-
31.发明申请公开(公告)号：US20100085051A1
公开(公告)日：2010-04-08
申请号：US12571540
申请日：2009-10-01
IPC分类号： G01R33/48
CPC分类号： A61B5/055 , A61B5/7285 , G01R33/281 , G01R33/56 , G01R33/5601 , G01R33/5602 , G01R33/5608 , G01R33/563 , G01R33/56325 , G01R33/56366
摘要： In a method to determine an inversion time value for contrast improvement between different tissue in a contrast agent-supported magnetic resonance imaging, a series of magnetic resonance images of an imaging area is acquired using an inversion recovery sequence with different inversion times. A structure in the magnetic resonance images is segmented and a time response of the signal intensity of image elements corresponding to one another in the magnetic resonance images of the segmented structure is automatically determined. Minima of the signal intensity in the segmented structure are determined automatically and associated with the associated inversion time values. The optimal inversion time value for contrast improvement is automatically determined from the inversion time values that have been associated with the minima of the signal intensity in the segmented structure.
摘要翻译： 在用于确定造影剂支持的磁共振成像中的不同组织之间的对比度改善的反转时间值的方法中，使用具有不同反转时间的反转恢复序列来获取成像区域的一系列磁共振图像。 分割磁共振图像中的结构，并且自动确定在分段结构的磁共振图像中彼此对应的图像元素的信号强度的时间响应。 自动确定分段结构中的信号强度的最小值，并与相关的反转时间值相关联。 根据与分段结构中的信号强度的最小值相关联的反转时间值自动确定对比度改善的最佳反演时间值。
-
32.发明授权Magnetic resonance imaging apparatus and method wherein streak artifacts are minimized in modular k-space scanning 有权磁共振成像装置和方法，其中在模块化k空间扫描中条纹伪影最小化公开(公告)号：US07245125B2
公开(公告)日：2007-07-17
申请号：US10921021
申请日：2004-08-18
申请人： Wolfgang Härer , Peter Speier
发明人： Wolfgang Härer , Peter Speier
IPC分类号： G01V3/00
CPC分类号： G01R33/565 , G01R33/4824 , G01R33/56518 , G01R33/56545
摘要： In a method and MRI apparatus for the minimization of streak artifacts in modular k-space scanning in magnetic resonance imaging, an odd integer k-space scanning module number Nφ=2n+1 is defined that defines the number of incrementally rotated repeated modules of the k-space scanning process, a slice selection gradient selects any slice in the range of the object to be examined, and data for all Nφ angle-oriented k-space scanning modules in the selected slice acquired such that each k-space scanning module has an azmuthal distance of Δ φ 2 = 360 ° 2 N φ from both adjacent projections, with the direction of the scanning of the adjacent k-space scanning modules alternating.
摘要翻译： 在用于使磁共振成像中的模块化k空间扫描中的条纹伪影最小化的方法和MRI装置中，定义了奇整数k空间扫描模块编号N k空间扫描处理的递增旋转的重复模块的数量，切片选择梯度选择待检查对象的范围内的任何切片，以及用于所有N＆lt; phi＆lt; 所选择的片段中的扫描模块被采集，使得每个k空间扫描模块的azmuthal距离为
-
33.发明申请Calibrating method for artifact-reduced MRT imaging when there is FOV displacement 有权当有FOV位移时，用于伪影MRT成像的校准方法公开(公告)号：US20060253018A1
公开(公告)日：2006-11-09
申请号：US11410630
申请日：2006-04-25
申请人： Peter Speier , Florian Trautwein
发明人： Peter Speier , Florian Trautwein
IPC分类号： A61B5/05
CPC分类号： G01R33/565 , G01R33/4824 , G01R33/561 , G01R33/58
摘要： The present invention relates generally to nuclear magnetic resonance tomography (synonym: magnetic resonance tomography—MRT) as used in medical applications for examining patients; it relates in particular to a calibrating method when there is FOV displacement within a plane through angle-dependent modulating of the phase of the Fourier DC point of the respective read-out direction in MRT imaging for determining the device-specific dependency of the time delay requiring to be compensated between the reference signal effecting modulation and the read-out measuring data points of the respective read-out direction of settable measurement parameters.
摘要翻译： 本发明一般涉及用于检查患者的医疗应用中使用的核磁共振断层扫描（同义词：磁共振断层扫描-MRT）; 特别涉及一种校准方法，当在MRT成像中通过与MRT成像中的相应读出方向的傅里叶DC点相位相关的角度相关调制在平面内存在FOV位移时，用于确定时间延迟的器件特定依赖性 需要在参考信号影响调制与可设置测量参数的相应读出方向的读出测量数据点之间进行补偿。
-
34.发明授权公开(公告)号：US06566874B1
公开(公告)日：2003-05-20
申请号：US09356844
申请日：1999-07-19
IPC分类号： G01V300
CPC分类号： G01N24/081 , G01V3/32
摘要： An NMR measurement apparatus is potentially subject to relative motion between the apparatus and a sample. The measurement apparatus includes at least one magnet, at least one coil and circuitry that is coupled to the magnet(s) and coil(s). The circuitry is adapted to use the magnet(s) and coil(s) to perform at least one NMR measurement and indicate the results of the NMR measurement(s). The results are then analyzed to determine an effect of the motion on the measurement(s).
摘要翻译： NMR测量装置潜在地受到装置和样品之间的相对运动。 测量装置包括至少一个磁体，至少一个线圈和耦合到磁体和线圈的电路。 电路适于使用磁体和线圈进行至少一个NMR测量并指示NMR测量的结果。 然后分析结果以确定运动对测量的影响。
-
公开(公告)号：US09645216B2
公开(公告)日：2017-05-09
申请号：US13757446
申请日：2013-02-01
申请人： Björn Heismann , Mathias Nittka , Peter Speier , Aurélien Stalder
发明人： Björn Heismann , Mathias Nittka , Peter Speier , Aurélien Stalder
IPC分类号： G01V3/00 , G01R33/54 , G01R33/38 , G01R33/385 , G01R33/565
CPC分类号： G01R33/543 , G01R33/38 , G01R33/3854 , G01R33/56518
摘要： A method and a measuring-sequence-determining device for determining a measuring sequence for a magnetic resonance system based on at least one intra-repetition-interval time parameter are provided. During the determination of the measuring sequence in a gradient-optimization method, gradient-pulse parameters of the measuring sequence are automatically optimized to reduce at least one gradient-pulse-parameter maximum value. As a boundary condition in the gradient-optimization method, the intra-repetition-interval time parameter is kept constant at least within a specified tolerance value.
-
36.发明申请METHOD AND MAGNETIC RESONANCE APPARATUS TO REDUCE MOVEMENT ARTIFACTS IN MAGNETIC RESONANCE IMAGES 有权方法和磁共振装置减少磁共振图像中的运动装置公开(公告)号：US20140015528A1
公开(公告)日：2014-01-16
申请号：US13940447
申请日：2013-07-12
申请人： Wilfried Landschuetz , Peter Speier
发明人： Wilfried Landschuetz , Peter Speier
IPC分类号： G01R33/565
CPC分类号： G01R33/56509 , G01R33/3415
摘要： In a method and apparatus to reduce movement artifacts in magnetic resonance images an essentially unmoving area of a region to be imaged is located in a region of high sensitivity of a first group of individual local antennas, and a moving area is located in the region of high sensitivity of a second group of local antennas. Spatially coded magnetic resonance signals are received by a first group of the local antennas and are individually processed further. Spatially coded nuclear magnetic resonance signals are received by the second group of local antennas and are combined with a weighting, using weighting factors. The weighting factors are determined so as to reduce gradient of the weighted, combined, spatially dependent sensitivity of the local antennas of the second group.
摘要翻译： 在减少磁共振图像中的运动伪影的方法和装置中，要成像的区域的基本上不移动的区域位于第一组单独本地天线的高灵敏度区域中，并且移动区域位于 第二组本地天线的高灵敏度。 空间编码的磁共振信号由第一组本地天线接收，并被进一步分别处理。 空间编码的核磁共振信号由第二组本地天线接收，并且使用加权因子与加权组合。 确定加权因子以减少第二组的本地天线的加权的，组合的，空间依赖的灵敏度的梯度。
-
37.发明申请Cardiac Chamber Volume Computation from Contours and Base Plane in Cardiac MR Cine Images 有权心脏MR电影图像中的轮廓和基础平面的心室容量计算公开(公告)号：US20130259337A1
公开(公告)日：2013-10-03
申请号：US13246002
申请日：2011-09-27
申请人： Jens Gühring , Marie-Pierre Jolly , Christoph Guetter , Xiaoguang Lu , Carmel Hayes , Peter Speier , Davide Piccini
发明人： Jens Gühring , Marie-Pierre Jolly , Christoph Guetter , Xiaoguang Lu , Carmel Hayes , Peter Speier , Davide Piccini
CPC分类号： G06T7/602 , G06T7/0012 , G06T7/62 , G06T2200/04 , G06T2207/10076 , G06T2207/30048
摘要： A system receives cardiac cine MR images consists of multiple slices of the heart over time. A series of short axis images slices are received. Long axis images are also received by the system, wherein a base plane defined by landmark points is detected. An intersection of the base plane with a contour of a heart chamber is determined for a plurality of slices in the short axis image. A volume for each of the contour slices covering the heart chamber, including for contours that are limited by base plane intersections, is evaluated. All slice volumes are summed to determine a total volume of the chamber. In one embodiment the chamber is a left ventricle and the landmark is a mitral valve. An ejection factor is determined.
摘要翻译： 一个系统接收心脏电影MR图像由心脏的多个切片随时间组成。 接收一系列短轴图像切片。 长轴图像也由系统接收，其中检测由地标点定义的基本平面。 针对短轴图像中的多个切片确定基面与心室的轮廓的交点。 评估覆盖心室的每个轮廓切片的体积，包括对于由基面交点进行限制的轮廓。 将所有切片体积相加以确定腔室的总体积。 在一个实施例中，腔室是左心室，并且地标是二尖瓣。 确定射血因子。
-
公开(公告)号：US07903858B2
公开(公告)日：2011-03-08
申请号：US11926912
申请日：2007-10-29
申请人： Ti-chiun Chang , Jiayu Song , Tong Fang , Peter Speier , Edgar Müller
发明人： Ti-chiun Chang , Jiayu Song , Tong Fang , Peter Speier , Edgar Müller
CPC分类号： G01R33/56 , G01R33/4824 , G01R33/5608
摘要： A set of image-space data is reconstructed from a set of k-space data. The set of image-space data is generated by minimizing a cost functional by an iterative non-linear conjugate gradient process. The iterative process may be accelerated by introducing k-space weighting to the cost functional. With proper choice of k-space weighting, a block-Toeplitz matrix is generated which permits use of Fast Fourier Transform techniques. An image is rendered from the set of image-space data.
摘要翻译： 从一组k空间数据重建一组图像空间数据。 通过使迭代非线性共轭梯度过程的功能最小化来生成图像空间数据集合。 可以通过向成本函数引入k空间加权来加速迭代过程。 通过适当选择k空间加权，生成块Toeplitz矩阵，其允许使用快速傅里叶变换技术。 从图像空间数据集中呈现图像。
-
公开(公告)号：US20080107319A1
公开(公告)日：2008-05-08
申请号：US11926912
申请日：2007-10-29
申请人： Ti-chiun Chang , Jiayu Song , Tong Fang , Peter Speier , Edgar Muller
发明人： Ti-chiun Chang , Jiayu Song , Tong Fang , Peter Speier , Edgar Muller
IPC分类号： G06K9/00
CPC分类号： G01R33/56 , G01R33/4824 , G01R33/5608
摘要： A set of image-space data is reconstructed from a set of k-space data. The set of image-space data is generated by minimizing a cost functional by an iterative non-linear conjugate gradient process. The iterative process may be accelerated by introducing k-space weighting to the cost functional. With proper choice of k-space weighting, a block-Toeplitz matrix is generated which permits use of Fast Fourier Transform techniques. An image is rendered from the set of image-space data.
摘要翻译： 从一组k空间数据重建一组图像空间数据。 通过使迭代非线性共轭梯度过程的功能最小化来生成图像空间数据集合。 可以通过向成本函数引入k空间加权来加速迭代过程。 通过适当选择k空间加权，生成块Toeplitz矩阵，其允许使用快速傅里叶变换技术。 从图像空间数据集中呈现图像。
-
40.发明申请公开(公告)号：US20060241379A1
公开(公告)日：2006-10-26
申请号：US11324376
申请日：2006-01-03
IPC分类号： A61B5/05
CPC分类号： A61B5/055 , G01R33/563 , G06T11/005 , G06T2211/412
摘要： In a method for imaging a periodically-moving subject region of a subject, an overview image data set is initially obtained that maps a movement of the subject region, at least two positions that the subject region assumes at corresponding points in time are marked in the overview image, further positions of the subject region at further points in time are interpolated from the marked positions and further points in time, and a subsequent diagnostic imaging of the moving subject region is implemented using the marked and interpolated positions.
摘要翻译： 在用于成像对象的周期性移动的被摄体区域的方法中，首先获得映射被摄体区域的移动的概览图像数据集，在对象区域在相应的时间点呈现的至少两个位置被标记在 在标记的位置和进一步的时间点内插进一步的时间点的主题区域的其他位置，并且使用标记和内插位置来实现移动对象区域的后续诊断成像。
-
-
-
-
-
-
-
-
-
搜索结果
90 条记录 (耗时 0.022 秒)