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公开(公告)号：US20060273793A1
公开(公告)日：2006-12-07
申请号：US10557757
申请日：2004-05-17
IPC分类号： G01V3/00
CPC分类号： G01R33/3854
摘要： The invention provides a magnetic resonance imaging (MRI) device (21), comprising a diagnostic space (25), a main magnetic system (22) for generating a main magnetic field in said diagnostic space, a gradient magnetic coil system (23) comprising a gradient coil for generating at least one gradient of the main magnetic field, and noise reducing means (29, 32) for reducing noise that is generated as a result of vibrations of the gradient coil. The noise reducing means comprise a sound-absorbing panel (29) disposed between the gradient coil and the diagnostic space. The sound-absorbing panel (29) comprises channels having an open end and a closed end.
摘要翻译： 本发明提供一种磁共振成像（MRI）装置（21），包括诊断空间（25），用于在所述诊断空间中产生主磁场的主磁系统（22），梯度磁线圈系统（23），包括 用于产生主磁场的至少一个梯度的梯度线圈，以及用于降低由于梯度线圈的振动而产生的噪声的降噪装置（29,32）。 降噪装置包括设置在梯度线圈和诊断空间之间的吸音板（29）。 吸声板（29）包括具有开口端和封闭端的通道。
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公开(公告)号：US20070080689A1
公开(公告)日：2007-04-12
申请号：US10595921
申请日：2004-11-17
申请人： Jan Konijn , Cornelis Leonardus Ham
发明人： Jan Konijn , Cornelis Leonardus Ham
IPC分类号： G01V3/00
CPC分类号： F16F15/02 , F16F2222/02 , F16F2222/025 , G01R33/3854 , G01R33/3856
摘要： The invention relates to a magnetic resonance imaging (MRI) system comprising a main magnet system for generating a main magnetic field in an examination volume, a gradient coil system (1) which is substantially arranged between the main magnet system and the examination volume and which comprises sub-gradient coils (4,5,6) embedded in a binding material (11) having a glass temperature, control means (13) for controlling a temperature of the gradient coil system, and temperature-influencing means for influencing the temperature of the gradient coil system on the basis of control signals supplied by the control means. The control means are suitable to control, during operation of the MRI system, the temperature of the binding material of the gradient coil system to a value above the glass temperature. The invention further relates to a method of using a magnetic resonance imaging (MRI) system.
摘要翻译： 本发明涉及一种磁共振成像（MRI）系统，其包括用于在检查体积中产生主磁场的主磁体系统，基本上布置在主磁体系统和检查体积之间的梯度线圈系统（1） 包括嵌入具有玻璃温度的粘合材料（11）中的次级梯度线圈（4,5,6），用于控制梯度线圈系统的温度的控制装置（13）和用于影响梯度线圈系统的温度的温度影响装置 该梯度线圈系统基于由控制装置提供的控制信号。 控制装置适合于在MRI系统的操作期间将梯度线圈系统的装订材料的温度控制到高于玻璃温度的值。 本发明还涉及使用磁共振成像（MRI）系统的方法。
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公开(公告)号：US20050068032A1
公开(公告)日：2005-03-31
申请号：US10498198
申请日：2002-11-20
IPC分类号： G01R33/385 , A61B5/055 , G01R33/38 , G01R33/3815 , G01V3/00
CPC分类号： G01R33/3806 , G01R33/385 , G01R33/3856
摘要： The invention relates to an open magnetic resonance imaging (MRI) magnet system (1) for use in a medical imaging system. The open MRI magnet system has two main coil units which are accomodated, at some distance from each other, in a first housing (2) and in a second housing (3), respectively. Between the two housings, an imaging volume (6) is present wherein a patient to be examined is placed. A gradient coil unit (9, 10) facing the imaging volume is present near a side of each of the two housings. Functional connections of the gradient coil units (9, 10), such as electrical power supply lines (13, 14) and cooling channels (15, 16) are provided in a central passage (4, 5) which is present in each of the two housings. As a result, these functional connections do not reduce the space in the imaging volume available for the patient. The central passages and the electrical power supply lines provided therein are parallel to the direction of the main magnetic field of the open MRI magnet system, so that the Lorentz forces exerted on the power lines are limited.
摘要翻译： 本发明涉及用于医学成像系统的开放磁共振成像（MRI）磁体系统（1）。 开放MRI磁体系统具有分别在第一壳体（2）和第二壳体（3）中彼此相隔一定距离的两个主线圈单元。 在两个壳体之间，存在成像体积（6），其中放置待检查的患者。 面对成像体积的梯度线圈单元（9,10）存在于两个壳体中的每一个的侧面附近。 梯形线圈单元（9,10）的功能连接，例如电力供应线（13,14）和冷却通道（15,16）设置在中央通道（4,5）中，中心通道（4,5）存在于 两个外壳。 因此，这些功能连接不会减少可用于患者的成像体积的空间。 设置在其中的中央通道和电源线平行于开放式MRI磁体系统的主磁场的方向，使得施加在电力线上的洛伦兹力受到限制。
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公开(公告)号：US20050285594A1
公开(公告)日：2005-12-29
申请号：US10533991
申请日：2003-10-27
IPC分类号： G01R33/385 , G01V3/00
CPC分类号： G01R33/3854
摘要： The invention relates to a magnetic resonance imaging (MRI) system (1) comprising an examination volume (111), a main magnet system (13) for generating a main magnetic field (B0) in the examination volume in a Z-direction, a gradient magnet system (19) for generating gradients of the main magnetic field, and an anti-vibration system (33) for reducing vibrations of the gradient magnet system caused by a mechanical load (MX, MY) exerted on the gradient magnet system as a result of electromagnetic interaction between the main magnetic field and electrical currents in the gradient magnet system. According to the invention the anti-vibration system (33) comprises a balance member (39), which is coupled to the gradient magnet system (19) by means of an actuator system (51) and a coupling device (49) allowing displacements of the balance member relative to the gradient magnet system. The MRI system (1) also has a control system (81) which controls the actuator system in such a manner that the actuator system exerts upon the balance member a compensating mechanical load (MCX, MCY) which substantially corresponds to the mechanical load (MX, MY) exerted on the gradient magnet system. As a result, the actuator system exerts a mechanical reaction load (MRX, MRY) on the gradient magnet system which has the same magnitude as but is oppositely directed to the mechanical load (MX, MY) exerted on the gradient magnet system, so that vibrations of the gradient magnet system are effectively limited.
摘要翻译： 本发明涉及一种磁共振成像（MRI）系统（1），包括检查体积（111），用于在检查中产生主磁场（B
0）的主磁体系统（13） 在Z方向上的体积，用于产生主磁场梯度的梯度磁体系统（19）和用于减少由机械载荷引起的梯度磁体系统的振动的防振系统（33） 由于梯度磁体系统中的主磁场和电流之间的电磁相互作用，施加在梯度磁体系统上的X，Y，Y）。 根据本发明，防振系统（33）包括平衡构件（39），其通过致动器系统（51）和耦合装置（49）耦合到梯度磁体系统（19），耦合装置（49）允许位移 平衡构件相对于梯度磁体系统。 MRI系统（1）还具有控制系统（81），该控制系统（81）以致动器系统对平衡构件施加补偿机械载荷（M SUB，M -
公开(公告)号：US20050122106A1
公开(公告)日：2005-06-09
申请号：US10499175
申请日：2002-12-16
IPC分类号： A61B5/055 , G01R33/385 , H01F7/20 , G01V3/00
CPC分类号： G01R33/385
摘要： The invention relates to a gradient coil arrangement for the generation of a gradient magnetic field for an MR arrangement with at least two gradient coils arranged on a cylinder surface with a substantially circular cross section. In order to enable adjustment of gradient fields extending as linearly as possible in the area of an object to be examined without having to modify the entire mechanical structure of the MR arrangement and without having to increase the power required to feed the gradient coil arrangement, it is proposed according to the invention to configure the gradient coils so as to be asymmetrical in relation to a central plane lying horizontally through the longitudinal axis of the cylinder.
摘要翻译： 本发明涉及一种梯度线圈装置，用于产生具有布置在具有基本圆形横截面的圆柱体表面上的至少两个梯度线圈的MR布置的梯度磁场。 为了能够在不需要改变MR布置的整个机械结构并且不必增加馈送梯度线圈装置所需的功率的情况下，能够调整在待检查物体的区域中尽可能线性延伸的梯度场， 根据本发明提出了将梯度线圈配置成相对于水平地穿过圆柱体的纵向轴线的中心平面不对称。
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