's positional stability and ensuring image quality.

[0026] Please see Figure 1 , Figure 1This is a schematic diagram of an upright patient bed 10 according to one embodiment of this application. The upright patient bed 10 includes a guide member 11, a bed assembly 12, and a traction drive mechanism 13. The upright patient bed 10 is used with an MRI imaging device 20, which includes a magnet unit 21 having an imaging space 210. The guide member 11 is mounted on a support member, and the bed assembly 12 is slidably connected to the guide member 11. The bed assembly 12 provides support for a standing patient and helps restrain the patient. The traction drive mechanism 13 is connected to the bed assembly 12 and is used to traction the bed assembly 12 for vertical movement.

[0027] See Figure 2 , Figure 2 This is a top view schematic diagram of the guide member 11 and the bed assembly 12 in one embodiment of this application. In this embodiment, the guide member 11 includes a connecting part 111 and a guide part 112.

[0028] Specifically, the connecting part 111 is a vertically arranged plate-like structure, and is fixedly installed on the support member. In this embodiment, the support member can be a wall or the inner wall surface of the magnet unit 21, depending on the overall layout and installation environment of the MRI imaging device 20. The connecting part 111 allows the guide member 11 to be stably fixed to the support member, providing reliable support for subsequent lifting operations. As a preferred option, the connecting part 111 can be an arc-shaped plate. The structure of the arc-shaped plate can reduce stress concentration, prevent the guide member 11 from breaking under load, and improve the service life of the guide member 11. It is understood that the connecting part 111 can also be a flat plate with reinforcing ribs. The reinforcing ribs can increase the strength and rigidity of the flat plate, enabling it to maintain good stability when subjected to large loads. This structure is also beneficial to improving the overall performance and service life of the guide member 11.

[0029] Furthermore, the guide portion 112 is provided at both ends of the connecting portion 111 and is arranged in a vertical direction. The guide portion 112 forms a stable vertical track, providing guidance for the lifting and lowering of the bed assembly 12.

[0030] See Figures 2-4 , Figure 3 This is a schematic diagram illustrating the use of the constraint member 124 according to one embodiment of this application. Figure 4 This is a front view schematic diagram of a bed frame assembly 12 according to an embodiment of the present application. In this embodiment, the bed frame assembly 12 includes a bed board body 121, a bottom support plate 122, a counterweight part 123, a restraint member 124, and a guard plate 125.

[0031] Furthermore, the bed board body 121 is slidably mounted on the guide portion 112 in a vertical direction for support by a standing patient. Specifically, the bed board body 121 includes a head safety area 1211, a middle support area 1212, and a foot safety area 1213 arranged sequentially in a vertical direction. In the vertical direction, the length of the bed board body 121 is L, and the traction drive mechanism 13 pulls the bed board body 121 in a vertical direction at a speed of V. min ,exist Figure 3 As can be seen, in the vertical direction, the length of the aforementioned head safety area 1211 is X1, and the length of the central support area 1212 is X... m The length of the foot safety area 1213 is X2.

[0032] In one embodiment, the length X1 of the head safety region 1211 satisfies: X1 = Max {0.01V} min +5, 25}.

[0033] In one embodiment, the length X2 of the foot safety area 1213 satisfies: X2 = Max {0.01V} min +5, 25}.

[0034] In one embodiment, the length X of the central bearing region 1212 is... m Satisfy: 0.7L≤X m ≤0.9L.

[0035] It should be noted that during the vertical movement of the bed board body 121, the head safety area 1211 and foot safety area 1213 at both ends are more susceptible to vibration, impact, etc. Therefore, in this embodiment, the sliding limit component 14 is located in the middle support area 1212. In specific implementation, it can be considered that the speed of the bed board body 121 moving vertically is V. min The lengths of the head safety area 1211 and the foot safety area 1213 are set accordingly. It is understood that, in order to enhance the stability of the bed board body 121 and reduce edge effects, the lengths of both the head safety area 1211 and the foot safety area 1213 are not less than 25mm.

[0036] Furthermore, in this embodiment, the length X1 of the head safety region 1211 and the length X2 of the foot safety region 1213 can be the same or different. It should be noted that the length and thickness of each component in this embodiment are measured in millimeters.

[0037] It should be noted that the upright patient bed 10 in this embodiment further includes multiple sets of sliding limiting components 14, which are spaced apart along the vertical direction. In this embodiment, the sliding limiting components 14 are connected to both the guide member 11 and the bed body assembly 12, and are disposed between the guide member 11 and the bed body assembly 12. The sliding limiting components 14 allow the guide member 11 and the bed body assembly 12 to slide relative to each other, and restrict their relative movement in the horizontal direction.

[0038] To ensure smooth operation, the average spacing and number of multiple sliding limit components 14 in the vertical direction in this embodiment depend on the lifting speed of the bed board body 121 and its length.

[0039] The average vertical spacing of the multiple sets of sliding limit components 14 is P0, and the traction drive mechanism 13 moves the bed plate body 121 at a speed of V in the vertical direction. min Among them, P0 and V min Satisfies: 0.5V min ≤P0≤4V min For example, P0 / V min It can be 0.5, 0.8, 2.0, 2.5, 3.8, 4.0, or any range of both. This is achieved by selecting P0 and V. min Satisfying 0.5≤P0 / V min ≤4.0, which allows the average spacing of multiple sets of sliding limit components 14 to be P0 and the moving speed V of the bed board body 121. min Matching effectively reduces friction and resistance during sliding, making the movement of the bed board body 121 smoother and also helping to reduce vibration and noise. When P0 / V min When P0 / V is less than 0.5, the sliding limit components 14 are too densely arranged, which not only increases the friction between them, but also makes maintenance inconvenient; while when P0 / V min When the value is greater than 4, the sliding limit component 14 is too loosely arranged, which will lead to poor stability of the bed body component 12.

[0040] With V min Taking a value of 200 mm / s as an example, the average distance P0 of the multiple sets of sliding limit components 14 in the vertical direction satisfies: 100 mm ≤ P0 ≤ 800 mm. It should be noted that if the traction drive mechanism 13 drives the bed plate body 121 to move at a constant speed in the vertical direction, then V... min A uniform moving speed can be taken; if the traction drive mechanism 13 drives the bed plate body 121 to move non-uniformly in the vertical direction, then V min You can choose the minimum movement speed.

[0041] In this embodiment, multiple sets of sliding limiting components 14 are disposed within the central bearing area 1212. Specifically, in the vertical direction, the length of the central bearing area 1212 is X. m The average vertical spacing of multiple sets of sliding limit components 14 is P0, and the number of sliding limit components 14 is N. Then N satisfies: N=[X m / P0].

[0042] In this embodiment, the sliding limit components 14 can be evenly distributed or unevenly distributed within the central bearing area. The vertical distance between two adjacent sets of sliding limit components 14 is P. i .

[0043] When multiple sliding limit components 14 are evenly distributed, the distance Pi between two adjacent sets of sliding limit components 14 is the same as the average distance P0 between multiple sets of sliding limit components 14. At this time, the load can be more evenly distributed among each sliding limit component 14, reducing vibration and shaking caused by uneven force, which helps to improve the stability of the vertical movement of the bed board body 121.

[0044] When multiple sliding limit components 14 are not evenly distributed, the vertical spacing P between two adjacent sets of sliding limit components 14 is... i The average distance P0 satisfies: 0 ≤ |P i -P0|≤1 / 3 P0, so that the distribution positions of multiple sliding limit components 14 can be set according to the load, preventing the spacing P between adjacent sliding limit components 14 from being too large. i Excessive deviation leads to severely uneven pressure distribution among the sliding limit components 14. For example, when the load on the bed assembly 12 is more concentrated in its lower region, the sliding limit components 14 distributed in the lower region of the bed assembly 12 should be more densely packed. In this case, the pressure distribution can be adjusted according to 0 ≤ |P|. i -P0|≤1 / 3 P0 selects the vertical spacing between two adjacent sets of sliding limit components 14 to make the movement of the bed board body 121 smoother.

[0045] Furthermore, to prevent the bed board body 121 from detaching or going out of control under extreme conditions such as high-speed movement and heavy load, the maximum spacing of the sliding limit components 14 must not exceed 0.5L. Therefore, the spacing P between two adjacent sets of sliding limit components 14 is required to be... i Satisfy: 0.1L≤P i ≤0.5L.

[0046] See Figure 5 , Figure 5This is an enlarged schematic diagram of a sliding limiting component 14 according to an embodiment of this application. The sliding limiting component 14 includes a first mating part 141 and a second mating part 142. The first mating part 141 is connected to the bed board body 121, and the second mating part 142 is connected to the guide part 112. When the bed board body 121 moves vertically relative to the guide member 11, the first mating parts 141 and second mating parts 142 of n sets of sliding limiting components 14 are engaged and connected, while the first mating parts 141 and second mating parts 142 of the remaining sliding limiting components 14 are separated, so that the bed board body 121 can be slidably mounted on the guide part 112 in the vertical direction. n satisfies: n≥1 / 4N, that is, at least 1 / 4 of the first mating parts 141 and second mating parts 142 of the sliding limiting components 14 are engaged and connected to ensure the stability of the sliding connection between the bed board body 121 and the guide part 112, and avoid the bed board body 121 from tipping over due to insufficient connection area between the bed board body 121 and the guide member 11.

[0047] In this embodiment of the application, the sliding limit component 14 may be a pulley and slide rail assembly.

[0048] Specifically, the first mating part 141 includes a first pulley 1411 arranged along a first horizontal direction A and a second pulley 1412 arranged along a second horizontal direction B, the first horizontal direction A being perpendicular to the second horizontal direction B. The second mating part 142 includes a first slide rail 1421 that mates with the first pulley 1411 and a second slide rail 1422 that mates with the second pulley 1412.

[0049] Further, see Figure 5The bed board body 121 has sliding portions 1214 on both sides of the board surface near the guide portion 112. A sliding groove 1215 is formed between the sliding portion 1214 and the board surface of the bed board body 121, and the two sliding grooves 1215 are arranged opposite to each other. The first pulley 1411 is parallel to the second horizontal direction B, and the first pulley 1411 is rotatably mounted on the sliding portion 1214 around its axis, and a portion of the first pulley 1411 extends into the sliding groove 1215. The second pulley 1412 is parallel to the first horizontal direction A, and the second pulley 1412 is rotatably mounted on the sliding portion 1214 around its axis, and a portion of the second pulley 1412 extends into the sliding groove 1215. The guide portion 112 includes a T-shaped guide portion 1121, wherein the T-shaped guide portion 1121 includes a transverse guide rail and a longitudinal guide rail perpendicularly connected to the transverse guide rail. Both the transverse and longitudinal guide rails are provided in the sliding groove 1215. The longitudinal guide rail forms a first slide rail 1421, and the transverse guide rail forms a second slide rail 1422. Two first pulleys 1411 are respectively disposed on opposite sides of the first slide rail 1421 in the first horizontal direction A and slide in contact with the first slide rail 1421. Thus, the sliding limiting assembly 14 can allow the bed board body 121 to slide in connection with the guide portion 112 and can limit the relative displacement between the two in the first horizontal direction A. The second pulley 1412 slides in contact with the second slide rail 1422 in the second horizontal direction B and clamps the T-shaped guide portion 1121 with the first pulley 1411 in the second horizontal direction B. Thus, the sliding limiting assembly 14 can allow the bed board body 121 to slide in connection with the guide portion 112 and can limit the relative displacement between the two in the second horizontal direction B. Understandably, this horizontal limiting effectively prevents the bed board body 121 from shifting or wobbling in the horizontal direction. First, horizontal limiting of the bed board body 121 ensures the stability of the upright patient bed 10 during vertical movement, effectively preventing horizontal wobbling caused by external forces or internal mechanical movement, providing a stable and comfortable examination environment for the patient. Second, this horizontal limiting also helps improve the positioning accuracy of the upright patient bed 10 to the imaging position, ensuring accurate focusing for each examination and reducing the risk of misdiagnosis or missed diagnosis due to positional deviations. Finally, by restricting the horizontal movement of the bed board body 121, potential wobbling during imaging can be significantly reduced, thus avoiding the adverse effects of bed board body 121 and upright patient bed 10 wobbling on image quality, ensuring that doctors can obtain clear and accurate medical images, providing strong support for diagnosis.

[0050] The above is merely an illustrative description of the structure of the sliding limit component 14. The structure of the sliding limit component 14 is not limited in this application embodiment. Any structure that enables the bed board body 121 to slide smoothly and steadily relative to the guide portion 112 in the vertical direction is applicable to this application. For example, in some other embodiments, the sliding limit component 14 may also be a ball bearing slide rail assembly.

[0051] In the bed assembly 12 of this embodiment, the bed assembly 12 has a center of gravity. Specifically, a bottom support plate 122 is disposed at the bottom of the bed board body 121, and the bottom support plate 122 has a bearing surface for the patient to stand with both feet on it. See also Figure 4 In the vertical direction, the distance M between the bed's center of gravity and the bearing surface is specified. To ensure the stability of the bed assembly 12 during vertical movement, M satisfies the following condition: 1 / 4 ≤ M / L ≤ 1 / 2. When the distance M / L between the bed's center of gravity and the bearing surface is greater than 1 / 2, the center of gravity is too high, significantly reducing the stability of the bed assembly 12. It is prone to swaying or tipping under external forces or disturbances, which is detrimental to patients requiring stable support. Conversely, when the distance M / L is less than 1 / 4, the center of gravity is too low, limiting the flexibility of the bed assembly 12. During vertical movement, the response speed of the bed assembly 12 slows down, and the weight concentrated at the bottom of the bed assembly 12 also affects its overall structural strength. Preferably, the distance M / L between the bed's center of gravity and the bearing surface is 1 / 3.

[0052] See Figure 2 In this embodiment of the application, the height of the bottom support plate 122 is L in the thickness direction of the bed board body. d Understandably, to ensure that the base plate 122 provides sufficient standing space for the patient, the height of the base plate 122 is required to be at least 5mm greater than the height of the human abdomen or soles of the feet. Preferably, the height of the base plate 122 can be 3000mm.

[0053] Furthermore, the counterweight 123 is installed on the base plate 122. The counterweight 123 is used to adjust the distance M between the center of gravity of the bed assembly 12 and the bearing surface in the vertical direction. It is understood that, in the embodiments of this application, when the space between the bed board body 121 and the connecting part 111 is suitable, the counterweight 123 can also be installed on the bed board body 121. For example, the counterweight 123 can be set on the plate surface of the bed board body 121 near the guide member 11.

[0054] It should be noted that, in the embodiments of this application, the center of gravity of the bed assembly 12 can be determined by a center of gravity measuring instrument, or estimated by computer modeling and numerical simulation, or determined by suspension testing during the design and production process.

[0055] In this embodiment, the bed assembly 12 further includes a protective plate 125, which is disposed on opposite sides of the bed body 121 to provide protection for the patient and prevent the patient from rubbing against the inner wall surface of the magnet unit 21. Figure 2 As shown, the height of the guard plate 125 is L in the thickness direction of the bed board body 121. hUnderstandably, to ensure that the protective plate 125 provides effective protection for the patient, its height must be at least 5 mm greater than the average human arm thickness. Preferably, the height of the protective plate 125 can be 2000 mm.

[0056] See Figures 2-5 In this embodiment, the restraint member 124 is used to fix the patient to ensure their safety and imaging quality. The restraint member 124 includes an axillary support 1241, a movable restraint strap 1242, and a fixed restraint strap 1243.

[0057] It should be noted that a constraint track 1216 is provided vertically on the bed board body 121. The constraint track 1216 is used for slidingly mounting the underarm support 1241 and the movable restraint strap 1242. It is understood that the height and position of the upper limbs of patients of different heights will vary significantly. Therefore, in this embodiment of the application, the underarm support 1241 and the movable restraint strap 1242 are designed to be slidably adjustable to accommodate the height of different patients.

[0058] Specifically, the constraint track 1216 includes an upper constraint track and a lower constraint track. In this embodiment, both the upper and lower constraint tracks include two tracks disposed on opposite sides of the bed board body 121, wherein, as shown... Figure 4 As shown, the distance between the upper constraint tracks in the width direction of the bed board body 121 is D. s1 The distance between the lower constrained orbits is D. x1 The width of the bed board body 121 is Y, D s1 D s2 Satisfy: D s1 ≥0.8Y, and YD s1 ≥10mm; D s2 ≥0.8Y, and YD s2 ≥10mm. This can be understood as the distance D between the upper constraint tracks. s1 When Y is less than 0.8, the distance D between the upper constrained orbits s1 The bed board is too short, making it difficult for the underarm support 1241 and the movable restraint strap 1242 installed on the upper restraint track to adapt to patients of different body types and to provide effective support / restraint. Furthermore, the width Y of the bed board body 121 and the distance D between it and the upper restraint track are also insufficient. s1 When the difference is less than 10mm, the upper constraint track is positioned too close to the edge of the bed board body 121, which weakens the structural strength of the bed board body 121, reduces the fixing stability of the upper constraint track, and increases safety risks. The distance D between the lower constraint tracks... x1 The same applies to the limitations. In the embodiments of this application, D... s1 and D x1It can be set to equal distance or unequal distance.

[0059] The upper part of the central support area 1212 is equipped with an upper constraint track, and the lower part is equipped with a lower constraint track. The axillary support 1241 is slidably mounted on the upper part of the bed board body 121, i.e., on the upper constraint track, and is used to provide support for the patient's armpit. It is understood that, in order to provide sufficient support for the patient and avoid interference with other components, the thickness of the axillary support 1241 should be reasonably set. Furthermore, as... Figure 2 As shown in this embodiment, the height of the bottom support plate 122 is L in the thickness direction of the bed board body 121. d The height of the guard plate 125 is L. h The thickness of the underarm support 1241 is L. y Among them, Ly satisfies: 0.8L h ≤L y ≤L d The height of the underarm support 125 is designed based on the average thickness of a human arm. When the thickness L of the underarm support 1241... y Less than 0.8L h At that time, the thickness of the underarm support 1241 was too small to provide effective support for the patient; while the thickness L of the underarm support 1241 was too small. y Greater than L d If the thickness of the axillary support 1241 is too large, it may interfere with the inner wall of the magnet unit 21, affecting the installation of the upright patient bed 10. When the thickness L of the axillary support 1241 is too large... y No more than 0.8L h and not less than L d At the same time, it can not only provide effective support for the patient, but also avoid interference with the inner wall surface of the magnet unit 21.

[0060] The movable restraint straps 1242 are slidably mounted on the bed board body 121 for restraining the patient's body. In this embodiment, there are at least two movable restraint straps 1242, wherein at least one movable restraint strap 1242 is slidably mounted in the upper restraint track, and at least one movable restraint strap 1242 is slidably mounted in the lower restraint track. It should be noted that in this embodiment, the sliding distance of the upper restraint track in the vertical direction is D. s2 The sliding distance of the lower constraint track is D. x2 To ensure that the movable restraint strap 1242 effectively restrains patients of different heights, the sliding adjustment range of the upper and lower restraint tracks needs to be sufficient. s2 D x2 The following conditions must be met: D s2 +D x2 >0.45L; and Ds2 +D x2 >60mm.

[0061] Furthermore, the fixed restraint strap 1243 is fixedly installed in the lower area of ​​the bed board body 121. Specifically, the fixed restraint strap 1243 is located below the lower restraint track, and the fixed restraint strap 1243 is used to restrain the patient's legs.

[0062] In this embodiment, the bed assembly 12 further includes a locking member 126, which is connected to the bed board body 121. When the bed assembly 12 is vertically moved to the imaging position, the locking member 126 is used to lock the bed board body 121 and the magnet unit 21, preventing the bed board body 121, i.e., the patient fixed on it, from shaking. In this embodiment, the locking member 126 can be located at the head edge 1210 or the foot edge of the bed board body 121. It can be understood that the head edge 1210 of the bed board body 121 is the edge of the bed board near the patient's head, and the foot edge is the edge of the bed board near the patient's feet.

[0063] In this embodiment, the upright patient bed 10 further includes a buffer assembly 15, which is disposed below the bed frame assembly 12. Specifically, the buffer assembly 15 can be fixedly installed on the ground or a wall. It is understood that the buffer assembly 15 is used to buffer the landing speed of the bed frame assembly 12 to prevent the bed frame assembly 12 from falling too quickly, causing impact and discomfort to the patient, or even damaging the mechanical structure upon landing.

[0064] Please see Figure 6 , Figure 6 This is a schematic diagram of a traction drive mechanism 13 according to an embodiment of this application. In this embodiment, the traction drive mechanism 13 is used to connect to the bed board body 121 and to traction the bed board body 121 to move in the vertical direction, so as to move the patient to the imaging space 210 of the MRI imaging device 20 for MRI detection.

[0065] See Figure 6 In this application, the traction drive mechanism 13 can be a rope traction drive mechanism, which includes a traction rope 131 and a first drive assembly 132. The traction rope 131 is connected to the bed board body 121, and the first drive assembly 132 is connected to the traction rope 131. The first drive assembly 132 is used to adjust the length of the traction rope 131 in the vertical direction so as to traction the bed board body 121 to move in the vertical direction.

[0066] The bed assembly 12 includes at least one first limiting portion 127 mounted on the bed board body 121. The first limiting portion 127 has a first limiting space for the traction rope to pass through, so as to constrain the portion of the traction rope 131 connected to the bed board body 121 to move in the vertical direction.

[0067] In this embodiment, the bed board body 121 has a head edge 1210 adjacent to the patient's head. When the bed assembly 12 is provided with a first limiting part 127, in the vertical direction, the distance from the first limiting part 127 to the head edge 1210 is m1, and the minimum distance from the first limiting part 127 to the center of gravity of the bed is m0. Here, m1 satisfies: 0.2L ≤ m1 ≤ 0.3L; m0 satisfies: 0.05L ≤ m0 ≤ 0.3L. This ensures that the distances from the first limiting part 127 to the center of gravity of the bed board body 121 and from the first limiting part 127 to the head edge 1210 of the bed board body 121 are both appropriate. The first limiting part 127 can better pull the traction rope 131, preventing the traction rope 131 from becoming skewed, thereby enabling smoother vertical movement of the bed board body 121 and reducing the risk of swaying and tilting of the bed board body 121 during vertical movement.

[0068] When the bed assembly 12 includes multiple first limiting parts 127, in the vertical direction, the distance between the first limiting part 127 at the highest point and the head edge 1210 is m2, where m2 and L satisfy: 0 ≤ m2 ≤ 0.3L. When the distance m2 between the first limiting part 127 at the highest point, i.e., the first limiting part 127 closest to the head edge 1210, and the head edge 1210 is greater than 0.3L, there are too few fixing points for the traction rope 131 near the head edge 1210. The traction rope 131 is subject to a small restraint range and is prone to deformation or bending. This is to prevent the traction rope 131 from bending and affecting its movement.

[0069] See also Figure 6 In this embodiment of the application, the traction drive mechanism 13 further includes a safety rope 133 and a second drive assembly 134, wherein one end of the safety rope 133 is connected to the bed board body 121 and the other end is connected to the second drive assembly 134.

[0070] The bed frame assembly 12 includes at least one second limiting portion 128 installed on the bed board body 121. The second limiting portion 128 has a second limiting space for the safety rope 133 to pass through, thereby constraining the portion of the safety rope 133 connected to the bed board body 121 to move vertically. It should be noted that in this embodiment, the safety rope 133 serves as a safety redundancy protection, used to stably connect to and fix the bed frame assembly 12 in the event of failure of the rope traction drive mechanism or other circumstances causing the bed frame assembly 12 to fall, thereby preventing the bed frame assembly 12 from overturning. In this embodiment, the safety rope 133 is fixed to the bed board body 121 at multiple points, and at least three second limiting portions 128 are installed on the bed board body 121. In the vertical direction, the distance from the second limiting portion 128 at the highest point to the head edge 1210 is m3, where m3 satisfies: 0 ≤ m3 ≤ 0.3L. When the distance m3 between the second limiting part 128 at the highest point and the head edge 1210 is greater than 0.3L, there are too few fixing points for the safety rope 133 near the head edge 1210. The safety rope 133 is easily deformed or bent due to its small restraint range. This is to prevent the safety rope 133 from bending and affecting its movement.

[0071] In addition, at least one second limiting part 128 has an absolute distance of m4 from the center of gravity of the bed, where m4 satisfies: 0≤m4≤0.1L. Providing at least one second limiting part 128 near the center of gravity of the bed helps to quickly maintain the stability of the bed assembly 12 in the event of an accidental fall.

[0072] It is understood that the traction drive mechanism 13 in the embodiments of this application may also be a hydraulic push rod drive, motor drive or other drive mechanism to achieve traction and drive of the bed assembly 12.

[0073] This application also provides a nuclear magnetic resonance imaging device 20, see [link to previous document]. Figure 7 , Figure 7 This is a schematic diagram of an MRI imaging device 20 according to an embodiment of this application. The MRI imaging device 20 includes a magnet unit 21 and the aforementioned upright patient bed 10. The magnet unit 21 has a vertically connected imaging space 210, and the traction drive mechanism 13 of the upright patient bed 10 is used to pull the bed board body 121 to move vertically, so as to move the patient into the imaging space 210 for MRI detection.

[0074] Specifically, the magnet unit 21 has an inner wall surface of a magnet for defining the imaging space 210, see [link to relevant documentation]. Figure 8 , Figure 8 This is a schematic diagram showing the relative position of the magnet unit 21 and the upright patient bed 10 according to an embodiment of this application. The distance between the bed board body 121 and the inner wall of the magnet is A1, and A1 satisfies: 5mm + L×sin(0.5°) ≤ A1 ≤ 20mm.

[0075] When A1 is less than 5mm + L × sin(0.5°), the distance between the bed board body 121 and the inner wall of the magnet is too small. First, this small distance restricts the movement and adjustment space of the bed board body 121. Second, after the bed board body 121 supports a patient, it may tilt due to uneven weight distribution or mechanical performance issues of the bed assembly 12 itself. If the distance between the bed board body 121 and the inner wall of the magnet is too small, the bed board body 121 may interfere with the inner wall of the magnet when tilted. This interference may not only damage the bed board body 121 or the magnet, but also pose a threat to the patient's safety. Furthermore, interference may also affect the quality and accuracy of MRI examinations: when the bed board body 121 contacts or rubs against the inner wall of the magnet, unnecessary noise or vibration may be generated. This noise or vibration may interfere with the acquisition and processing of MRI signals, thereby affecting image quality and diagnostic accuracy.

[0076] When A1 is greater than 20mm, the distance between the bed plate body 121 and the inner wall of the magnet is too large. This may not only affect the uniformity of the magnetic field, causing artifacts, distortion or signal attenuation in the MRI image, reducing the image quality and diagnostic accuracy, but also increase the change in the magnetic field gradient, making the MRI scan take longer to complete.

[0077] The inner diameter of the magnet unit 21 is D1. The bed board body 121 has a support space for accommodating the patient. In the thickness direction of the bed board body 121, the depth of the support space is H1, and H1 and D1 satisfy: 0.1D1≤H1≤0.4D1. It can be understood that in this embodiment, the support space can be defined by the bed board body 121 and two guard plates 125 connected to the same side of the bed board body 121 and arranged opposite to each other. The depth of the support space depends on the height of the guard plates 125.

[0078] In the upright patient bed 10 of this embodiment, firstly, the bed board body 121 is slidably mounted on the guide portion 112 in the vertical direction. The bed board body 121 can vertically transport the patient into the imaging space 210 of the MRI imaging device 20, making the upright patient bed 10 compatible with the upright MRI imaging device. Secondly, the sliding limiting component 14 is disposed between the bed board body 121 and the guide portion 112, which can limit the relative displacement between the two in the horizontal direction, ensuring the stability of the upright patient bed 10 during vertical movement and imaging, effectively preventing horizontal shaking caused by external forces or internal mechanical movement, and helping to improve positioning accuracy and imaging quality. Thirdly, in this embodiment, the bed board body 121 is provided with a constraint member 124, which can constrain the patient's range of motion, limit the patient's autonomous movements during imaging, and improve the patient's positional stability. Finally, in the traction drive mechanism 13, the traction rope 131 passes through the first limiting part 127 and connects to the bed board body 121. This application sets the position of the first limiting part 127 based on the center of gravity of the bed assembly 12, which can prevent the bed assembly 12 from tipping over during vertical movement. In summary, the upright patient bed 10 in this embodiment can provide stable and safe vertical lifting for the MRI imaging device 20, providing sufficient restraint for the patient and ensuring the imaging quality of the upright MRI.

[0079] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vertical patient bed for use with an MRI scanner, characterized in that, include: A guide component includes a connecting part and a guiding part. The connecting part is fixedly installed on a support component, which is the inner wall surface of a wall or magnet unit. The guiding part is disposed at both ends of the connecting part and is arranged in a vertical direction. The guiding part includes a T-shaped guiding part. The bed frame assembly includes a bed board body and a restraint member. The bed board body is used to support a standing patient and is slidably mounted on the guide portion in a vertical direction. The restraint member is provided on the bed board body and is used to restrict the patient's range of motion. Sliding portions are provided on both sides of the board surface of the bed board body near the guide portion. A sliding groove is formed between the sliding portion and the board surface of the bed board body, and the two sliding grooves are arranged opposite to each other. Multiple sets of sliding limiting components are arranged at intervals along the vertical direction. Each sliding limiting component includes a first mating part and a second mating part. The first mating part is installed on the sliding part, and the T-shaped guide part forms the second mating part. The T-shaped guide part is disposed in the sliding groove and slides in contact with the first mating part, so that the sliding limiting component allows the bed board body to slide and connect with the guide part and restricts the relative displacement between the two in a first horizontal direction and a second horizontal direction. The first horizontal direction is perpendicular to the second horizontal direction. and A traction drive mechanism is connected to the bed board body and is used to pull the bed board body to move in the vertical direction, so as to move the patient to the imaging space of the MRI imaging device for MRI detection.

2. The upright patient bed according to claim 1, characterized in that, The average spacing between the multiple sets of sliding limit components in the vertical direction is P0, and the speed at which the traction drive mechanism pulls the bed board body to move in the vertical direction is V. min Among them, P0 and V min Satisfies: 0.5 ≤ P0 / V min ≤4.

3. The upright patient bed according to claim 2, characterized in that, The bed board body has a central support area for the patient to lean against; In the vertical direction, the length of the bed board body is L, and the length of the central support area is X. m The distance between two adjacent sets of sliding limiting components in the vertical direction is Pi, and the number of sliding limiting components is N. The upright patient bed satisfies at least one of the following conditions. (1) 0≤|P i -P0|≤1 / 3 P0; (2) 0.1L≤P i ≤0.5L; (3)N=X m / P0。 4. The upright patient bed according to claim 3, characterized in that, The first mating part of the n sets of sliding limiting components can slide and engage with the second mating part so that the bed board body can be slidably installed on the guide part in the vertical direction, where n satisfies: n≥1 / 4N.

5. The upright patient bed according to claim 1, characterized in that, The bed board body has a head safety area, a middle support area and a foot safety area arranged sequentially in the vertical direction, wherein the middle support area is the area for the patient to lean against; In the vertical direction, the length of the bed board body is L, the length of the head safety area is X1, the length of the foot safety area is X2, and the length of the central support area is X. m The traction drive mechanism pulls the guide part to move vertically at a speed of V. min The upright patient bed meets at least one of the following conditions; (1)X1=Max{0.01V min +5,25}? (2)X2=Max{0.01V min +5,25}; (3) 0.7L≤X m ≤0.9L。 6. The upright patient bed according to claim 1, characterized in that, The bed assembly has a support surface for the patient to stand on with both feet; The bed assembly has a center of gravity, and in the vertical direction, the distance between the center of gravity and the bearing surface is M. The length of the bed board body is L, wherein M and L satisfy: 1 / 4 ≤ M / L ≤ 1 / 2.

7. The upright patient bed according to claim 6, characterized in that, The bed assembly includes: A base plate, wherein the base plate is disposed at the bottom of the bed board body, and the base plate has the bearing surface; and A counterweight is installed on the base plate and is used to adjust the distance M between the center of gravity of the bed assembly and the bearing surface in the vertical direction.

8. The upright patient bed according to claim 1, characterized in that, The traction drive mechanism includes: The traction rope is connected to the bed board body; A first drive assembly is connected to the traction rope and is used to adjust the length of the traction rope in the vertical direction to pull the bed board body to move in the vertical direction. The bed assembly includes a first limiting portion mounted on at least one of the bed board bodies, the first limiting portion having a first limiting space for the traction rope to pass through, thereby constraining the portion of the traction rope connected to the bed board body to move along the vertical direction.

9. The upright patient bed according to claim 8, characterized in that, The bed assembly has a center of gravity. In the vertical direction, the minimum distance between the first limiting part and the center of gravity is m0. The length of the bed board body is L, where m0 and L satisfy: 0.05L≤m0≤0.3L.

10. The upright patient bed according to claim 9, characterized in that, The bed board body has a head edge adjacent to the patient's head; The bed assembly includes a first limiting part, and in the vertical direction, the distance between the first limiting part and the edge of the head is m1, where m1 and L satisfy: 0.2L≤m1≤0.3L; or, The bed assembly includes a plurality of first limiting parts. In the vertical direction, the distance between the first limiting part at the highest point and the edge of the head is m2, where m2 and L satisfy: 0≤m2≤0.3L.

11. The upright patient bed according to claim 8, characterized in that, The traction drive mechanism also includes a safety rope and a second drive assembly, wherein one end of the safety rope is connected to the bed board body and the other end is connected to the second drive assembly; The bed assembly includes a second limiting portion mounted on at least one of the bed board bodies, the second limiting portion having a second limiting space for the safety rope to pass through, thereby constraining the portion of the safety rope connected to the bed board body to move vertically.

12. The upright patient bed according to claim 1, characterized in that, The constraint includes: An underarm support is slidably installed on the upper part of the bed board body to provide support for the patient's armpit; Movable restraint straps, slidably mounted on the bed board body, are used to restrain the patient's body; and A fixed restraint strap is fixedly installed in the lower part of the bed board body to restrain the patient's legs.

13. A nuclear magnetic resonance imaging device, characterized in that, include: The magnet unit has a vertically conductive imaging space; and, The upright patient bed as described in any one of claims 1-12, wherein the traction drive mechanism of the upright patient bed is used to traction the bed board body to move in a vertical direction, so as to move the patient to the imaging space for MRI detection.

14. The nuclear magnetic resonance imaging device according to claim 13, characterized in that, The magnet unit has an inner wall surface of a magnet for defining the imaging space, the distance between the bed board body and the inner wall surface of the magnet is A1, and the length of the bed board body in the vertical direction is L, wherein A1 and L satisfy: 5mm + L × sin(0.5°) ≤ A1 ≤ 20mm; The inner diameter of the magnet unit is D1, and the bed board body has a support space for accommodating the patient. In the thickness direction of the bed board body, the depth of the support space is H1, and H1 and D1 satisfy: 0.1D1≤H1≤0.4D1.

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