WO2015070488A1 - 核磁共振成像系统 - Google Patents

核磁共振成像系统 Download PDF

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Publication number
WO2015070488A1
WO2015070488A1 PCT/CN2013/088147 CN2013088147W WO2015070488A1 WO 2015070488 A1 WO2015070488 A1 WO 2015070488A1 CN 2013088147 W CN2013088147 W CN 2013088147W WO 2015070488 A1 WO2015070488 A1 WO 2015070488A1
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Prior art keywords
support
patient
seat
magnetic resonance
resonance imaging
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PCT/CN2013/088147
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English (en)
French (fr)
Inventor
赵华炜
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江苏麦格思频仪器有限公司
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Publication of WO2015070488A1 publication Critical patent/WO2015070488A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
    • G01R33/56375—Intentional motion of the sample during MR, e.g. moving table imaging
    • G01R33/56383—Intentional motion of the sample during MR, e.g. moving table imaging involving motion of the sample as a whole, e.g. multistation MR or MR with continuous table motion

Definitions

  • the invention relates to a nuclear magnetic resonance imaging system. Background technique
  • Magnetic resonance imaging (MRI, English full name: magnetic resonance imaging) system is often used in the field of medical and health, that is, the use of hydrogen nuclei (protons) in human tissue in the magnetic field is excited by radio frequency pulses to generate nuclear magnetic resonance, resulting in magnetic resonance signals
  • An imaging technique that reconstructs images of a certain level of the human body through computer processing.
  • the patient's body In magnetic resonance imaging applications, the patient's body (or target) is typically placed in an imaging area in a barrel-like magnetic structure that is determined by the design and location of the MRI system components.
  • One of the problems is that the central space for placing the patient's body is very limited. Because the bed is also placed at the same time, the patient lying down is prone to a closed fear. In order to properly position the patient's body to be imaged, some limb imaging, such as the shoulder, can be very difficult, even impossible for a large patient.
  • the present invention provides a nuclear magnetic resonance imaging system which is capable of accurately placing a portion to be imaged in an imaging region without placing the patient's body in a narrow confined space.
  • the present invention provides a nuclear magnetic resonance imaging system including a base; a magnet unit mounted at one end of the base, the magnet unit providing a main magnetic field space; and a swivel unit mounted on the The other end of the base is movable relative to the magnet unit Translating and/or rotating, the swivel chair unit is configured to lift a body part of a patient to be placed against it into the main magnetic field space.
  • the magnet unit comprises a main magnet, a supporting column and a supporting leg, the supporting leg is fixed on the base, one end of the supporting column is fixed on the supporting leg, and the other end is opposite to the main magnet Hinged, the main magnetic field space is provided within the main magnet.
  • the magnet unit is further provided with a lowering negative force mechanism, and one end of the negative force mechanism is hinged to the upper end of the support column.
  • an outer side of the main magnet is further provided with an operation panel, and the operation panel is connected to the swivel chair unit and the negative force mechanism by electrical connection or wireless connection.
  • the swivel chair unit comprises a translation seat, a rotation seat, a telescopic mechanism, a support seat, a seat back, a leg support, an arm support and a shoulder support
  • the translation seat is mounted on the base and at the base Moving upward in the X direction
  • the rotating base is mounted on the translation seat and moves in the Y direction and the R z direction on the translation seat
  • one end of the telescopic mechanism is mounted on the rotating seat, and is in the rotating seat
  • the upper side is stretched in the Z direction
  • the support seat is fixed to the other end of the telescopic mechanism
  • the seat back, the leg support, the arm support and the shoulder support are respectively mounted on the support seat and form a chair.
  • the X direction, the Y direction and the Z direction are orthogonal to each other, and the R z direction indicates rotation around the Z direction.
  • the seat back, the leg support, the arm support and the shoulder support are respectively rotatably coupled to the support seat.
  • the nuclear magnetic resonance imaging system provided by the present invention has the following advantages:
  • FIG. 1 is a front elevational view of a nuclear magnetic resonance imaging system according to an embodiment of the present invention
  • Figure 2 is a plan view of Figure 1;
  • FIG. 3 is a schematic perspective view of a nuclear magnetic resonance imaging system according to an embodiment of the present invention (lower extremity imaging);
  • FIG. 4 is a schematic perspective view of a nuclear magnetic resonance imaging system (upper limb imaging) according to an embodiment of the present invention.
  • the magnetic resonance imaging system includes a base 10, a magnet unit 20 and a swivel unit 30 mounted on the base 10, the magnet unit 20 providing a patient for accommodating a patient
  • the main magnetic field space 210 (indicated by a dashed circle) of the body to be imaged, the swivel unit 30 is translatable and rotatable relative to the magnet unit 20.
  • the patient lies against the swivel unit 30, and the patient's body to be imaged is lifted into the main magnetic field space 210 by adjusting the swivel unit 30.
  • the present invention utilizes the base 10 to fix the initial relative position of the magnet unit 20 and the swivel unit 30.
  • the magnet unit 20 includes a main magnet 21, a supporting column 22 and a supporting leg 23, and the supporting leg 23 is fixed on the base 10, and one end of the supporting column 22 Fixed to the supporting leg 23, the other end is hinged with the main magnet 21, the main magnetic field 210 is provided in the main magnet 21, specifically, the main magnet 21 and the attached gradient coil system, uniform
  • the field system, the RF coil system, and the associated spectrum analyzer, power amplifier and imaging workstation constitute the basic system of the MRI.
  • the specific structure is the same as that of the prior art, and will not be described here.
  • the nuclear magnetic resonance imaging system provided by the invention works: Based on the principle of magnetic resonance, the proton spin inside the object to be imaged is excited by the RF coil system and receives the resonance signal through the spatial coding of the gradient coil system under the main magnetic field generated by the magnet. And complete image reconstruction through the imaging workstation.
  • the patient's body tissue or target is placed in the imaging area in the center of the magnet.
  • the imaging area is determined by the design and positional layout of the MRI system components. To achieve good imaging results, the imaging area should be
  • the position of the main magnetic field space 210 corresponds to ensure that when the patient's body tissue or object is placed in the main magnetic field space 210, the patient's body tissue or target is also located within the imaging area.
  • the magnet unit 20 is further provided with a liftable negative force mechanism 24, and the upper end of the negative force mechanism 24 is hinged with the support column 22, and the initial state.
  • the negative force mechanism 24 is received at a position that is in contact with the support column 22, that is, the lower end of the negative force mechanism 24 abuts on the support column 22; when MRI is required for the joint of the limb, the negative The force mechanism 24 is pivoted in the counterclockwise direction with its upper end as an axis, that is, the lower end of the negative force mechanism 24 is lifted upward from the support column 22, and the raised negative force mechanism 24 is used to support the limb joint portion, and Apply a certain amount of force to it to complete the imaging of the limb joint.
  • the negative force mechanism 24 is used to control the position and the negative force of the body part to be imaged, and cooperate with the swivel chair unit 30 to accurately place the image to be imaged on the main magnetic field.
  • Central 210 Within the imaging area.
  • an outer side of the main magnet 21 is further provided with an operation panel 25, and the operation panel 25 is connected to the swivel chair unit 30 and the negative force mechanism 24 by electrical connection or wireless connection. .
  • Instructions are issued from the operation panel 25 to the swivel unit 30 and the negative force mechanism 24, so that the patient's body position can be adjusted to accurately and simply place the portion to be imaged into the imaging area.
  • the swivel chair unit 30 includes a translation seat 31, a rotation seat 32, a telescopic mechanism 33, a support seat 34, a seat back 35, a leg support 36, an arm support 37, and a shoulder.
  • a support 38 the translation seat 31 is mounted on the base 10 and moves in the X direction on the base 10; the rotating base 32 is mounted on the translation seat 31, and is in the Y direction on the translation seat 31.
  • one end of the telescopic mechanism 33 is mounted on the rotating base 32, and is extended and contracted in the Z direction on the rotating base 32; the supporting seat 34 is fixed to the telescopic
  • the other end of the mechanism 33 is configured to achieve adjustment of the patient's body in various directions; the seat back 35, the leg support 36, the arm support 37 and the shoulder support 38 are respectively mounted on the support seat 34 and form a chair.
  • the seat back 35, the leg support 36, the arm support 37 and the shoulder support 38 are respectively rotatably connected with the support seat 34, correspondingly supporting the body parts of the patient, and controlling the traction force of the limbs.
  • Imaging site energy Show the situation lesions.
  • FIGS 3-4 there are schematic diagrams showing the state of use of lower limb imaging and upper limb imaging using the nuclear magnetic resonance imaging system of the present invention, respectively.
  • the specific use method is as follows, and the steps thereof include:
  • the operator controls the swivel chair unit 30 to change the position and angle according to the need to lift the patient's body to be imaged into the main magnetic field space 210.
  • the patient's can be adjusted by adjusting one or more of the horizontal and vertical heights of the support seat 34, the angle of the seat back 35, the position and angle of the leg support 36.
  • the lower limbs are lifted into the main magnetic field space 210; similarly, one or more of the support seat 34, the seat back 35, the arm support 37, and the shoulder support 38 can also be adjusted when imaging the patient's upper limbs.
  • the negative force can also be controlled simultaneously The position and negative force of the mechanism 24;
  • the nuclear magnetic resonance imaging system of the present invention it is not necessary for the patient to maintain the same posture for a long time to check, and the angle and positional change of the swivel chair unit 30 help the patient to reach a proper position and perform nuclear magnetic resonance imaging.
  • the present invention provides a nuclear magnetic resonance imaging system and a method of using the same, the system comprising a base 10, a magnet unit 20 mounted on the base 10, and a swivel chair unit 30, the magnet unit 20 providing a main magnetic field space 210, the patient lies on the swivel chair unit 30, and the swivel chair unit 30 lifts the patient's body to be imaged into the main magnetic field space 210.
  • the present invention utilizes the base 10 to fix the initial relative position of the magnet unit 20 and the swivel chair unit 30. When it is necessary to perform nuclear magnetic resonance detection on a certain portion of the patient's body to be imaged, it is only necessary to control the swivel chair unit 30 to adjust its angle and position.
  • the posture of the patient lying on the swivel chair unit 30 can be adjusted, and the operator can lift the patient's body to be imaged into the main magnetic field space 210, thereby providing a large free space for the patient to avoid
  • the claustrophobia is generated, and on the one hand, the patient's body to be imaged is carried out flexibly and accurately into the main magnetic field space, which facilitates the completion of MRI.

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Abstract

一种核磁共振成像系统，包括底座（10）、安装于所述底座（10）上的磁体单元（20）和转椅单元（30）。所述磁体单元（20）上设有一个主磁场空间（210），病人躺靠在所述转椅单元（30）上，所述转椅单元（30）将病人身体待成像部位抬送至所述主磁场空间（210）内。当需要对病人身体上的某个待成像部位进行核磁共振检测时，只需控制所述转椅单元（30）调整其角度和位置，即可调节躺靠在所述转椅单元（30）上的病人的姿态，将病人身体待成像部位抬送至所述主磁场空间（210）内。一方面提供病人较大的自由活动空间，避免产生幽闭恐惧，另一方面灵活地将病人身体待成像部位抬送至所述主磁场空间内（210），便于核磁共振成像的完成。

Description

核磁共振成像系统 技术领域
本发明涉及一种核磁共振成像系统。 背景技术
磁共振成像（MRI, 英文全称： magnetic resonance imaging ) 系统常被用 于医疗卫生领域， 即利用人体组织中氢原子核 （质子）在磁场中受到射频脉 冲的激励而发生核磁共振现象， 产生磁共振信号， 经过电子计算机处理， 重 建出人体某一层面的图像的成像技术。
在磁共振成像应用中， 通常是将病人身体（或目标物）放在一个桶状磁 体结构中的成像区域中， 成像区域由核磁共振成像系统部件的设计和位置布 局决定。 其中一个问题是用于放置病人身体的中心空间非常有限， 由于同时 还放置有病床， 因此躺下的病人容易产生封闭恐惧感。 为了将病人身体待成 像部位恰当地放在成像区域内， 一些肢体成像， 如肩膀， 会非常困难， 对于 体型大的病人甚至是不可能的。
因此， 如何提供一种能够灵活、 精确地将病人身体待成像部位放置到成 像区域内的核磁共振成像系统及其使用方法是本领域的技术人员亟待解决的 一个技术问题。 发明内容
本发明提供一种核磁共振成像系统， 既无需将病人身体置于狭小的密闭 空间内， 又能够将待成像部位精确地放置于成像区域内。
为解决上述技术问题， 本发明提供一种核磁共振成像系统， 该系统包括 底座； 磁体单元， 安装于所述底座的一端， 所述磁体单元提供一个主磁场空 间； 以及转椅单元， 安装于所述底座的另一端， 且可相对于所述磁体单元作 平移和 /或旋转， 所述转椅单元用于将躺靠在其上的一病人的待成像身体部位 抬送至所述主磁场空间内。
较佳地， 所述磁体单元包括主磁体、 支撑立柱以及支撑脚， 所述支撑脚 固定于所述底座上， 所述支撑立柱的一端固定于所述支撑脚上， 另一端与所 述主磁体铰接， 所述主磁体内提供所述主磁场空间。
较佳地， 所述磁体单元还设有一可抬降的负力机构， 所述负力机构的一 端与所述支撑立柱的上端铰接。
较佳地， 所述主磁体的外侧还设有操作面板， 所述操作面板通过电气连 接或无线连接方式与所述转椅单元和负力机构相连。
较佳地， 所述转椅单元包括平移座、 转动座、 伸缩机构、 支撑椅座、 椅 背、 腿部支撑、 手臂支撑以及肩部支撑， 所述平移座安装于所述底座上， 并 在底座上沿 X方向运动； 所述转动座安装于所述平移座上， 并在平移座上沿 Y向及 Rz向运动； 所述伸缩机构的一端安装于所述转动座上， 并在转动座上 沿 Z向伸缩； 所述支撑椅座固定于所述伸缩机构的另一端； 所述椅背、 腿部 支撑、 手臂支撑和肩部支撑分别安装于所述支撑椅座上并组成靠椅， 对应支 撑病人各身体部位， 其中， X向、 Y向和 Z向两两正交， Rz向表示绕 Z向旋 转。
较佳地， 所述椅背、 腿部支撑、 手臂支撑和肩部支撑分别与所述支撑椅 座旋转连接。
与现有技术相比， 本发明提供的核磁共振成像系统具有如下优点：
1. 以磁体单元替代现有技术的桶状磁体结构， 无需将病人身体置于狭小 的空间内， 避免病人产生密闭恐惧感；
2. 以转椅单元替代现有技术中的板床， 能够对身体的各个部位分别进行 支撑， 以便身体的各个部位能够分别被抬起， 并进行位置调整， 使得病人身 体待成像部位能够被更加灵活、 便捷地抬送至主磁场空间内。 附图说明
图 1为本发明一具体实施方式的核磁共振成像系统的主视图；
图 2为图 1的俯视图；
图 3为本发明一具体实施方式的核磁共振成像系统的立体结构示意图（下 肢成像）；
图 4为本发明一具体实施方式的核磁共振成像系统的立体结构示意图（上 肢成像）。
图中： 10-底座、 20-磁体单元、 21-主磁体、 210-主磁场空间、 22-支撑立 柱、 23-支撑脚、 24-负力机构、 25-操作面板、 30-转椅单元、 31-平移座、 32- 转动座、 33-伸缩机构、 34-支撑椅座、 35-椅背、 36-腿部支撑、 37-手臂支撑、 38-肩部支撑。 具体实施方式
为了更详尽的表述上述发明的技术方案， 以下列举出具体的实施例来证 明技术效果； 需要强调的是， 这些实施例用于说明本发明而不限于限制本发 明的范围。
本发明提供的核磁共振成像系统， 如图 1至图 2所示， 包括底座 10、 相 对安装于所述底座 10上的磁体单元 20和转椅单元 30,所述磁体单元 20提供 一个用于容纳病人身体待成像部位的主磁场空间 210 (以虚线圈表示）， 所述 转椅单元 30可相对所述磁体单元 20平移和转动。 病人躺靠在所述转椅单元 30上，通过调节所述转椅单元 30将病人身体待成像部位抬送至所述主磁场空 间 210内。
本发明利用底座 10将磁体单元 20和转椅单元 30的初始相对位置固定， 当需要对病人身体上的某个待成像部位进行核磁共振成像时， 只需控制所述 转椅单元 30调整其角度和位置， 即可调节躺靠在所述转椅单元 30上的病人 的姿态， 配合操作人员将病人身体待成像部位抬送至所述主磁场空间 210内， 一方面提供病人较大的自由活动空间， 避免产生幽闭恐惧， 一方面灵活、 准 确地将病人身体待成像部位抬送至所述主磁场空间 210 内， 便于核磁共振成 像的完成。
较佳地， 请继续参考图 1-2, 所述磁体单元 20包括主磁体 21、 支撑立柱 22以及支撑脚 23 , 所述支撑脚 23 固定于所述底座 10上， 所述支撑立柱 22 的一端固定于所述支撑脚 23上， 另一端与所述主磁体 21铰接， 所述主磁体 21内提供所述主磁场空间 210 , 具体地， 所述主磁体 21及所附的梯度线圈系 统、 匀场系统、射频线圈系统以及配套的频谱分析仪、 功放及成像工作站（均 未图示）构成核磁共振成像基本系统， 其具体的结构与现有技术相同， 此处 不再贅述。 本发明提供的核磁共振成像系统工作时： 基于磁共振原理， 待成 像物体内部的质子自旋在磁体产生的主磁场环境下， 通过梯度线圈系统的空 间编码， 由射频线圈系统激发及接受共振信号， 并通过成像工作站完成图像 重建。 在核磁共振成像应用中， 病人身体组织或目标物放在磁体中央的成像 区域中， 成像区域由核磁共振成像系统部件的设计和位置布局决定， 为了达 到良好的成像效果， 成像区域应当与所述主磁场空间 210 的位置相对应， 即 确保当病人身体组织或目标物放在主磁场空间 210 内时， 该病人身体组织或 目标物也同时位于成像区域内。
较佳地， 请继续参考图 1及图 3-4, 所述磁体单元 20还设有一可抬降的 负力机构 24, 所述负力机构 24的上端与所述支撑立柱 22铰接， 初始状态下， 所述负力机构 24收纳至与所述支撑立柱 22相贴合的位置， 即负力机构 24的 下端靠在支撑立柱 22上； 当需要对肢关节进行核磁共振成像时， 所述负力机 构 24 以其上端为轴， 沿逆时针方向旋转翻起， 即负力机构 24的下端从所述 支撑立柱 22向上抬起， 抬起后的负力机构 24用于支撑肢关节部位， 并向其 施加一定的力， 配合肢关节成像的完成。 又由于所述主磁体 21与所述支撑立 柱 22铰接， 配合所述负力机构 24控制待成像身体部位的位置和负力情况， 与转椅单元 30共同配合， 实现待成像部位精确放置于主磁场空间 210中央的 成像区域内。
较佳地， 请继续参考图 1-4, 所述主磁体 21的外侧还设有操作面板 25 , 所述操作面板 25通过电气连接或无线连接方式与所述转椅单元 30和负力机 构 24相连。 从所述操作面板 25向转椅单元 30和负力机构 24发出指令， 从 而可以调整病人体位， 以将待成像部位精确、 简便地放置到成像区域。
较佳地， 请重点参考图 1和图 2, 所述转椅单元 30包括平移座 31、 转动 座 32、 伸缩机构 33、 支撑椅座 34、 椅背 35、 腿部支撑 36、 手臂支撑 37以及 肩部支撑 38 , 所述平移座 31安装于所述底座 10上， 并在底座 10上沿 X方 向运动； 所述转动座 32安装于所述平移座 31上， 并在平移座 31上沿 Y向及 向 (即绕 Z向的旋转）运动； 所述伸缩机构 33 的一端安装于所述转动座 32上， 并在转动座 32上沿 Z向伸缩； 所述支撑椅座 34固定于所述伸缩机构 33的另一端，以实现病人身体在各个方向的调整；所述椅背 35、腿部支撑 36、 手臂支撑 37和肩部支撑 38分别安装于所述支撑椅座 34上并组成靠椅， 较佳 地， 所述椅背 35、 腿部支撑 36、 手臂支撑 37和肩部支撑 38分别与所述支撑 椅座 34旋转连接， 对应支撑病人各身体部位， 通过对肢体的牵引力控制， 使 待成像部位能够展现病灶的情况。
请参考图 3-4, 分别为采用本发明的核磁共振成像系统进行下肢成像和上 肢成像的使用状态示意图。 具体使用方法如下， 其步骤包括：
S1 : 病人躺靠在所述转椅单元 30上；
S2: 操作人员根据需要控制所述转椅单元 30变换位置和角度， 将病人身 体待成像部位抬送至所述主磁场空间 210 内。 例如， 当需要对病人的下肢进 行成像时， 可以通过调节支撑椅座 34的水平位置和垂直高度、 椅背 35的角 度、 腿部支撑 36的位置和角度中的一个或多个来将病人的下肢抬送至主磁场 空间 210 内； 类似的， 当需要对病人的上肢进行成像时， 也可以通过调节支 撑椅座 34、 椅背 35、 手臂支撑 37和肩部支撑 38中的一个或多个来将病人的 上肢抬送至主磁场空间 210 内； 进行肢关节成像时， 也可同时控制所述负力 机构 24的位置和负力；
S3: 对病人身体待成像部位进行核磁共振成像；
S4: 转椅单元 30回复至初始位置， 当然， 若负力机构 24伸出的情况下， 负力机构 24也回复至初始位置， 核磁共振成像完成。
采用本发明的核磁共振成像系统， 无需病人长时间保持同样的姿势进行 检查， 转椅单元 30的角度和位置变化帮助病人达到合适的体位， 进行核磁共 振成像。
综上所述， 本发明提供的核磁共振成像系统及其使用方法， 该系统包括 底座 10、 安装于所述底座 10上的磁体单元 20和转椅单元 30, 所述磁体单元 20提供一个主磁场空间 210, 病人躺靠在所述转椅单元 30上， 所述转椅单元 30将病人身体待成像部位抬送至所述主磁场空间 210内。 本发明利用底座 10 将磁体单元 20和转椅单元 30的初始相对位置固定， 当需要对病人身体上的 某个待成像部位进行核磁共振检测时， 只需控制所述转椅单元 30调整其角度 和位置， 即可调节躺靠在所述转椅单元 30上的病人的姿态， 配合操作人员将 病人身体待成像部位抬送至所述主磁场空间 210 内， 一方面提供病人较大的 自由活动空间， 避免产生幽闭恐惧， 一方面灵活、 准确地将病人身体待成像 部位抬送至所述主磁场空间内， 便于核磁共振成像的完成。
显然， 本领域的技术人员可以对发明进行各种改动和变型而不脱离本发 明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要求 及其等同技术的范围之内， 则本发明也意图包括这些改动和变型在内。

Claims

权利要求
1. 一种核磁共振成像系统， 其特征在于， 包括：
底座；
磁体单元， 安装于所述底座的一端， 所述磁体单元提供一个主磁场空间； 以及
转椅单元，安装于所述底座的另一端，且可相对于所述磁体单元作平移和 /或旋转， 所述转椅单元用于将躺靠在其上的一病人的待成像身体部位抬送至 所述主磁场空间内。
2. 如权利要求 1所述的核磁共振成像系统， 其特征在于， 所述磁体单元 包括主磁体、 支撑立柱以及支撑脚， 所述支撑脚固定于所述底座上， 所述支 撑立柱的一端固定于所述支撑脚上， 另一端与所述主磁体铰接， 所述主磁体 内提供所述主磁场空间。
3. 如权利要求 2所述的核磁共振成像系统， 其特征在于， 所述磁体单元 还设有一可抬降的负力机构， 所述负力机构的一端与所述支撑立柱的上端铰 接。
4. 如权利要求 3所述的核磁共振成像系统， 其特征在于， 所述主磁体的 外侧还设有操作面板， 所述操作面板通过电气连接或无线连接方式与所述转 椅单元和负力机构相连。
5. 如权利要求 1所述的核磁共振成像系统， 其特征在于， 所述转椅单元 包括平移座、 转动座、 伸缩机构、 支撑椅座、 椅背、 腿部支撑、 手臂支撑以 及肩部支撑， 所述平移座安装于所述底座上， 并在底座上沿 X向运动； 所述 转动座安装于所述平移座上， 并在平移座上沿 Y向及 Rz向运动； 所述伸缩机 构的一端安装于所述转动座上， 并在转动座上沿 Z向伸缩； 所述支撑椅座固 定于所述伸缩机构的另一端； 所述椅背、 腿部支撑、 手臂支撑和肩部支撑分 别安装于所述支撑椅座上并组成靠椅， 对应支撑病人各身体部位， 其中， X 向、 Y向和 Z向两两正交， Rz向表示绕 Z向旋转。
6. 如权利要求 5所述的核磁共振成像系统， 其特征在于， 所述椅背、 腿 部支撑、 手臂支撑和肩部支撑分别与所述支撑椅座旋转连接。
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