公开(公告)号：US5298863A

公开(公告)日：1994-03-29

申请号：US621040

申请日：1990-12-03

申请人： Stefan Nowak ,  Franz Schmitt ,  Hubertus Fischer

发明人： Stefan Nowak ,  Franz Schmitt ,  Hubertus Fischer

IPC分类号： G01R33/385 ,  G01R33/20

CPC分类号： G01R33/3852

摘要： A gradient coil for generating a periodically changing read-out gradient in a magnetic resonance imaging apparatus is operated in a series resonant circuit having a capacitor. One of the elements of the series resonant circuit is charged before the beginning of each read-out gradient. The gradient coil can be charged with current, or the capacitor can be charged with voltage. Such operation either avoids or significantly shortens the transient effect which occurs after excitation of the nuclear spins. The use of a series resonant circuit instead of a parallel resonant circuit significantly reduces the voltage load on the gradient amplifier, so that the gradient amplifier can be constructed simpler and more inexpensively.

摘要翻译： 在具有电容器的串联谐振电路中操作用于在磁共振成像装置中产生周期性变化的读出梯度的梯度线圈。 在每个读出梯度的开始之前，串联谐振电路的元件之一被充电。 梯度线圈可以充电电流，或者电容器可以充电电压。 这种操作可以避免或显着缩短在核自旋激发后发生的瞬态效应。 使用串联谐振电路代替并联谐振电路可以显着降低梯度放大器的电压负载，从而使梯度放大器的构造更简单，成本更低。

公开(公告)号：US5617030A

公开(公告)日：1997-04-01

申请号：US621622

申请日：1996-03-26

申请人： Hubertus Fischer ,  Stefan Nowak ,  Franz Schmitt

发明人： Hubertus Fischer ,  Stefan Nowak ,  Franz Schmitt

IPC分类号： A61B5/055 ,  G01R33/385 ,  G01V3/00

CPC分类号： G01R33/3852

摘要： A gradient coil is connected to a controllable gradient amplifier via a first diagonal of a bridge circuit having four switches and unbiased diodes respectively connected parallel thereto. A capacitor that forms a resonant circuit together with the gradient coil is connected into the second bridge diagonal of the bridge circuit. A sinusoidal current is supplied through the gradient coil. Due to intentionally incomplete discharging of the capacitor at every other half-wave, an offset current can be superimposed on the sinusoidal current through the gradient coil.

摘要翻译： 梯形线圈经由具有四个分别与其并联连接的开关和无偏置二极管的桥接电路的第一对角线连接到可控梯度放大器。 与梯度线圈一起形成谐振电路的电容器被连接到桥式电路的第二桥对角线中。 通过梯形线圈提供正弦电流。 由于电容器在每隔一个半波有意不完全放电，偏移电流可以叠加在通过梯度线圈的正弦电流上。

公开(公告)号：US4901020A

公开(公告)日：1990-02-13

申请号：US327891

申请日：1989-03-23

申请人： Ralf Ladebeck ,  Hubertus Fischer ,  Franz Schmitt

发明人： Ralf Ladebeck ,  Hubertus Fischer ,  Franz Schmitt

IPC分类号： G01R33/50 ,  G01R33/56

CPC分类号： G01R33/56 ,  G01R33/50

摘要： A pulse sequence is disclosed for operating a nuclear magnetic resonance tomography apparatus for producing images having different T.sub.2 contrast. A signal for the gradient-echo imaging is first acquired after excitation of the nuclei subsequently, the magnetization, which is already prepared for imaging, is refocused by a 180.degree. radio-frequency pulse, and a second echo is measured in the presence of a readout gradient. Independent images having different T.sub.2 contrast can be reconstructed with the gradient echo and with the spin echo. It is thus possible to simultaneously measure a gradient echo image having a significantly lower T.sub.2 contrast during the measuring time for a spin echo image.

摘要翻译： 公开了用于操作用于产生具有不同T2对比度的图像的核磁共振断层摄影装置的脉冲序列。 梯度回波成像的信号首先在核心激发之后被采集，已经准备好用于成像的磁化被180度射频脉冲重新聚焦，并且在存在下测量第二回波 读出梯度。 可以用梯度回波和自旋回波重建具有不同T2对比度的独立图像。 因此，可以在自旋回波图像的测量时间期间同时测量具有显着较低T2对比度的梯度回波图像。

公开(公告)号：US5162730A

公开(公告)日：1992-11-10

申请号：US611677

申请日：1990-11-13

申请人： Franz Schmitt ,  Hubertus Fischer

发明人： Franz Schmitt ,  Hubertus Fischer

IPC分类号： G01R33/561

CPC分类号： G01R33/5615 ,  G01R33/5616

摘要： A method, in the form of a pulse sequence for operating a magnetic resonance imaging tomography apparatus according to a modification of the echo planar method includes the generation of a read-out gradient consisting of sub-pulses having reversing polarity, the read-out gradient being activated in each scan after an RF excitation. A phase coding gradient, also consisting of a number of sub-pulses, is activated at each polarity change of the read-out gradient. The sub-pulses of the phase coding gradient have a polarity which alternates from sub-pulse to sub-pulse, and an amplitude-time area which increases in steps. An improved signal-to-noise ratio is achieved with this pulse sequence and N/2 ghosts are avoided.

摘要翻译： 根据回波平面方法的修改的用于操作磁共振成像断层摄影装置的脉冲序列形式的方法包括产生由具有反向极性的子脉冲，读出梯度 在RF激发后在每次扫描中被激活。 在读出的梯度的每个极性变化下激活也由多个子脉冲组成的相位编码梯度。 相位编码梯度的子脉冲具有从子脉冲到次脉冲交替的极性，以及逐步增加的幅度 - 时间区域。 通过该脉冲序列实现改善的信噪比，并避免N / 2个重影。

公开(公告)号：US5087880A

公开(公告)日：1992-02-11

申请号：US482963

申请日：1990-02-22

申请人： Herbert Bruder ,  Hubertus Fischer ,  Hans-Erich Reinfelder ,  Franz Schmitt

发明人： Herbert Bruder ,  Hubertus Fischer ,  Hans-Erich Reinfelder ,  Franz Schmitt

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/565

CPC分类号： G01R33/56572 ,  G01R33/56545

摘要： A method for operating a nuclear resonance imaging device given gradients of arbitrary shapes includes the steps of equidistantly sampling the nuclear magnetic resonance signals in the time domain with a sampling rate that satisfies the sampling theorem, the sampling taking place even given gradients having a non-rectangular pulse shape. Since non-equidistant sampling in the K-space would normally lead to image artifacts, the method includes the further step, to avoid such artifacts, of calculating measured values from the acquired samples by interpolation, these measured values being equidistant in the K-space, and being entered into a measurement matrix. The equidistant sampling in the K-space, which is complicated, is thus superfluous given gradients having an arbitrary pulse shape.

摘要翻译： 给定给定任意形状梯度的核共振成像装置的方法包括以满足采样定理的采样速率等时采样时域中的核磁共振信号的步骤，即使给定梯度具有非线性的采样， 矩形脉冲形状。 由于K空间中的非等距采样通常会导致图像伪影，所以该方法还包括进一步的步骤，为了避免这种伪像，通过插值从所采集的样本中计算测量值，这些测量值在K空间中是等距的 ，并输入测量矩阵。 因此，复杂的K空间中的等距采样因此是具有任意脉冲形状的给定梯度的多余采样。

公开(公告)号：US5068609A

公开(公告)日：1991-11-26

申请号：US524344

申请日：1990-05-16

申请人： Herbert Bruder ,  Hubertus Fischer ,  Franz Schmitt ,  Hans-Erich Reinfelder

发明人： Herbert Bruder ,  Hubertus Fischer ,  Franz Schmitt ,  Hans-Erich Reinfelder

IPC分类号： G01R33/565

CPC分类号： G01R33/56554 ,  G01R33/56545

摘要： A method for generating an image using nuclear magnetic resonance signals, which substantially eliminates the presence of so-called "N/2 ghosts," includes the steps of dividing a measurement matrix into a first sub-matrix containing the even-numbered rows of the measurement matrix and into a second sub-matrix having the odd-numbered rows of the measurement matrix, setting the entries in the remaining rows of the sub-matrices to zero, subjecting both sub-matrices to a Fourier transformation at least in the column direction, thereby generating respective intermediate image matrices, multiplying one of the intermediate image matrices by a factor which is calculated from the edge rows of the intermediate image matrices, and adding the intermediate image matrices after the multiplication.

摘要翻译： 使用核磁共振信号产生图像的方法基本上消除了所谓的“N / 2重影”的存在，包括以下步骤：将测量矩阵划分成包含偶数行的第一子矩阵 测量矩阵和具有测量矩阵的奇数行的第二子矩阵，将子矩阵的剩余行中的条目设置为零，使两个子矩阵至少在列方向上进行傅里叶变换 从而生成各自的中间图像矩阵，将中间图像矩阵中的一个乘以从中间图像矩阵的边缘行计算的因子，并且在相乘之后相加中间图像矩阵。

公开(公告)号：US20180313922A1

公开(公告)日：2018-11-01

申请号：US15965919

申请日：2018-04-28

申请人： Marc Beckmann ,  Petra Bildhauer ,  Carsten Großhauser ,  Hubertus Fischer ,  Uvo Hölscher ,  Ralf Kartäusch ,  Jürgen Nistler ,  Dominik Paul ,  Dieter Ritter ,  Volker Weißenberger

发明人： Marc Beckmann ,  Petra Bildhauer ,  Carsten Großhauser ,  Hubertus Fischer ,  Uvo Hölscher ,  Ralf Kartäusch ,  Jürgen Nistler ,  Dominik Paul ,  Dieter Ritter ,  Volker Weißenberger

IPC分类号： G01R33/44 ,  G01R33/56 ,  G01R33/34 ,  G01R33/36

CPC分类号： G01R33/443 ,  G01R33/246 ,  G01R33/34046 ,  G01R33/3621 ,  G01R33/5608 ,  G01R33/5659

摘要： A method for generating a spatially resolved magnetic resonance dataset using a coil arrangement includes providing at least one correction datum based on receiver characteristics of the coil arrangement. The method also includes providing a magnetic resonance dataset with spatially resolved signal intensity data, and correcting the at least one signal intensity datum in the magnetic resonance dataset by the correction datum before or after providing the magnetic resonance dataset.

公开(公告)号：US09848798B2

公开(公告)日：2017-12-26

申请号：US14476428

申请日：2014-09-03

申请人： Yvonne Candidus ,  Daniel Driemel ,  Hubertus Fischer ,  Wolfgang Kraus ,  Thomas Kundner ,  Martin Zigann ,  Stephan Zink

发明人： Yvonne Candidus ,  Daniel Driemel ,  Hubertus Fischer ,  Wolfgang Kraus ,  Thomas Kundner ,  Martin Zigann ,  Stephan Zink

IPC分类号： A61B6/04 ,  A61B5/055

CPC分类号： A61B5/0555 ,  A61B6/0407

摘要： A positioning apparatus configured to actively assist the support, positioning, or support and positioning of a patient on a patient support apparatus is provided. The positioning apparatus includes a sliding bearing unit to allow the positioning apparatus to be supported in a movable manner on the patient support apparatus, and a bearing unit with at least two bearing regions. At least a first of the at least two bearing regions is configured to support and/or provide support on the patient support apparatus, and at least a second of the at least two bearing regions is configured to assist the positioning of the patient.

公开(公告)号：US20150312670A1

公开(公告)日：2015-10-29

申请号：US14695875

申请日：2015-04-24

申请人： Yvonne Candidus ,  Hubertus Fischer

发明人： Yvonne Candidus ,  Hubertus Fischer

IPC分类号： H04R1/10

CPC分类号： H04R1/1083 ,  A61B5/055 ,  A61F11/14 ,  A61F2250/0003 ,  G01R33/283 ,  G01R33/288 ,  H04R1/1008

摘要： A hearing protection device for use in magnetic resonance devices is provided. The hearing protection device has a first hearing protection unit for disposal on a first ear of a patient and a second hearing protection unit for disposal on a second ear of a patient. The first hearing protection unit and/or the second hearing protection unit has a fluid cushion unit.

摘要翻译： 提供一种用于磁共振装置的听力保护装置。 听力保护装置具有用于在患者的第一耳部处置的第一听力保护单元和用于在患者的第二耳朵上进行处置的第二听力保护单元。 第一听力保护单元和/或第二听力保护单元具有流体缓冲单元。

公开(公告)号：US20090091326A1

公开(公告)日：2009-04-09

申请号：US12238871

申请日：2008-09-26

申请人： Hubertus Fischer ,  Helmut Kess ,  Georg Rauh ,  Wilfried Schnell

发明人： Hubertus Fischer ,  Helmut Kess ,  Georg Rauh ,  Wilfried Schnell

IPC分类号： G01R33/32

CPC分类号： G01R33/3664 ,  G01R33/3642 ,  G01R33/4833 ,  G01R33/56366

摘要： A radio-frequency transmission device for a magnetic resonance system to generate magnetic resonance exposures of an examination region of an examination subject, has: a first radio-frequency transmission antenna that emits radio-frequency signals in the examination region, a radio-frequency amplifier that supplies the first radio-frequency transmission antenna, with radio-frequency signals with a predetermined radio-frequency transmission power, and a second radio-frequency transmission antenna fashioned to label a medium flowing in the examination region and/or examination regions via emission of labeling radio-frequency signals, such that the medium can be identified in the generated magnetic resonance exposures of the examination region. The second radio-frequency transmission antenna is coupled with the radio-frequency amplifier to supply the first radio-frequency transmission antenna, such that it likewise supplies the second radio-frequency transmission antenna with radio-frequency signals with a predetermined radio-frequency transmission power for the emission of radio-frequency labeling signals.

摘要翻译： 一种用于产生检查对象的检查区域的磁共振曝光的磁共振系统的射频传输装置，具有：在检查区域中发射射频信号的第一射频发射天线，射频放大器 其提供具有预定的射频发射功率的射频信号的第一射频发射天线，以及第二射频发射天线，其通过发射检测区域和/或检查区域中标记流经检查区域和/或检查区域的介质 标记射频信号，使得可以在产生的检查区域的磁共振暴露中识别介质。 第二射频发射天线与射频放大器耦合以提供第一射频发射天线，使得它同样向第二射频发射天线提供具有预定射频发射功率的射频信号 用于发射射频标签信号。