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1. 发明申请

US20060279283A1 Magnetic resonance system with suppression of capacitive coupling between an RF source and the subject 有权
标题翻译：磁共振系统，抑制RF源与被摄体之间的电容耦合
公开(公告)号：US20060279283A1
公开(公告)日：2006-12-14
申请号：US11389476
申请日：2006-03-24
申请人： Jurgen Nistler , Markus Vester
发明人： Jurgen Nistler , Markus Vester
IPC分类号： G01V3/00
CPC分类号： G01R33/422 , G01R33/34007 , G01R33/34046 , G01R33/3657 , G01R33/385
摘要： An examination subject arranged in an examination volume of a magnetic resonance system can be excited to magnetic resonance by an RF transmission antenna. The RF transmission antenna is fashioned as a resonant structure that surrounds a central axis of the magnetic resonance system running within the examination volume. The resonance structure has inner edges proceeding around the central axis on its inner side facing the central axis, which inner edges form a capacitively-bridged annular gap extending parallel to the central axis. The RF transmission antenna is embedded into the gradient coil, such that the gradient coil at least radially outwardly and axially surrounds the RF transmission antenna), and the inner edges of the RF transmission antenna are connected in an electrically-conductive manner with inner sides of the gradient coil to the central axis. They are arranged radially inwardly (viewed from the annular gap) and axially completely cover the annular gap as well as axially at least partially cover the inner sides of the gradient coil.
摘要翻译：配置在磁共振系统的检查体积中的检查对象可以被RF发送天线激励到磁共振。 RF发射天线被形成为围绕在检查体积内运行的磁共振系统的中心轴线的谐振结构。谐振结构具有内边缘围绕中心轴线在其面向中心轴线的内侧上延伸，该内边缘形成平行于中心轴线延伸的电容桥接环形间隙。射频发射天线被嵌入到梯度线圈中，使得梯度线圈至少径向向外并且轴向地围绕RF发射天线），并且RF发射天线的内边缘以导电方式与梯度线圈到中心轴线。它们径向向内（从环形间隙看）并且轴向地完全覆盖环形间隙，并且轴向地至少部分地覆盖梯度线圈的内侧。

2. 发明申请

US20060038566A1 Magnetic resonance apparatus with an RF antenna unit and a gradient coil unit 有权
标题翻译：具有RF天线单元和梯度线圈单元的磁共振设备
公开(公告)号：US20060038566A1
公开(公告)日：2006-02-23
申请号：US11208185
申请日：2005-08-18
申请人： Ralph Kimmlingen , Razvan Lazar , Jurgen Nistler , Wolfgang Renz , Markus Vester
发明人： Ralph Kimmlingen , Razvan Lazar , Jurgen Nistler , Wolfgang Renz , Markus Vester
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/385 , G01R33/422
摘要： A magnetic resonance apparatus has an RF antenna unit, a gradient coil unit and an RF shield, the conductor structures of which are independent of one another. The RF shield is arranged between the RF antenna unit and the gradient coil unit, a first RF field return volume is arranged between RF the antenna unit (1, 29, 55A, and the gradient coil unit, the RF field return volume closes RF magnetic field lines of the RF antenna unit and is bordered by the RF shield on the side of the gradient coil unit. The conductor structure of the gradient coil unit occupies a first region. A second conductor-free region is within the first region, on the side facing the RF antenna unit, between a primary gradient coil unit and a secondary shim gradient coil unit of the gradient coil unit. The second conductor-free region is at least partially surrounded by the conductor structure of the gradient coil unit and is fashioned as a second RF field return volume in connection with the first RF field return volume. The RF shield proceeds between the RF field return volumes and the conductor structure of the gradient coil unit. The RF antenna unit is closer to the data acquisition region of the magnetic resonance apparatus than the gradient coil unit.
摘要翻译：磁共振装置具有RF天线单元，梯度线圈单元和RF屏蔽，其导体结构彼此独立。 RF屏蔽设置在RF天线单元和梯度线圈单元之间，RF天线单元（1,29,55A和梯度线圈单元之间）之间布置第一RF场返回音量，RF场返回音量关闭RF RF天线单元的磁场线，并且由梯形线圈单元侧的RF屏蔽界定，梯度线圈单元的导体结构占据第一区域，第二无导体区域在第一区域内，在面向RF天线单元的一侧，梯度线圈单元的主梯度线圈单元和次级斜面梯形线圈单元之间，第二无导体区域至少部分地被梯度线圈单元的导体结构包围，并被形成作为与第一RF场返回体积相关的第二RF场返回体积，RF屏蔽在RF场返回体积和梯度线圈单元的导体结构之间进行，RF天线单元更靠近 e数据采集区域比梯形线圈单元。

3. 发明申请

US20050030031A1 Magnetic resonance apparatus having a hollow interior with a gradient coil disposed therein 失效
标题翻译：具有设置在其中的具有梯度线圈的中空内部的磁共振装置
公开(公告)号：US20050030031A1
公开(公告)日：2005-02-10
申请号：US10910893
申请日：2004-08-04
申请人： Jurgen Nistler , Stefan Stocker , Markus Vester
发明人： Jurgen Nistler , Stefan Stocker , Markus Vester
IPC分类号： G01R33/385 , G01R33/422 , G01V3/00
CPC分类号： G01R33/422 , G01R33/3854
摘要： A magnetic resonance apparatus with a hollow interior and with a gradient coil system disposed in the hollow interior, wherein the hollow interior exhibits a barrel-like bulge, the gradient coil system is essentially enclosed by a radio-frequency shield, and he radio-frequency shield is fashioned free of a slotting in regions in which it, with regard to a boundary of the hollow interior is at a shorter distance compared with a middle region of the bulge.
摘要翻译：具有中空内部并具有设置在中空内部的梯度线圈系统的磁共振装置，其中中空内表面呈筒状凸起，该梯度线圈系统基本上被射频屏蔽封闭，并且其射频在与凸起的中间区域相比，中空内部的边界处于较短距离的区域中，护罩被制成没有开槽。

4. 发明申请

US20050099180A1 Generator for generating time-variable magnetic fields and magnetic resonance device 失效
标题翻译：用于产生时变磁场和磁共振装置的发电机
公开(公告)号：US20050099180A1
公开(公告)日：2005-05-12
申请号：US10957434
申请日：2004-10-01
申请人： Jurgen Nistler , Stefan Stocker , Markus Vester
发明人： Jurgen Nistler , Stefan Stocker , Markus Vester
IPC分类号： G01R33/34 , G01R33/422 , G01V3/00
CPC分类号： G01R33/385 , G01R33/34046 , G01R33/34076 , G01R33/422
摘要： A generator of time-variable magnetic fields in a magnetic resonance device with the following features: at least one gradient coil, the conductors of which extend essentially in the region of a hollow cylinder and which is configured free of conductors in a central region in respect of an axial extension of the hollow cylinder, a high-frequency screen, which essentially encloses the conductors of the gradient coil leaving free the central region, parts of a high-frequency antenna, which are arranged in the central region, and a coaxial connecting cable associated with the high-frequency antenna, which punctures the high-frequency screen at at least two points, penetrating the generator essentially axially.
摘要翻译：具有以下特征的磁共振装置中的时变磁场的发生器：至少一个梯度线圈，其导体基本上在中空圆柱体的区域中延伸，并且在中心区域中被构造为没有导体中空圆柱体的轴向延伸的高频屏幕，其基本上包围梯度线圈的导体，释放中心区域，布置在中心区域中的高频天线的部分和同轴连接与高频天线相关联的电缆，其在至少两点穿刺高频屏幕，基本上轴向穿透发生器。

5. 发明申请

US20050206381A1 Time-varying magnetic fields generator for a magnetic resonance apparatus 失效
标题翻译：用于磁共振设备的时变磁场发生器
公开(公告)号：US20050206381A1
公开(公告)日：2005-09-22
申请号：US10909517
申请日：2004-08-02
申请人： Jurgen Nistler , Stefan Stocker , Markus Vester
发明人： Jurgen Nistler , Stefan Stocker , Markus Vester
IPC分类号： G01R33/34 , G01R33/385 , G01R33/3873 , G01R33/422 , G01V3/00
CPC分类号： G01R33/34046 , G01R33/34076 , G01R33/385 , G01R33/3873 , G01R33/422
摘要： A time-varying magnetic fields generator for a magnetic resonance apparatus has at least one gradient coil and one radio-frequency antenna, gradient coil being formed by two essentially hollow-cylindrical units that are axially separated from one another and that contain conductors of the gradient coil, and that each have at least one axial free space proceeding therethrough to accommodate a shim device, and at least one hollow conductor of the radio-frequency antenna is disposed between the units such that its hollow interior axially communicates with and continues at least one of the free spaces.
摘要翻译：用于磁共振装置的时变磁场发生器具有至少一个梯度线圈和一个射频天线，梯形线圈由两个基本上为中空的圆柱形单元形成，它们彼此轴向分离并且包含梯度的导体线圈，并且每个具有至少一个轴向自由空间进入其中以容纳垫片装置，并且所述射频天线的至少一个空心导体设置在所述单元之间，使得其中空内部轴向连通并且继续至少一个的自由空间。

6. 发明申请

US20050174115A1 Magnetic resonance system 有权
标题翻译：磁共振系统
公开(公告)号：US20050174115A1
公开(公告)日：2005-08-11
申请号：US10514388
申请日：2003-05-06
申请人： Razvan Lazar , Jurgen Nistler , Wolfgang Renz , Markus Vester
发明人： Razvan Lazar , Jurgen Nistler , Wolfgang Renz , Markus Vester
IPC分类号： G01R33/36 , A61B5/055 , G01R33/34 , G01R33/3415 , G01V3/00
CPC分类号： G01R33/3415 , G01R33/34046 , G01R33/3642 , G01R33/365 , G01R33/5659
摘要： A magnetic resonance system has a primary RF transmitting antenna and at least one secondary RF transmitting antenna. Both antennas generate RF excitation fields in an examination volume. At least one of the primary and secondary transmitting antennas has a control element connected thereto, which allows an amplitude ratio and/or a phase difference of the respective excitation currents in the antennas to be set by a control and evaluation device. The control and evaluation device causes the excitation current in the secondary transmitting antenna to have a smaller amplitude than the excitation current in the primary transmitting antenna, so that the excitation field generated by the secondary transmitting antenna has a smaller spatial extent in the examination volume than the excitation field generated by the primary transmitting antenna.
摘要翻译：磁共振系统具有主RF发射天线和至少一个次RF发射天线。两个天线在检查体积中产生RF激励场。主发射天线和次发射天线中的至少一个具有连接到其上的控制元件，这允许通过控制和评估装置设置天线中的相应激励电流的振幅比和/或相位差。控制和评估装置使得次级发射天线中的激励电流具有比主发射天线中的激励电流更小的振幅，使得由次发射天线产生的激励场在检查体积中具有较小的空间范围，由主发射天线产生的激励场。

7. 发明申请

US20050099183A1 Generator of time-variable magnetic fields of a magnetic resonance device and magnetic resonance device 有权
标题翻译：磁共振装置和磁共振装置的时变磁场发生器
公开(公告)号：US20050099183A1
公开(公告)日：2005-05-12
申请号：US10984636
申请日：2004-11-09
申请人： Oliver Heid , Jurgen Nistler , Markus Vester
发明人： Oliver Heid , Jurgen Nistler , Markus Vester
IPC分类号： G01R33/422 , A61B5/055 , G01R33/34 , G01R33/385 , G01R33/421 , G01V3/00
CPC分类号： G01R33/385 , G01R33/34046 , G01R33/4215 , G01R33/422
摘要： A generator of time-variable magnetic fields of a magnetic resonance device having an examination space for registering at least one area to be examined of an item being examined has the following features: the conductors of a gradient coil arrangement of the generator define an area at least partially surrounding the examination space, said area contains at least a partial area which is free from conductors of the gradient coil arrangement and which contains conductors of a radio frequency antenna of the generator, and a field flowback space, inter alia for fields of the radio frequency antenna, extends proceeding from the partial area away from the examination space and is delimited beyond said partial area by a radio frequency shield.
摘要翻译：具有检查空间的磁共振装置的时变磁场发生器具有以下特征：发电机的梯度线圈装置的导体限定了被检查物品的至少一个区域的面积至少部分地围绕检查空间，所述区域包含至少部分区域，其不含梯度线圈装置的导体并且包含发生器的射频天线的导体，以及场回流空间，尤其用于无线电频率天线从部分区域延伸出远离检查空间，并通过射频屏蔽限定在所述部分区域之外。

8. 发明申请

US20050073311A1 Magnetic resonance device 失效
标题翻译：磁共振装置
公开(公告)号：US20050073311A1
公开(公告)日：2005-04-07
申请号：US10957435
申请日：2004-10-01
申请人： Jurgen Nistler , Stefan Stocker , Markus Vester
发明人： Jurgen Nistler , Stefan Stocker , Markus Vester
IPC分类号： G01R33/34 , G01R33/385 , G01R33/565 , G01V3/00
CPC分类号： G01R33/34046 , G01R33/34076 , G01R33/385 , G01R33/56518
摘要： A magnetic resonance device with a cavity and with a basic field magnet and a gradient coil system, with the basic field magnet having a cavity that is bounded by an electrically conductive boundary surface of the basic field magnet and in which the gradient coil system is arranged, containing the following features: the gradient coil system has at least two structurally separate units with a clearance between them, with each of the units being enclosed by the high-frequency shield; the high-frequency shield has a short clearance from the boundary surface such that, because of the capacitive coupling between the high-frequency shield and the boundary surface, the high-frequency shield has a high-frequency short circuit to the boundary surface, so that the boundary surface is a surface that is always available for the high -frequency return flow.
摘要翻译：一种具有空腔并具有基本场磁体和梯度线圈系统的磁共振装置，其中基本场磁体具有由基本场磁体的导电边界面界定的空腔，其中布置有梯度线圈系统包含以下特征：梯度线圈系统具有至少两个结构上分离的单元，它们之间具有间隙，每个单元由高频屏蔽包围; 高频屏蔽与边界面间隔很短，由于高频屏蔽与边界面之间的电容耦合，高频屏蔽层与边界面有高频短路，所以边界面是始终可用于高频回流的表面。

9. 发明授权

US10663543B2 Device and method for recovering a temporal reference in free-running MR receive chains 有权
公开(公告)号：US10663543B2
公开(公告)日：2020-05-26
申请号：US15951156
申请日：2018-04-11
申请人： Stephan Biber , Jan Bollenbeck , Sven Heggen , Martin Nisznansky , Markus Vester
发明人： Stephan Biber , Jan Bollenbeck , Sven Heggen , Martin Nisznansky , Markus Vester
IPC分类号： G01V3/00 , G01R33/36 , G01R33/3415
摘要： A device for recovering a temporal reference in a free-running magnetic resonance tomography (MRT) receive chain includes a time reference encoder and a time reference decoder. The time reference encoder is configured to generate a modulation signal as a function of a reference clock, where the modulation signal is configured for a correlation with a temporal resolution less than a maximum predetermined phase deviation and a maximum that may clearly be identified. The time reference decoder is configured to receive, via the first signal input, a receive signal as a function of the modulation signal, perform a correlation with a reference signal, and generate a signal as a function of a temporal reference of the modulation signal in the receive signal in relation to the reference signal.

10. 发明授权

US10295624B2 Decoupling of parallel transmission arrays in magnetic resonance imaging 有权
公开(公告)号：US10295624B2
公开(公告)日：2019-05-21
申请号：US13918461
申请日：2013-06-14
申请人： Elfar Adalsteinsson , Luca Daniel , Bastien Guerin , Zohaib Mahmood , Markus Vester , Lawrence Wald
发明人： Elfar Adalsteinsson , Luca Daniel , Bastien Guerin , Zohaib Mahmood , Markus Vester , Lawrence Wald
IPC分类号： G01V3/00 , G01R33/36 , G01R33/561
摘要： A method of determining a decoupling matrix of a decoupling system for an array of coils of a parallel transmission magnetic resonance imaging (MRI) system includes obtaining impedance matrix data for the array of coils without the decoupling system, determining, based on the impedance matrix data for the array of coils, an objective function representative of deviation from a decoupled operating condition for the array of coils in which the array of coils are decoupled via the decoupling system, and defining, with a processor, a decoupling matrix representative of a set of impedances of the decoupling system with an iterative procedure that optimizes elements of the decoupling matrix to minimize the objective function and reach the decoupled operating condition.

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