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1. 发明授权

US5087880A Method for sensing nuclear magnetic resonance signals given arbitrary gradient shapes 失效
标题翻译：用于检测给定任意梯度形状的核磁共振信号的方法
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。

2. 发明授权

US5068609A Method for generating an image using nuclear magnetic resonance signals 失效
标题翻译：使用核磁共振信号产生图像的方法
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。

3. 发明授权

US5084675A Method for improving the signal-to-noise ratio in a nuclear magnetic resonance tomography apparatus 失效
标题翻译：改进核磁共振成像装置中信号噪声比的方法
公开(公告)号：US5084675A
公开(公告)日：1992-01-28
申请号：US565951
申请日：1990-08-10
申请人： Hans-Erich Reinfelder , Hubertus Fischer
发明人： Hans-Erich Reinfelder , Hubertus Fischer
IPC分类号： A61B5/055 , G01R33/32 , G01R33/56
CPC分类号： G01R33/56 , G01R33/543 , G01R33/5608 , G01R33/5616
摘要： In the echo planar imaging (EPI) method of operating a nuclear magnetic resonance (magnetic resonance imaging) tomography apparatus, the necessary, rapid switching of gradients having a high amplitude usually cannot be achieved with square-wave gradients, and therefore a read-out gradient having a sinusoidal shape is generally used. Given a chronologically equidistant sampling of the nuclear magnetic resonance signal in the time domain, however, a sampling in the k-space with different rates is present. The bandwidth of the signal is proportional to the sampling rate in the k-space. In the method disclosed herein, bandwidth of a bandpass filter or a low-pass filter in the signal processing circuit for the nuclear magnetic resonance signal is adapted to the time dependent bandwith of the nuclear magnetic resonance signal, i.e., to the sampling rate in the k-space. The bandwidth is increased with increasing sampling rate. The signal-to-noise ratio is noticeably improved.
摘要翻译：在操作核磁共振（磁共振成像）断层摄影装置的回波平面成像（EPI）方法中，通常使用方波梯度不能实现具有高振幅的梯度的必要的快速切换，因此读出通常使用具有正弦形状的梯度。然而，鉴于时域上的核磁共振信号的时间上等距离的采样，存在具有不同速率的k空间中的采样。信号的带宽与k空间中的采样率成比例。在本文公开的方法中，用于核磁共振信号的信号处理电路中的带通滤波器或低通滤波器的带宽适应于核磁共振信号的时间依赖带宽，即适应于 k空间。带宽随采样率的增加而增加。信噪比明显提高。

4. 发明授权

US06262575B1 Method for imaging fat plaque with nuclear magnetic resonance tomography 失效
标题翻译：用核磁共振断层扫描成像脂肪斑块的方法
公开(公告)号：US06262575B1
公开(公告)日：2001-07-17
申请号：US09161666
申请日：1998-09-29
申请人： Herbert Bruder , Hubertus Fischer
发明人： Herbert Bruder , Hubertus Fischer
IPC分类号： G01R3320
CPC分类号： G01R33/483 , A61B5/055 , A61B5/7285
摘要： In a method for producing an image of fat plaque employing nuclear magnetic resonance tomography, a radio-frequency excitation pulse is emitted with wavelet coding in the presence of a first gradient, refocusing pulses are emitted which are selective to the spectral frequency of fat, and the resulting nuclear magnetic resonance signals are read out in the presence of a further magnetic field gradient. An image of fat plaque with enhanced spatial resolution is thereby produced.
摘要翻译：在使用核磁共振断层摄影法生产脂肪斑的图像的方法中，在存在第一梯度的情况下，利用小波编码发射射频激发脉冲，发射对于脂肪的光谱频率有选择性的重聚焦脉冲，以及在存在另外的磁场梯度的情况下读出所得到的核磁共振信号。由此产生具有增强的空间分辨率的脂肪斑块的图像。

5. 发明授权

US5298863A Magnetic resonance imaging apparatus having a resonant circuit for generating gradient fields, and method for operating same 失效
标题翻译：具有用于产生梯度场的谐振电路的磁共振成像装置及其操作方法
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。

6. 发明授权

US5617030A Method and apparatus for gradient power supply for a nuclear magnetic resonance tomography apparatus 失效
标题翻译：用于核磁共振断层摄影装置的梯度电源的方法和装置
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。

7. 发明授权

US4901020A Pulse sequence for operating a nuclear magnetic resonance tomography apparatus for producing images with different T.sub.2 contrast 失效
标题翻译：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
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。

8. 发明授权

US5162730A Method for operating a magnetic resonant imaging tomography apparatus 失效
标题翻译：用于操作磁共振成像测量装置的方法
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。

9. 发明申请

US20180313922A1 GENERATING A SPATIALLY RESOLVED MAGNETIC RESONANCE DATASET 审中-公开
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.

10. 发明授权

US09848798B2 Positioning apparatus 有权
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.

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