公开(公告)号：US06466812B1

公开(公告)日：2002-10-15

申请号：US09517715

申请日：2000-03-02

申请人： Johannes A. Overweg ,  Christoph G. Leussler

发明人： Johannes A. Overweg ,  Christoph G. Leussler

IPC分类号： A61B5055

CPC分类号： G01R33/381 ,  G01R33/62

摘要： The invention relates to an MR method in which the nuclear magnetization is enhanced under the influence of a first steady magnetic field and a second steady magnetic field acts on the nuclei previously influenced by the first magnetic field. According to the invention, the two magnetic fields overlap in time and enclose an angle other than 0° relative to one another, the angle preferably amounting to 90°. The enhanced nuclear magnetization is then sustained after the activation of the first steady magnetic field while the direction of the nuclear magnetization is determined by the second steady magnetic field. The use of two mutually perpendicular magnetic fields is advantageous notably for Overhauser imaging methods, because it enables the use of mutually perpendicular RF fields for the ESR saturation and the MR excitation, thus uncoupling the coils generating such RF fields from one another.

摘要翻译： 本发明涉及一种MR方法，其中核磁化在第一稳定磁场的影响下增强，第二稳定磁场作用在先前受第一磁场影响的核上。 根据本发明，两个磁场在时间上重叠并且相对于彼此包围0°以外的角度，该角度优选为90°。 然后在第一稳定磁场激活之后维持增强的核磁化，而核磁化的方向由第二稳定磁场确定。 两个相互垂直的磁场的使用特别适用于Overhauser成像方法，因为它能够使用相互垂直的RF场用于ESR饱和和MR激励，从而使产生这种RF场的线圈彼此分离。

公开(公告)号：US5500594A

公开(公告)日：1996-03-19

申请号：US954948

申请日：1992-09-30

申请人： Christoph G. Leussler

发明人： Christoph G. Leussler

IPC分类号： G01R33/32 ,  A61B5/055 ,  G01R33/34 ,  G01R33/341 ,  G01R33/28

CPC分类号： G01R33/3678 ,  G01R33/34053

摘要： As rf quadrature coil system for a magnetic resonance examination apparatus, comprises two similar rf coils connected to an rf receiver and/or an rf transmitter and arranged so as to be offset 90.degree. with respect to one another. Each rf coil comprises several turns which are situated in mutually parallel planes. The planes of the turns of one rf coil extend perpendicular to the planes of the turns of the other rf coil. The quadrature coil system can be used in magnetic resonance examination apparatus in which the uniform, steady magnetic field required for the examination extends perpendicular to the longitudinal axis of the patient to be examined.

摘要翻译： 作为用于磁共振检查装置的rf正交线圈系统，包括连接到rf接收器和/或rf发送器的两个相似的rf线圈，并且被布置为相对于彼此偏移90°。 每个rf线圈包括位于相互平行的平面中的几匝。 一个rf线圈的匝的平面垂直于另一个rf线圈的匝的平面延伸。 正交线圈系统可用于磁共振检查装置，其中检查所需的均匀的稳定磁场垂直于要检查的患者的纵向轴线延伸。

公开(公告)号：US07633294B2

公开(公告)日：2009-12-15

申请号：US11913487

申请日：2006-04-19

申请人： Christoph G. Leussler ,  Kai-Michael Luedeke ,  Michael A. Morich ,  Zhiyong Zhai ,  Gordon D. DeMeester

发明人： Christoph G. Leussler ,  Kai-Michael Luedeke ,  Michael A. Morich ,  Zhiyong Zhai ,  Gordon D. DeMeester

IPC分类号： G01V3/00

CPC分类号： G01R33/422 ,  G01R33/3628

摘要： A radio frequency coil for magnetic resonance imaging includes an active coil member (70, 701, 170, 270) that defines an imaging volume. The active coil member has a first open end (74) with a first cross-sectional dimension (dactive). A shield coil member (72, 721, 722, 723, 724, 725, 172, 1722, 272) substantially surrounds the active coil member. The shield coil member has a constricted open end (88) arranged proximate to the first open end of the active coil member with a constricted cross-sectional dimension (dconst) that is less than the cross-sectional dimension (dShieid) of the shield coil member. In some embodiments, the radio frequency coil further includes an outer shield coil member (100) that is substantially larger than the shield coil member (72, 721, 722, 723, 724, 725, 172, 1722, 272), and surrounds both the active coil member and the shield coil member.

摘要翻译： 用于磁共振成像的射频线圈包括限定成像体积的有源线圈构件（70,701,170,270）。 有源线圈构件具有第一横截面尺寸（dactive）的第一开口端（74）。 屏蔽线圈构件（72,72,722,723,724,725,172,1722,272）基本上围绕有源线圈构件。 屏蔽线圈构件具有靠近有源线圈构件的第一开口端布置的收缩的开口端（88），其缩小的横截面尺寸（dconst）小于屏蔽线圈的横截面尺寸（dShid） 会员。 在一些实施例中，射频线圈进一步包括外屏蔽线圈构件（100），其大致大于屏蔽线圈构件（72,72,722,723,724,725,172,1722,272），并且包围两者 有源线圈构件和屏蔽线圈构件。

公开(公告)号：US20080129294A1

公开(公告)日：2008-06-05

申请号：US11814115

申请日：2006-01-05

申请人： Christoph G. Leussler

发明人： Christoph G. Leussler

IPC分类号： G01R33/34

CPC分类号： G01R33/34046 ,  G01R33/34053

摘要： A radio frequency coil assembly (32) for magnetic resonance imaging includes a coil array portion (60, 60′, 88) and a TEM coil portion (62, 62′). The coil array portion includes a plurality of decoupled coil loops (70, 70′, 90). The TEM coil portion includes a plurality of rods (72, 72′) coupled with a radio frequency screen (34, 34′). Each rod of the TEM coil portion is electromagnetically orthogonal to a corresponding coil loop of the coil array portion.

摘要翻译： 用于磁共振成像的射频线圈组件（32）包括线圈阵列部分（60,60'，88）和TEM线圈部分（62,62'）。 线圈阵列部分包括多个解耦的线圈环（70,70'，90）。 TEM线圈部分包括与射频屏幕（34,34'）耦合的多个杆（72,72'）。 TEM线圈部分的每个杆与线圈阵列部分的相应线圈环电磁正交。

公开(公告)号：US07538552B2

公开(公告)日：2009-05-26

申请号：US11814115

申请日：2006-01-05

申请人： Christoph G. Leussler

发明人： Christoph G. Leussler

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/34053

摘要： A radio frequency coil assembly (32) for magnetic resonance imaging includes a coil array portion (60, 60′, 88) and a TEM coil portion (62, 62′). The coil array portion includes a plurality of decoupled coil loops (70, 70′, 90). The TEM coil portion includes a plurality of rods (72, 72′) coupled with a radio frequency screen (34, 34′). Each rod of the TEM coil portion is electromagnetically orthogonal to a corresponding coil loop of the coil array portion.

摘要翻译： 用于磁共振成像的射频线圈组件（32）包括线圈阵列部分（60,60'，88）和TEM线圈部分（62,62'）。 线圈阵列部分包括多个解耦的线圈环（70,70'，90）。 TEM线圈部分包括与射频屏幕（34,34'）耦合的多个杆（72,72'）。 TEM线圈部分的每个杆与线圈阵列部分的相应线圈环电磁正交。

公开(公告)号：US20080129292A1

公开(公告)日：2008-06-05

申请号：US10595862

申请日：2004-11-03

申请人： Christoph G. Leussler ,  Christian Findeklee ,  Michael A. Morich ,  Zhiyong Zhai ,  Gordon D. DeMeester

发明人： Christoph G. Leussler ,  Christian Findeklee ,  Michael A. Morich ,  Zhiyong Zhai ,  Gordon D. DeMeester

IPC分类号： G01R33/422 ,  G01R33/34

CPC分类号： G01R33/3415 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/345 ,  G01R33/3453 ,  G01R33/3635 ,  G01R33/3642 ,  G01R33/365 ,  G01R33/3678 ,  G01R33/422 ,  G01R33/5659

摘要： A radio frequency coil system (38) for magnetic resonance imaging includes a plurality of parallel spaced apart rungs (60) which each includes rung capacitors (68). An end cap (64) is disposed at a closed end (66) of the coil system (38). An RF shield (62) is connected to the end cap (64) and surrounds the rungs (60), extending in a direction substantially parallel to rungs (60). The RF coil system (38) may be used as birdcage, TEM, hybrid, combination birdcage and TEM, or other.

摘要翻译： 一种用于磁共振成像的射频线圈系统（38）包括多个平行隔开的梯级（60），每个梯级包括梯级电容器（68）。 端盖（64）设置在线圈系统（38）的封闭端（66）处。 RF屏蔽（62）连接到端盖（64）并且围绕梯级（60）沿着基本平行于梯级（60）的方向延伸。 RF线圈系统（38）可以用作鸟笼，TEM，混合，组合鸟笼和TEM等。

公开(公告)号：US20080284435A1

公开(公告)日：2008-11-20

申请号：US10595956

申请日：2004-11-16

申请人： Johannes Overweg ,  Peter Mazurkewitz ,  Christoph G. Leussler

发明人： Johannes Overweg ,  Peter Mazurkewitz ,  Christoph G. Leussler

IPC分类号： G01R33/341

CPC分类号： G01R33/341 ,  G01R33/34007 ,  G01R33/3415

摘要： A magnetic resonance imaging system includes main magnet (20) that produces a substantially spatially and temporally constant main magnetic field within a field of view. Magnetic field gradient coils (30) impose selected magnetic field gradients on the main magnetic field within the field of view. At least one radio frequency coil (44, 44′, 44″, 144, 154) is arranged to detect a magnetic resonance signal induced by an applied radio frequency pulse. The at least one radio frequency coil includes a radio frequency antenna (90) and electronics module (78, 78′) disposed on a substrate (72). The electronics are electrically connected with the radio frequency antenna (90). The electronics are mounted in a centered region (96) surrounded by the radio frequency antenna.

摘要翻译： 磁共振成像系统包括主磁体（20），其在视场内产生基本空间和时间上恒定的主磁场。 磁场梯度线圈（30）在视野内的主磁场上施加选定的磁场梯度。 至少一个射频线圈（44,44'，44“，144,154）被布置成检测由施加的射频脉冲引起的磁共振信号。 所述至少一个射频线圈包括设置在基板（72）上的射频天线（90）和电子模块（78,78'）。 电子设备与射频天线（90）电连接。 电子装置安装在由射频天线包围的中心区域（96）中。

公开(公告)号：US20080186026A1

公开(公告)日：2008-08-07

申请号：US11913487

申请日：2006-04-19

申请人： Christoph G. Leussler ,  Kai-Michael Luedeke ,  Michael A. Morich ,  Zhiyong Zhai ,  Gordon D. DeMeester

发明人： Christoph G. Leussler ,  Kai-Michael Luedeke ,  Michael A. Morich ,  Zhiyong Zhai ,  Gordon D. DeMeester

IPC分类号： G01R33/422

CPC分类号： G01R33/422 ,  G01R33/3628

摘要： A radio frequency coil for magnetic resonance imaging includes an active coil member (70, 701, 170, 270) that defines an imaging volume. The active coil member has a first open end (74) with a first cross-sectional dimension (dactive). A shield coil member (72, 721, 722, 723, 724, 725, 172, 1722, 272) substantially surrounds the active coil member. The shield coil member has a constricted open end (88) arranged proximate to the first open end of the active coil member with a constricted cross-sectional dimension (dconst) that is less than the cross-sectional dimension (dShieid) of the shield coil member In some embodiments, the radio frequency coil further includes an outer shield coil member (100) that is substantially larger than the shield coil member (72, 721, 722, 723, 724, 725, 172, 1722, 272), and surrounds both the active coil member and the shield coil member.

摘要翻译： 用于磁共振成像的射频线圈包括限定成像体积的有源线圈构件（70,70A，170,270）。 有源线圈构件具有第一横截面尺寸（dactive）的第一开口端（74）。 屏蔽线圈构件（72,72，...，72，72，72，72，SUB） 大致围绕有源线圈构件。 屏蔽线圈构件具有靠近有源线圈构件的第一开口端布置的收缩的开口端（88），其缩小的横截面尺寸（dconst）小于屏蔽线圈的横截面尺寸（dShid） 在一些实施例中，射频线圈还包括外屏蔽线圈构件（100），该屏蔽线圈构件（100）基本上大于屏蔽线圈构件（72,72，...，72 < ，72个3，72个，72个，172个，172个，272个），并且包围两个 有源线圈构件和屏蔽线圈构件。

公开(公告)号：US07345481B2

公开(公告)日：2008-03-18

申请号：US10595861

申请日：2004-11-03

申请人： Christoph G. Leussler

发明人： Christoph G. Leussler

IPC分类号： G01V3/00

CPC分类号： G01R33/34046

摘要： A radio frequency coil for a magnetic resonance imaging system includes a birdcage section having a plurality of parallel spaced apart conductors and one or more cross or end conductors aligned generally transverse to the spaced apart conductors, and a TEM section having a plurality of parallel spaced apart conductors and a radio frequency screen. The birdcage section and the TEM section resonate at a birdcage resonant frequency and a TEM resonant frequency, respectively. The birdcage section and the TEM section are relatively disposed with the parallel spaced apart conductors of each section aligned and define a subject receiving region.

摘要翻译： 用于磁共振成像系统的射频线圈包括具有多个平行隔开的导体和一个或多个横向于间隔开的导体排列的一个或多个横向或末端导体的鸟笼部分，以及具有多个平行隔开的TEM部分 导体和射频屏幕。 鸟笼部分和TEM部分分别以鸟笼共振频率和TEM共振频率共振。 鸟笼部分和TEM部分相对地布置，每个部分的平行隔开的导体对齐并限定对象接收区域。

公开(公告)号：US4998066A

公开(公告)日：1991-03-05

申请号：US366104

申请日：1989-06-13

申请人： Andreas H. W. Wichern ,  Christoph G. Leussler

发明人： Andreas H. W. Wichern ,  Christoph G. Leussler

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/341 ,  G01R33/36

CPC分类号： G01R33/365 ,  G01R33/3678

摘要： An MR examination apparatus has a quadrature coil arrangement which consists of two coil systems and a circuit for decoupling the two coil systems. In such an MR examination apparatus the decoupling between the coil systems is improved in that the circuit comprises a variable capacitor which connects one coil system to the other.

摘要翻译： MR检查装置具有由两个线圈系统和用于去耦两个线圈系统的电路组成的正交线圈装置。 在这种MR检查装置中，改善了线圈系统之间的去耦，因为电路包括将一个线圈系统连接到另一个线圈系统的可变电容器。