公开(公告)号：US20080231270A1

公开(公告)日：2008-09-25

申请号：US12051127

申请日：2008-03-19

申请人： Joerg Ulrich Fontius ,  Franz Schmitt ,  Karsten Wicklow

发明人： Joerg Ulrich Fontius ,  Franz Schmitt ,  Karsten Wicklow

IPC分类号： G01R33/48

CPC分类号： G01R33/583 ,  G01R33/288 ,  G01R33/36 ,  G01R33/5608 ,  G01R33/5612 ,  G01R33/5659

摘要： In a method for adjustment of a B1 field in a magnetic resonance apparatus, the position of the measurement subject relative to a coordinate system is determined from a plurality of measurement subjects with a morphological magnetic resonance measurement. Three-dimensionally associable measurement subject data are determined from the measurement subject. Respective tissue types of the measurement subject are determined using the three-dimensional measurement subject data and a segmentation of the measurement subject into regions is effected using the tissue types. Known dielectric properties are respectively associated with the tissue types. The segmentation and the association for all positions of the measurement subject are recorded in respective entries of a database, such that the database contains all entries of the measurement subjects. A radio-frequency simulation for an transmission coils is implemented with the entries of the database, with which electrical field distributions and/or B1 field distributions related to spatial elements are determined as a simulation result and are entered as results into the database. For further magnetic resonance examinations, the entries of the database are used for determination of an optimized current distribution for elements of a transmission coil with which the B1 field is ultimately adjusted.

摘要翻译： 在用于调整磁共振装置中的B1场的方法中，从具有形态磁共振测量的多个测量对象确定测量对象相对于坐标系的位置。 从测量对象确定三维可关联的测量对象数据。 使用三维测量对象数据确定测量对象的各种组织类型，并且使用组织类型对测量对象进入区域进行分割。 已知的介电性质分别与组织类型相关。 将测量对象的所有位置的分割和关联记录在数据库的相应条目中，使得数据库包含测量对象的所有条目。 用数据库的条目实现传输线圈的射频仿真，将与空间元素相关的电场分布和/或B1场分布确定为模拟结果并作为结果输入到数据库中。 对于进一步的磁共振检查，数据库的条目用于确定最终调整B1场的传输线圈元件的优化电流分布。

公开(公告)号：US20080088306A1

公开(公告)日：2008-04-17

申请号：US11871201

申请日：2007-10-12

申请人： Andrew Dewdney ,  Sabrina Harter ,  Franz Schmitt

发明人： Andrew Dewdney ,  Sabrina Harter ,  Franz Schmitt

IPC分类号： G01N24/08 ,  A61B5/055

CPC分类号： A61B5/055 ,  A61B5/0037 ,  A61B2560/0223 ,  G01R33/243 ,  G01R33/3875

摘要： In a method for adjustment of a shim device of a magnetic resonance apparatus before an image acquisition in a body region that has a volume of interest, a field distribution is measured in a region encompassing the volume of interest produced with a shim device set according to a basic shim data set. A shim data set that is optimized for the volume of interest is determined by a control device starting from the basic shim data set, dependent on the field distribution; and the optimized shim data set is used for adjustment of the shim device. The basic shim data set is selected from a databank of body region-specific input shim data sets.

摘要翻译： 在用于在具有感兴趣体积的身体区域中的图像采集之前调整磁共振装置的垫片装置的方法中，在包围利用根据下述方法设置的垫片装置产生的感兴趣体积的区域中测量场分布 一个基本的垫片数据集。 根据感兴趣的体积优化的垫片数据集由控制装置由基本的垫片数据集开始，取决于场分布; 并且优化的垫片数据集用于调整垫片装置。 基本垫片数据集从身体区域特定的输入垫片数据集的数据库中选择。

公开(公告)号：US20080015431A1

公开(公告)日：2008-01-17

申请号：US11777334

申请日：2007-07-13

申请人： Franz Schmitt

发明人： Franz Schmitt

IPC分类号： A61B5/055

CPC分类号： A61B5/0555 ,  G01R33/288 ,  G01R33/307

摘要： A magnetic resonance device has a patient bed able to be automatically moved by means of a drive apparatus into a patient chamber, as well as a magnet arrangement for creating a magnetic field in the interior of the patient chamber. The drive apparatus is operated so as to move the patient bed at a speed determined as a function of the distribution of the magnetic field in the direction of movement of the patient bed.

摘要翻译： 磁共振装置具有能够通过驱动装置自动移动到病人室中的患者床，以及用于在患者室的内部产生磁场的磁体装置。 驱动装置被操作以便以病人床的移动方向上的磁场分布确定的速度移动患者床。

公开(公告)号：US20050092062A1

公开(公告)日：2005-05-05

申请号：US10974531

申请日：2004-10-27

申请人： Christian Beck ,  Bolko Raffel ,  Hubert Ehbing ,  Peter Jahn ,  Franz Schmitt

发明人： Christian Beck ,  Bolko Raffel ,  Hubert Ehbing ,  Peter Jahn ,  Franz Schmitt

IPC分类号： G01N7/14 ,  G01N33/44 ,  G01N7/00

CPC分类号： G01N7/14 ,  G01N33/44

摘要： The invention describes a device for determining the gas content of a liquid. The device has at least a housing, a measuring chamber base with a cavity and a measuring chamber cover inside the housing. The measuring chamber base and the measuring chamber cover are each movable by a respective piston independently of one another along the longitudinal axis of the housing. The measuring chamber base and the measuring chamber cover form a measuring chamber in the housing. The measuring chamber base or the measuring chamber cover is connected to a pressure sensor and the housing has a liquid inlet and a liquid outlet.

摘要翻译： 本发明描述了一种用于确定液体的气体含量的装置。 该装置至少具有壳体，具有空腔的测量室基座和壳体内的测量室盖。 测量室基座和测量室盖各自可以通过相应的活塞沿着壳体的纵向轴线彼此独立地移动。 测量室基座和测量室盖在壳体中形成测量室。 测量室基座或测量室盖连接到压力传感器，并且壳体具有液体入口和液体出口。

公开(公告)号：US06515479B1

公开(公告)日：2003-02-04

申请号：US09524616

申请日：2000-03-14

申请人： Winfried Arz ,  Matthias Gebhardt ,  Franz Schmitt

发明人： Winfried Arz ,  Matthias Gebhardt ,  Franz Schmitt

IPC分类号： G01V300

CPC分类号： G01R33/385

摘要： A switchable longitudinal gradient coil with a cylindrical structure and windings that are symmetrically arranged around the Z-axis is composed of discrete windings or winding packets, or of continuous windings or continuous winding packets, which are provided with a separate supply line to an end face and which, outside of the coil, can be selectively connected to one another individually and/or in groups corresponding to the desired performance features.

摘要翻译： 具有圆柱形结构的可切换的纵向梯度线圈和围绕Z轴对称布置的绕组由离散的绕组或绕组包，或连续的绕组或连续绕组包组成，它们设置有与端面分开的供电线 并且在线圈外部可以单独地和/或对应于期望的性能特征的组中的每一个选择性地彼此连接。

公开(公告)号：US06297635B1

公开(公告)日：2001-10-02

申请号：US09436602

申请日：1999-11-09

申请人： Winfried Arz ,  Matthias Gebhardt ,  Franz Schmitt ,  Johann Schuster

发明人： Winfried Arz ,  Matthias Gebhardt ,  Franz Schmitt ,  Johann Schuster

IPC分类号： G01V300

CPC分类号： G01R33/385

摘要： A gradient coil arrangement for a nuclear magnetic resonance tomography apparatus contains windings arranged in a primary winding plane as well as further windings arranged in a secondary winding plane. The primary and the secondary winding planes are radially spaced from each other thereby have a radial spacing. At an end face of the gradient coil arrangement, the windings have a number of open (free) conductor ends, and connector elements connect conductor ends in the primary winding plane to conductor ends in the secondary winding plane and/or connect conductor ends within one of the winding planes to one another. The connector elements are switchably fashioned for forming gradient coil arrangements having different field qualities/performance features.

摘要翻译： 用于核磁共振断层摄影装置的梯度线圈装置包含布置在初级绕组平面中的绕组以及布置在次级绕组平面中的另外的绕组。 初级和次级绕组平面彼此径向间隔开，因此具有径向间隔。 在梯度线圈装置的端面处，绕组具有多个开放（自由）导体端，并且连接器元件将初级绕组平面中的导体端连接到次级绕组平面中的导体端和/或将导体端部连接在一个 的绕组飞机彼此之间。 连接器元件可切换地形成用于形成具有不同的场质量/性能特征的梯度线圈装置。

公开(公告)号：US5701076A

公开(公告)日：1997-12-23

申请号：US617568

申请日：1996-03-19

申请人： Franz Schmitt ,  Stefan Nowak

发明人： Franz Schmitt ,  Stefan Nowak

IPC分类号： G01R33/28 ,  A61B5/055 ,  G01R33/385 ,  G01R33/36

CPC分类号： G01R33/3852

摘要： The current supply of a gradient coil in a magnetic resonance tomography apparatus with a gradient amplifier and a connectable capacitor that can be interconnected with the gradient coil to form a series resonant circuit. The gradient amplifier produces at least a part of the voltage needed for driving a predetermined gradient current through the gradient coil. The resonant frequency of the capacitor in combination with the gradient coil is lower than 1/4 T.sub.r, whereby T.sub.r is the duration of a leading or trailing edge of the gradient current.

摘要翻译： 在具有梯度放大器和可连接电容器的磁共振断层摄影装置中电流供应梯度线圈，其可与梯度线圈互连以形成串联谐振电路。 梯度放大器产生驱动通过梯度线圈的预定梯度电流所需的电压的至少一部分。 电容器与梯度线圈的共振频率低于+ E，fra 1/4 + EE Tr，其中Tr是梯度电流的前沿或后沿的持续时间。

公开(公告)号：US5245287A

公开(公告)日：1993-09-14

申请号：US924976

申请日：1992-08-05

申请人： Stefan Nowak ,  Franz Schmitt

发明人： Stefan Nowak ,  Franz Schmitt

IPC分类号： G01R33/385

CPC分类号： G01R33/385

摘要： A nuclear magnetic resonance tomography apparatus has at least one gradient coil interconnected with a capacitor to form a resonant circuit. Before the beginning of each read-out sequence, the capacitor is charged to a higher voltage than would be necessary to produce a pure sine oscillation during the read-out sequence. The rise time of the gradient pulse thus produced is less than one-fourth of the duration of the sinusoidal oscillation before the zero-axis crossing, and the decay time is less than one-fourth of the duration of the sinusoidal oscillation after the zero-axis crossing. Additionally, a constant part of each gradient pulse is non-resonantly generated by a gradient amplifier. Only the steep parts of the oscillation of the resonant circuit are used for the rising and trailing edges, whereas the flattened part of the sine oscillation is cut off. The rising and trailing edges can thus be noticeably shortened, so that a greater range for the constant gradient value, which can be equidistantly sampled in the k-space is available for the signal evaluation.

摘要翻译： 核磁共振断层摄影装置具有与电容器互连以形成谐振电路的至少一个梯度线圈。 在每个读出序列开始之前，电容器被充电到比在读出序列期间产生纯正弦振荡所必需的电压更高的电压。 由此产生的梯度脉冲的上升时间小于零轴交叉之前的正弦振荡的持续时间的四分之一，并且衰减时间小于零点后的正弦振荡的持续时间的四分之一， 轴交叉。 此外，每个梯度脉冲的恒定部分由梯度放大器非谐振地产生。 谐振电路的振荡的陡峭部分用于上升沿和后沿，而正弦振荡的扁平部分被切断。 因此，上升沿和后沿可以明显缩短，使得可以在k空间中等距采样的恒定梯度值的更大范围用于信号评估。

公开(公告)号：US5138259A

公开(公告)日：1992-08-11

申请号：US653510

申请日：1991-02-11

申请人： Franz Schmitt ,  Georg Goertler

发明人： Franz Schmitt ,  Georg Goertler

IPC分类号： G01R33/561 ,  G01R33/565

CPC分类号： G01R33/56554 ,  G01R33/56563

摘要： A method for suppressing image artifacts in a magnetic resonance imaging apparatus includes conducting an adjustment scan of the examination subject preceding or following the scan or scans which are used to acquire the measured data. The adjustment scan differs from measuring scan in that it is implemented without the generation of a phase-coding gradient. The data acquired in the adjustment scan are interpreted to identify any inadequacies in the generation of the raw data, and correction data are calculated. Using the correction data, the raw data sets which are Fourier-transformed in the read-out direction, are then corrected. N/2 ghosts can thus be suppressed, and the influence of inhomogeneities in the static field can be reduced.

摘要翻译： 一种用于抑制磁共振成像装置中的图像伪像的方法包括对用于获取测量数据的扫描或扫描之前或之后的检查对象进行调整扫描。 调整扫描与测量扫描不同之处在于，它不需要生成相位编码梯度即可实现。 在调整扫描中获取的数据被解释为识别原始数据的生成中的任何不足之处，并且计算校正数据。 然后，使用校正数据对在读出方向进行傅立叶变换的原始数据组进行校正。 因此可以抑制N / 2个鬼，并且可以减少静态场中的不均匀性的影响。

公开(公告)号：US4206399A

公开(公告)日：1980-06-03

申请号：US890764

申请日：1978-03-27

申请人： Hans G. Fitzky ,  Franz Schmitt ,  Norbert Bollongino ,  Helmut Rehrmann

发明人： Hans G. Fitzky ,  Franz Schmitt ,  Norbert Bollongino ,  Helmut Rehrmann

IPC分类号： G01N22/04 ,  G01R27/04

CPC分类号： G01N22/04

摘要： The principle of measurement is based on the microwave absorption by the water content of a sample. The sample is located in a closed single-reflection measurement cell which is fed by a microwave oscillator which is frequency-modulated within the absorbing frequency range of the sample. The sample partially or completely fills the end section of a circular or rectangular waveguide forming the measurement cell. The waveguide is sealed off with a short circuit plate so that two planar travelling waves with a homogeneous field distribution are present in the measurement cell.

摘要翻译： 测量的原理是基于微波对样品含水量的吸收。 样品位于封闭的单反射测量单元中，该单元由在样品的吸收频率范围内被调频的微波振荡器馈送。 样品部分或完全填充形成测量单元的圆形或矩形波导的端部。 波导用短路板密封，使得具有均匀场分布的两个平面行波存在于测量单元中。