公开(公告)号：US20090256571A1

公开(公告)日：2009-10-15

申请号：US12101252

申请日：2008-04-11

申请人： Mark A. Griswold ,  Jeremiah Heilmann ,  Wolfgang Renz ,  Markus Vester

发明人： Mark A. Griswold ,  Jeremiah Heilmann ,  Wolfgang Renz ,  Markus Vester

IPC分类号： G01R33/28

CPC分类号： G01R33/3858 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/3614 ,  G01R33/385 ,  G01R33/4215

摘要： An arrangement for controlling an antenna arrangement in a magnetic resonance device has an antenna arrangement that surrounds an examination region and that has at least one antenna element for emitting an amplified transmit signal. At least one amplifier is provided, at the input of which a high-frequency transmit signal is connected, which is present on the output side of the amplifier as an amplified transmit signal. The amplifier is connected to a feed point of the antenna arrangement on the output side, in order to emit the amplified transmit signal. Coil windings of a primary gradient coil are also provided, which at least partially include the antenna arrangement and the examination region. Coil windings of a secondary gradient coil at least partially include the coil windings of the primary gradient coil, the antenna arrangement (and the examination region). The coil windings of the secondary gradient coil and the coil windings of the primary gradient coil are at a distance from one another, in which the at least one amplifier is arranged.

摘要翻译： 用于控制磁共振装置中的天线装置的装置具有围绕检查区域的天线装置，并且具有用于发射放大的发射信号的至少一个天线元件。 提供至少一个放大器，在其输入处连接有高频发射信号，其作为放大的发射信号存在于放大器的输出侧。 放大器连接到输出侧的天线装置的馈电点，以便发射放大的发射信号。 还提供了主梯度线圈的线圈绕组，其至少部分地包括天线装置和检查区域。 次级梯度线圈的线圈绕组至少部分地包括主梯度线圈的线圈绕组，天线装置（和检查区域）。 次级梯度线圈的线圈绕组和主梯度线圈的线圈绕组彼此间隔开，其中布置有至少一个放大器。

公开(公告)号：US07622927B2

公开(公告)日：2009-11-24

申请号：US12101252

申请日：2008-04-11

申请人： Mark A. Griswold ,  Jeremiah Heilmann ,  Wolfgang Renz ,  Markus Vester

发明人： Mark A. Griswold ,  Jeremiah Heilmann ,  Wolfgang Renz ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： G01R33/3858 ,  G01R33/34046 ,  G01R33/34076 ,  G01R33/3614 ,  G01R33/385 ,  G01R33/4215

摘要： An arrangement configured for controlling an antenna arrangement in a magnetic resonance device has an antenna arrangement that surrounds an examination region and that has at least one antenna element configured for emitting an amplified transmit signal. At least one amplifier is provided, at the input of which a high-frequency transmit signal is connected, which is present on the output side of the amplifier as an amplified transmit signal. The amplifier is connected to a feed point of the antenna arrangement on the output side, in order to emit the amplified transmit signal. Coil windings of a primary gradient coil are also provided, which at least partially include the antenna arrangement and the examination region. Coil windings of a secondary gradient coil at least partially include the coil windings of the primary gradient coil, the antenna arrangement (and the examination region). The coil windings of the secondary gradient coil and the coil windings of the primary gradient coil are at a distance from one another, and within that distance the at least one amplifier is arranged.

摘要翻译： 配置用于控制磁共振装置中的天线装置的装置具有围绕检查区域的天线装置，并且具有配置成发射放大的发射信号的至少一个天线元件。 提供至少一个放大器，在其输入处连接有高频发射信号，其作为放大的发射信号存在于放大器的输出侧。 放大器连接到输出侧的天线装置的馈电点，以便发射放大的发射信号。 还提供了主梯度线圈的线圈绕组，其至少部分地包括天线装置和检查区域。 次级梯度线圈的线圈绕组至少部分地包括主梯度线圈的线圈绕组，天线装置（和检查区域）。 次级梯度线圈的线圈绕组和主梯度线圈的线圈绕组彼此间隔一定距离，并且在该距离内布置至少一个放大器。

公开(公告)号：US20070102641A1

公开(公告)日：2007-05-10

申请号：US11532665

申请日：2006-09-18

申请人： Matthias Schmand ,  Ron Grazioso ,  Ronald Nutt ,  Robert Nutt ,  Nan Zhang ,  James Corbeil ,  Ralf Ladebeck ,  Markus Vester ,  Gunter Schnur ,  Wolfgang Renz ,  Hubertus Fischer ,  Bernd Pichler

发明人： Matthias Schmand ,  Ron Grazioso ,  Ronald Nutt ,  Robert Nutt ,  Nan Zhang ,  James Corbeil ,  Ralf Ladebeck ,  Markus Vester ,  Gunter Schnur ,  Wolfgang Renz ,  Hubertus Fischer ,  Bernd Pichler

IPC分类号： G01T1/164 ,  G01T1/166 ,  A61B5/05

CPC分类号： G01R33/481 ,  A61B6/037 ,  A61B8/5261 ,  G01R33/26 ,  G01R33/28 ,  G01R33/307 ,  G01R33/381 ,  G01T1/1603 ,  G01T1/2018 ,  G01T1/2985

摘要： APD-based PET modules are provided for use in combined PET/MR imaging. Each module includes a number of independent, optically isolated detectors. Each detector includes an array of scintillator (e.g. LSO) crystals read out by an array of APDs. The modules are positioned in the tunnel of a MR scanner. Simultaneous, artifact-free images can be acquired with the APD-based PET and MR system resulting in a high-resolution and cost-effective integrated PET/MR system.

摘要翻译： 提供基于APD的PET模块，用于组合PET / MR成像。 每个模块包括多个独立的光隔离探测器。 每个检测器包括由APD阵列读出的闪烁体阵列（例如LSO）晶体。 模块位于MR扫描仪的通道中。 基于APD的PET和MR系统可以获得同时，无伪影的图像，从而产生高分辨率和成本效益的集成PET / MR系统。

公开(公告)号：US20150061681A1

公开(公告)日：2015-03-05

申请号：US14468937

申请日：2014-08-26

申请人： Wolfgang Renz ,  Markus Vester

发明人： Wolfgang Renz ,  Markus Vester

IPC分类号： G01R33/36

CPC分类号： G01R33/36 ,  G01R33/288 ,  G01R33/3607 ,  G01R33/3635 ,  G01R33/3678

摘要： The embodiments relate to a method, a MRI device, and a circuit for an imaging magnetic resonance imaging device that includes at least one transmission coil for transmitting a magnetic field, where the circuit includes a hybrid coupler and at least one phase shifter that may be or are arranged in the transmission path between an amplifier and at least one transmission coil of the magnetic resonance imaging device.

摘要翻译： 实施例涉及一种用于成像磁共振成像装置的方法，MRI装置和电路，其包括用于传输磁场的至少一个传输线圈，其中电路包括混合耦合器和至少一个移相器 或者布置在放大器与磁共振成像装置的至少一个传输线圈之间的传输路径中。

公开(公告)号：US07847550B2

公开(公告)日：2010-12-07

申请号：US12353292

申请日：2009-01-14

申请人： Dirk Diehl ,  Juergen Nistler ,  Wolfgang Renz ,  Markus Vester ,  Sebastian Wolf

发明人： Dirk Diehl ,  Juergen Nistler ,  Wolfgang Renz ,  Markus Vester ,  Sebastian Wolf

IPC分类号： G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/288 ,  G01R33/5612 ,  G01R33/5659

摘要： A control device for a magnetic resonance system activates the coils of a transmission array and a gradient magnet system of the magnetic resonance system by causing an excitation pulse to be supplied to each coil. A magnetization that exhibits a first actual inhomogeneity thereby is generated in an excitation volume of the magnetic resonance system. The control device determines the excitation pulse for each coil using a start pulse and a maximum allowable inhomogeneity. The respective start pulse has a total time duration. When the control device activates the coils of the transmission array and of the gradient magnet system corresponding to the start pulse, a magnetization that exhibits a second actual inhomogeneity that is smaller than the maximum permissible inhomogeneity is generated in the excitation volume. The control device determines an intermediate point of the start pulse so that the respective start pulse is divided into a first pulse part and a second pulse part that is complementary to the first pulse part. The first pulse part corresponds to a respective low-energy portion of the start pulse, the second pulse part with a high-energy portion of the respective start pulse. The control device temporally extends the second pulse part and correspondingly compresses the second pulse part in terms of amplitude. The temporally extended and amplitude-compressed pulse part is used as the excitation pulse. The control device determines the intermediate point such that the first inhomogeneity is still smaller than the maximum allowable inhomogeneity.

摘要翻译： 用于磁共振系统的控制装置通过使激励脉冲提供给每个线圈来激活磁共振系统的传输阵列的线圈和梯度磁体系统。 在磁共振系统的激励体积中产生呈现出第一实际不均匀性的磁化。 控制装置使用起始脉冲和最大允许不均匀性来确定每个线圈的激励脉冲。 相应的起始脉冲具有总持续时间。 当控制装置激活与起始脉冲相对应的传输阵列和梯度磁体系统的线圈时，在激励体积中产生表现出小于最大允许不均匀性的第二实际不均匀性的磁化。 控制装置确定起始脉冲的中间点，使得各个起始脉冲被分成与第一脉冲部分互补的第一脉冲部分和第二脉冲部分。 第一脉冲部分对应于起始脉冲的相应低能部分，第二脉冲部分具有相应起始脉冲的高能部分。 控制装置暂时地延伸第二脉冲部分并相应地按照幅度压缩第二脉冲部分。 时间延长和幅度压缩的脉冲部分被用作激励脉冲。 控制装置确定中间点，使得第一不均匀性仍然小于最大允许不均匀性。

公开(公告)号：US07323874B2

公开(公告)日：2008-01-29

申请号：US11395251

申请日：2006-04-03

申请人： Robert Krieg ,  Rainer Kuth ,  Ralf Ladebeck ,  Ralph Oppelt ,  Wolfgang Renz ,  Sebastian Schmidt ,  Markus Vester

发明人： Robert Krieg ,  Rainer Kuth ,  Ralf Ladebeck ,  Ralph Oppelt ,  Wolfgang Renz ,  Sebastian Schmidt ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： G01R33/481 ,  G01T1/1603

摘要： A positron emission tomography unit (PET), having a unit part assigned to an examination space and a first evaluation unit, is combined with a magnetic resonance tomography unit (MRT). The unit part of the PRT includes at least two gamma ray detector units with in each case an assigned electronics unit. The MRT includes a second evaluation unit, a gradient coil system and a high frequency antenna device formed as a stripline antenna device having at least two conductors. The high frequency antenna device is arranged nearer to the examination space than the gradient coil system with a high frequency shield between the gradient coil system and the high frequency antenna device. Each conductor of the stripline antenna device respectively includes a gamma ray detector unit with an assigned electronics unit. The conductors of the stripline antenna device are configured for the respective gamma ray detector units and their assigned electronics units as shielding covers that are caused by the high frequency antenna device and are opaque to high frequency radiation. An examination object in the examination space can be imaged by the combined positron emission tomography and magnetic resonance tomography unit.

摘要翻译： 将具有分配给检查空间的单位部分和第一评估单元的正电子发射断层摄影单元（PET）与磁共振断层摄影单元（MRT）组合。 PRT的单位部分包括至少两个伽马射线检测器单元，在每种情况下都是分配的电子单元。 MRT包括第二评估单元，梯度线圈系统和形成为具有至少两个导体的带状线天线装置的高频天线装置。 高频天线装置布置成比梯度线圈系统和高频天线装置之间具有高频屏蔽的梯度线圈系统更靠近检查空间。 带状线天线装置的每个导体分别包括具有分配的电子单元的伽马射线检测器单元。 带状线天线装置的导体被配置用于相应的伽马射线检测器单元及其分配的电子单元作为由高频天线装置引起并且对高频辐射不透明的屏蔽盖。 检查空间中的检查对象可以通过组合的正电子发射断层摄影和磁共振断层摄影单元成像。

公开(公告)号：US20060251312A1

公开(公告)日：2006-11-09

申请号：US11395267

申请日：2006-07-03

申请人： Robert Krieg ,  Rainer Kuth ,  Ralf Ladebeck ,  Ralph Oppelt ,  Wolfgang Renz ,  Sebastian Schmidt ,  Markus Vester

发明人： Robert Krieg ,  Rainer Kuth ,  Ralf Ladebeck ,  Ralph Oppelt ,  Wolfgang Renz ,  Sebastian Schmidt ,  Markus Vester

IPC分类号： G01V3/00

CPC分类号： G01T1/1603 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5247 ,  G01R33/481 ,  G01T1/2985

摘要： Combined positron emission tomography and magnetic resonance tomography unit for imaging an examination object in an examination space, comprising a positron emission tomography unit that has a unit part assigned to the examination space, and a first evaluation unit for evaluating the electric signals for a positron emission tomography image of the examination object. The unit part in this case comprises a gamma ray detector with an assigned electronics unit. Furthermore, the combined unit comprises a magnetic resonance tomography unit and a second evaluation unit for evaluating the magnetic resonance signals for a magnetic resonance image of the examination object. The magnetic resonance unit in this case has a high frequency antenna device as well as a gradient coil system, the high frequency antenna device being arranged nearer to the examination space than the gradient coil system, as well as a high frequency shield arranged between the gradient coil system and the high frequency antenna device. The positron emission tomography unit part is arranged in this case between the high frequency shield and the high frequency antenna device, and is provided, at least on the side facing the high frequency antenna device, with a shielding cover that is caused by the high frequency antenna device and is opaque to high frequency radiation.

摘要翻译： 组合正电子发射断层摄影和磁共振断层摄影单元，用于对检查空间中的检查对象进行成像，包括具有分配给检查空间的单位部分的正电子发射断层摄影单元和用于评估正电子发射的电信号的第一评估单元 检查对象的断层扫描图像。 这种情况下的单元部分包括具有分配的电子单元的伽马射线检测器。 此外，组合单元包括磁共振断层摄影单元和用于评估检查对象的磁共振图像的磁共振信号的第二评估单元。 在这种情况下，磁共振单元具有高频天线装置以及梯度线圈系统，高频天线装置布置成比梯度线圈系统更靠近检查空间，以及布置在梯度之间的高频屏蔽 线圈系统和高频天线装置。 在这种情况下，正电子发射断层摄影单元部分布置在高频屏蔽和高频天线装置之间，并且至少在面向高频天线装置的一侧上设置有由高频天线装置引起的屏蔽罩 天线装置，对高频辐射是不透明的。

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。

公开(公告)号：US09121893B2

公开(公告)日：2015-09-01

申请号：US11532665

申请日：2006-09-18

申请人： Matthias J. Schmand ,  Ron Grazioso ,  Ronald Nutt ,  Robert E. Nutt ,  Nan Zhang ,  James Luke Corbeil ,  Ralf Ladebeck ,  Markus Vester ,  Günter Schnur ,  Wolfgang Renz ,  Hubertus Fischer ,  Bernd J. Pichler

发明人： Matthias J. Schmand ,  Ron Grazioso ,  Ronald Nutt ,  Robert E. Nutt ,  Nan Zhang ,  James Luke Corbeil ,  Ralf Ladebeck ,  Markus Vester ,  Günter Schnur ,  Wolfgang Renz ,  Hubertus Fischer ,  Bernd J. Pichler

IPC分类号： G01T1/164 ,  G01T1/166 ,  G01R33/28 ,  G01R33/26 ,  G01R33/381 ,  G01R33/48 ,  G01T1/16 ,  G01T1/29 ,  A61B6/03 ,  A61B8/08

CPC分类号： G01R33/481 ,  A61B6/037 ,  A61B8/5261 ,  G01R33/26 ,  G01R33/28 ,  G01R33/307 ,  G01R33/381 ,  G01T1/1603 ,  G01T1/2018 ,  G01T1/2985

摘要： APD-based PET modules are provided for use in combined PET/MR imaging. Each module includes a number of independent, optically isolated detectors. Each detector includes an array of scintillator (e.g. LSO) crystals read out by an array of APDs. The modules are positioned in the tunnel of a MR scanner. Simultaneous, artifact-free images can be acquired with the APD-based PET and MR system resulting in a high-resolution and cost-effective integrated PET/MR system.

摘要翻译： 提供基于APD的PET模块，用于组合PET / MR成像。 每个模块包括多个独立的光隔离探测器。 每个检测器包括由APD阵列读出的闪烁体阵列（例如LSO）晶体。 模块位于MR扫描仪的通道中。 基于APD的PET和MR系统可以获得同时，无伪影的图像，从而产生高分辨率和成本效益的集成PET / MR系统。

公开(公告)号：US20090322329A1

公开(公告)日：2009-12-31

申请号：US12487748

申请日：2009-06-19

申请人： Dirk Diehl ,  Rene Gumbrecht ,  Juergen Nistler ,  Wolfgang Renz ,  Markus Vester ,  Sebastian Wolf

发明人： Dirk Diehl ,  Rene Gumbrecht ,  Juergen Nistler ,  Wolfgang Renz ,  Markus Vester ,  Sebastian Wolf

IPC分类号： G01R33/48 ,  G01R33/44

CPC分类号： G01R33/3415 ,  A61B5/055 ,  G01R33/288 ,  G01R33/4833 ,  G01R33/5612 ,  G01R33/5659

摘要： In a magnetic resonance apparatus having an RF radiating coil and gradient coils, and in a method for operating such a magnetic resonance apparatus, a pulse sequence, composed of multiple time steps, is specified for operating the gradient coils to time-dependently select regions of a selected slice of a selected volume of a subject. A non-linear equation system is then solved to obtain feed parameters for individual channels of the transmit coil for each time step, with specification of a desired target magnetization, and dependent on the pulse sequence specified for the gradient coils. The non-linear equation system is based on discrete values for time and space variable and, in addition to equations resulting from the Bloch equation, which are non-linear in their feed parameters, includes at least one additional equation that describes boundary conditions for the examination of the subject.

摘要翻译： 在具有RF辐射线圈和梯度线圈的磁共振装置中，并且在用于操作这种磁共振装置的方法中，规定了由多个时间步长组成的脉冲序列，用于操作梯度线圈以时间依次选择 所选择的受试者体积的切片。 然后解决非线性方程式，以获得每个时间步长的发射线圈的各个通道的馈送参数，并且具有期望的目标磁化强度，并且取决于为梯度线圈指定的脉冲序列。 非线性方程系统基于时间和空间变量的离散值，并且除了在其馈送参数中是非线性的由Bloch方程得到的方程之外，还包括至少一个附加方程，其描述了边界条件 考试题目。