公开(公告)号：US06750650B2

公开(公告)日：2004-06-15

申请号：US10188212

申请日：2002-07-02

申请人： Berthold Kiefer ,  Ralf Loeffler

发明人： Berthold Kiefer ,  Ralf Loeffler

IPC分类号： G01V300

CPC分类号： G01R33/4828 ,  G01R33/3875 ,  G01R33/56563

摘要： In a magnetic resonance tomography apparatus and a method for the operation thereof the acquisition of pure fat and water images is enabled, taking the basic field inhomogeneities into consideration, by utilizing the data that are obtained about the relevant measurement volume by means of a conventional 3D field measurement for the correction of the residual phase offset of the imaging data. The imaging data are preferably acquired on the basis of the 2-point Dixon method.

摘要翻译： 在磁共振断层摄影装置及其操作方法中，通过利用通过常规3D获得的关于相关测量体积的数据，考虑到基本场不均匀性，可以获得纯脂肪和水图像的获取 用于校正成像数据的残留相位偏移的场测量。 成像数据优选基于2点Dixon方法获取。

公开(公告)号：US20080139919A1

公开(公告)日：2008-06-12

申请号：US11753691

申请日：2007-05-25

申请人： Stephan Kannengiesser ,  Ralf Loeffler ,  Edgar Mueller ,  Peter Schmitt

发明人： Stephan Kannengiesser ,  Ralf Loeffler ,  Edgar Mueller ,  Peter Schmitt

IPC分类号： A61B5/055

CPC分类号： G01R33/5611 ,  G01R33/4824

摘要： In a method as well as a magnetic resonance tomography apparatus for implementation of such a method for improved sensitivity-encoded magnetic resonance imaging using a two-dimensional or three-dimensional acquisition coil array, two-dimensional or three-dimensional undersampling of k-space is undertaken by measurement of a number N of basic partial trajectories τn in k-space that in their entirety form a geometric arrangement of source points, a number M of different operators Cm(Δ km) are determined, with each operator representing an algebraic transformation with which unmeasured target points at an interval Δ km from one of the measured source points are synthesized from a number of measured source points, the operators Cm(Δ km) are applied to at least one subset of the measured source points for at least partial completion of the magnetic resonance data set, and a largely artifact-free image is reconstructed in three-dimensional space on the basis of the measured source points and the synthesized data points.

摘要翻译： 在一种方法以及用于实施这种用于使用二维或三维采集线圈阵列改进灵敏度编码的磁共振成像的方法的磁共振断层摄影装置中，k空间的二维或三维欠采样 通过测量k空间中的N个基本部分轨迹τN n N进行，其整体形成源点的几何排列，M个不同算子C m， 确定每个运算符代表一个代数变换（Delta k m）），其中未测量的目标点的间隔距离为Δ k 从测量的源点之一中的一个m 从多个测量的源点合成，运算符C＆prime;（Delta＆lt; O OYYLE =“SINGLE” m>）被施加到测量的源点的至少一个子集，用于至少部分完成磁共振 ce数据集，并且基于测量的源点和合成数据点在三维空间中重建大量无伪影的图像。

公开(公告)号：US07821262B2

公开(公告)日：2010-10-26

申请号：US11753691

申请日：2007-05-25

申请人： Stephan Kannengiesser ,  Ralf Loeffler ,  Edgar Mueller ,  Peter Schmitt

发明人： Stephan Kannengiesser ,  Ralf Loeffler ,  Edgar Mueller ,  Peter Schmitt

IPC分类号： G01V3/00

CPC分类号： G01R33/5611 ,  G01R33/4824

摘要： In a method as well as a magnetic resonance tomography apparatus for implementation of such a method for improved sensitivity-encoded magnetic resonance imaging using a two-dimensional or three-dimensional acquisition coil array, two-dimensional or three-dimensional undersampling of k-space is undertaken by measurement of a number N of basic partial trajectories τn in k-space that in their entirety form a geometric arrangement of source points, a number M of different operators Cm(Δ km) are determined, with each operator representing an algebraic transformation with which unmeasured target points at an interval Δ km from one of the measured source points are synthesized from a number of measured source points, the operators Cm(Δ km) are applied to at least one subset of the measured source points for at least partial completion of the magnetic resonance data set, and a largely artifact-free image is reconstructed in three-dimensional space on the basis of the measured source points and the synthesized data points.

摘要翻译： 在一种方法以及用于实施这种用于使用二维或三维采集线圈阵列改进灵敏度编码的磁共振成像的方法的磁共振断层摄影装置中，k空间的二维或三维欠采样 通过测量k空间中的N个基本部分轨迹τn进行，其整体形成源点的几何排列，确定不同算子C m（＆Dgr; km）的数量M，每个运算符表示代数 未测量的目标点的间隔＆Dgr的转换; 从测量的源点之一合成一公里，将运算符Cm（＆Dgr; km）应用于测量源点的至少一个子集，用于至少部分完成磁共振数据集， 并且基于测量的源点和合成数据点在三维空间中重建基本上无伪影的图像。

公开(公告)号：US20050245812A1

公开(公告)日：2005-11-03

申请号：US10835849

申请日：2004-04-29

申请人： Jae Kim ,  Kevin Chen ,  Arthur Stillman ,  Ralf Loeffler ,  Randolph Setser ,  Richard White

发明人： Jae Kim ,  Kevin Chen ,  Arthur Stillman ,  Ralf Loeffler ,  Randolph Setser ,  Richard White

IPC分类号： A61B5/05 ,  A61B5/055 ,  G01R33/28 ,  G01R33/567

CPC分类号： A61B5/055 ,  A61B5/7289 ,  G01R33/281 ,  G01R33/5673

摘要： A method of magnetic resonance imaging of anatomy that is subject to a movement cycle (e.g., the heart during a cardiac cycle), comprising: administering a magnetic resonance contrast agent; waiting a period of time until the contrast agent is effective to cause selected portions of the anatomy (e.g., macrotic cardiac tissue) to have a different T1 recovery rate from that of other portions (normal cardiac tissue); administering a plurality of inversion recovery pulses spaced in time; acquiring image data at a data acquisition time that is spaced in time by a known time interval following an inversion recovery pulse; varying the time within the movement cycle at which the inversion recovery pulses are administered so that the associated data acquisition times are at a plurality of phases of the movement cycle; processing image data acquired at a phase of the movement cycle to produce at least a portion of an image frame at that phase; and performing the processing for a plurality of phases of the movement cycle to produce a plurality of image frames corresponding to a plurality of phases

摘要翻译： 一种经受运动周期（例如，心脏周期中的心脏）的解剖结构的磁共振成像的方法，包括：施用磁共振造影剂; 等待一段时间，直到造影剂有效地引起解剖结构的选定部分（例如，宏观心脏组织）具有与其它部分（正常心脏组织）不同的T1恢复率; 施用多个时间间隔的反转恢复脉冲; 在与反转恢复脉冲之后的已知时间间隔内以时间间隔的数据获取时间获取图像数据; 改变施加反转恢复脉冲的移动周期内的时间，使得相关联的数据采集时间处于移动周期的多个阶段; 处理在所述移动周期的相位获取的图像数据，以在该阶段产生图像帧的至少一部分; 以及对所述移动周期的多个相位进行处理，以产生与多个相位对应的多个图像帧

公开(公告)号：US06280384B1

公开(公告)日：2001-08-28

申请号：US09292611

申请日：1999-04-15

申请人： Ralf Loeffler

发明人： Ralf Loeffler

IPC分类号： A61B5055

CPC分类号： G01K7/38

摘要： In a method for spatially resolved temperature monitoring in an examination subject, a suspension of ferromagnetic microparticles is intracorporeally introduced into the body Curie temperature of which substance corresponds to a desired temperature limit value. By means of an MR measurement, a spatially resolved representation of the body is obtained with artifacts that are caused by the substance being in the ferromagnetic state being employed as a criterion for determining that the temperature limit value has not yet been reached.

摘要翻译： 在用于检查对象中的空间分辨温度监测的方法中，铁氧体微粒的悬浮体体内引入体内居里温度，该物质对应于所需的温度极限值。 通过MR测量，获得身体的空间分辨表示，其中由作为铁磁状态的物质引起的假象被用作用于确定尚未达到温度极限值的标准。

公开(公告)号：US20070269287A1

公开(公告)日：2007-11-22

申请号：US11659939

申请日：2006-04-21

申请人： Erich Runge ,  Ralf Loeffler

发明人： Erich Runge ,  Ralf Loeffler

IPC分类号： F16B35/00

CPC分类号： F16B25/0047 ,  F16B25/00 ,  F16B25/0015 ,  F16B25/0057 ,  F16B33/02

摘要： A wood and plastic screw has an essentially cylindrical shank, a tip, and a thread extending along the shank as far as into a tip region. The thread comprises a tip-side and a head-side flank, with a head-side flank angle being larger than a tip-side flank angle. The tip-side flank angle remains approximately constant in a shank region and in the tip region whereas the head-side flank angle in the tip region is larger than that in the shank region.

摘要翻译： 木和塑料螺钉具有基本上圆柱形的柄，尖端和沿着柄延伸到尖端区域的螺纹。 螺纹包括尖端侧和头侧侧面，头侧侧面角大于顶端侧面角。 尖端侧面角在柄部区域和尖端区域中保持近似恒定，而顶端区域中的头侧侧面角大于柄部区域中的顶端侧面角。