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公开(公告)号：US09014781B2
公开(公告)日：2015-04-21
申请号：US13451178
申请日：2012-04-19
申请人： Ek Tsoon Tan , Thomas Kwok-Fah Foo , Vincent B. Ho
发明人： Ek Tsoon Tan , Thomas Kwok-Fah Foo , Vincent B. Ho
CPC分类号： A61B5/055 , A61B5/0263
摘要： Systems and methods for Magnetic Resonance Angiography (MRI) are provided. One method includes obtaining Magnetic Resonance (MR) velocity data and determining a distance map for one or more vessels to define a distance path. The method also includes calculating, using the MR velocity data, at a plurality of time intervals and for a plurality of pixels (i) a distance traveled during a current time interval as a current distance traveled, wherein a total distance traveled is incremented by the current distance traveled and (ii) a bolus signal using a bolus signal profile, the distance path and total distance traveled, wherein a current time interval is incremented by a defined time step.
摘要翻译： 提供了磁共振血管造影（MRI）的系统和方法。 一种方法包括获得磁共振（MR）速度数据并且确定一个或多个容器的距离图以限定距离路径。 该方法还包括以多个时间间隔和多个像素（i）计算使用MR速度数据在当前时间间隔内行进的距离作为行进的当前距离，其中行进的总距离增加 当前距离行进，以及（ii）使用推注信号轮廓的推注信号，所述距离路径和所行驶的总距离，其中当前时间间隔增加定义的时间步长。
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公开(公告)号：US20130281829A1
公开(公告)日：2013-10-24
申请号：US13451178
申请日：2012-04-19
申请人： Ek Tsoon Tan , Thomas Kwok-Fah Foo , Vincent B. Ho
发明人： Ek Tsoon Tan , Thomas Kwok-Fah Foo , Vincent B. Ho
IPC分类号： A61B5/055
CPC分类号： A61B5/055 , A61B5/0263
摘要： Systems and methods for Magnetic Resonance Angiography (MRI) are provided. One method includes obtaining Magnetic Resonance (MR) velocity data and determining a distance map for one or more vessels to define a distance path. The method also includes calculating, using the MR velocity data, at a plurality of time intervals and for a plurality of pixels (i) a distance traveled during a current time interval as a current distance traveled, wherein a total distance traveled is incremented by the current distance traveled and (ii) a bolus signal using a bolus signal profile, the distance path and total distance traveled, wherein a current time interval is incremented by a defined time step.
摘要翻译： 提供了磁共振血管造影（MRI）的系统和方法。 一种方法包括获得磁共振（MR）速度数据并且确定一个或多个容器的距离图以限定距离路径。 该方法还包括以多个时间间隔和多个像素（i）计算使用MR速度数据在当前时间间隔内行进的距离作为行进的当前距离，其中行进的总距离增加 当前距离行进，以及（ii）使用推注信号轮廓的推注信号，所述距离路径和所行驶的总距离，其中当前时间间隔增加定义的时间步长。
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3.发明授权Method for adjusting MR scan plane over cardiac cycle to track motion of coronary artery 失效调整心脏周期MR扫描平面跟踪冠状动脉运动的方法
公开(公告)号：US6057680A
公开(公告)日：2000-05-02
申请号：US991820
申请日：1997-12-17
申请人： Thomas Kwok-Fah Foo , Vincent B. Ho
发明人： Thomas Kwok-Fah Foo , Vincent B. Ho
IPC分类号： G01R33/48 , A61B5/055 , G01R33/567 , G01V3/00
CPC分类号： G01R33/4833 , G01R33/5673
摘要： A method is provided for acquiring MR image data pertaining to a coronary artery which is in motion between end-diastolic and end-systolic maximum excursion positions, respectively, during a cardiac cycle. The method comprises the step of tracking the location of the artery during the cardiac cycle as the artery moves between the positions of maximum excursion. The method further comprises acquiring MR data at a number of locations during the cardiac cycle in a region lying between the maximum excursion positions, each having the excitation or acquisition scan locations adjusted during the MR scan so as to substantially coincide with the location of said artery at the time of data acquisition.
摘要翻译： 提供了一种用于在心动周期期间分别获取与冠状动脉相关的MR图像数据的方法，该冠状动脉在舒张末期和收缩期最大偏移位置之间运动。 该方法包括当动脉在最大偏移的位置之间移动时跟踪心动周期期间动脉的位置的步骤。 该方法还包括在位于最大偏移位置之间的区域中的心脏周期的多个位置处获取MR数据，每个位置具有在MR扫描期间调整的激发或采集扫描位置，以便与所述动脉的位置基本一致 在数据采集时。
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公开(公告)号：US08487933B2
公开(公告)日：2013-07-16
申请号：US12961159
申请日：2010-12-06
申请人： Ting Song , Vincent B. Ho
发明人： Ting Song , Vincent B. Ho
CPC分类号： A61B6/00 , A61B5/02007 , A61B5/742 , A61B6/469 , G06T7/0016 , G06T7/246 , G06T7/66 , G06T11/206 , G06T2200/24 , G06T2207/10072 , G06T2207/10132 , G06T2207/30048
摘要： A computer implemented method of mapping of multiple regional center point trajectory movements of cavity walls is provided in which images are acquired and a region-of-interest is identified in each of the images. The region-of-interest is divided into a plurality of distinct regions and a regional center point for each of the regions is located in the images. For each regional center point, a center point trajectory is determined based on variances in position of the center points from each other in the images. The center point trajectory of each regional center point is decomposed into radial and circumferential components so as to isolate radial component of the center point trajectory for each regional center point in each of the images and radial motion versus time curves are displayed for each regional center point based on the determined radial component for each regional center point in each of the images.
摘要翻译： 提供了一种映射空腔壁的多个区域中心点轨迹运动的计算机实现方法，其中获取图像，并且在每个图像中识别感兴趣区域。 感兴趣区域被分成多个不同的区域，并且每个区域的区域中心点位于图像中。 对于每个区域中心点，基于图像中的彼此的中心点的位置的方差确定中心点轨迹。 每个区域中心点的中心点轨迹被分解成径向和圆周分量，以便隔离每个图像中每个区域中心点的中心点轨迹的径向分量，并且针对每个区域中心点显示径向运动与时间曲线 基于每个图像中每个区域中心点的确定的径向分量。
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公开(公告)号：US07880465B2
公开(公告)日：2011-02-01
申请号：US12132706
申请日：2008-06-04
IPC分类号： G01V3/00
CPC分类号： G01R33/5635 , G01R33/4818 , G01R33/4835 , G01R33/5601 , G01R33/5619 , G01R33/56308 , G01R33/56509
摘要： A system and method for MR imaging includes a computer programmed to determine first and second view-ordering sequences. The first and second view-ordering sequences comprise values corresponding to respective views of first and second k-space data sets, respectively, wherein the values corresponding to a central view of each the first and second k-space data sets are positioned such that acquisition of k-space data in each central view is acquired from a first and second anatomical region, respectively, as a contrast agent passes therethrough. The positions of the values corresponding to the central views of the first and second k-space data sets within the respective sequences are different. The computer is further programmed to acquire MR data according to the first and second view-ordering sequences over a series of cardiac cycles to fill data in the first and second k-space data sets, respectively.
摘要翻译： 用于MR成像的系统和方法包括被编程为确定第一和第二视图排序序列的计算机。 第一和第二视图排序序列分别包括对应于第一和第二k空间数据集的各个视图的值，其中对应于每个第一和第二k空间数据集的中心视图的值被定位成使得采集 当造影剂通过时，分别从第一和第二解剖区域获取每个中心视图中的k空间数据。 对应于各序列内的第一和第二k空间数据集的中心视图的值的位置是不同的。 计算机还被编程为分别在一系列心动周期上根据第一和第二视图排序序列获取MR数据，以分别填充第一和第二k空间数据集中的数据。
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公开(公告)号：US06963768B2
公开(公告)日：2005-11-08
申请号：US10063829
申请日：2002-05-16
申请人： Vincent B. Ho , Thomas K. F. Foo
发明人： Vincent B. Ho , Thomas K. F. Foo
IPC分类号： G01R33/28 , A61B5/055 , G01R33/563 , A61B5/05
CPC分类号： G01R33/56375 , A61B5/0555 , G06F19/00
摘要： The present invention includes a method and apparatus for high sensitivity whole body scanning using MR imaging. The invention includes acquiring MR data as the patient moves through the iso-center of the magnet while providing interactive control for the operator to change scan parameters and table motion and direction. The technique allows efficient whole body scanning for fast screening of abnormalities while allowing operator control during the screening process to interrupt table motion and redirect the speed and direction of the table while also allowing control over the acquisition plane, number of sections imaged, inter-section spacing, and the scan location.
摘要翻译： 本发明包括使用MR成像进行高灵敏度全身扫描的方法和装置。 本发明包括当患者移动通过磁体的等中心时获取MR数据，同时为操作者提供交互式控制以改变扫描参数和表格运动和方向。 该技术允许有效的全身扫描快速筛选异常，同时允许操作者在筛选过程中控制中断台面运动并重定向表的速度和方向，同时还允许控制采集平面，成像部分数量，间隔 间距和扫描位置。
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公开(公告)号：US06249694B1
公开(公告)日：2001-06-19
申请号：US09118411
申请日：1998-07-17
IPC分类号： A61B5055
CPC分类号： G01R33/5635 , G01R33/5601 , G01R33/56572
摘要： A method of peripheral MR angiography is provided for imaging an artery or other vessel, wherein the vessel is of such length that MR data must be acquired at each of a plurality of scan stations spaced along the vessel. In accordance with the method, a contrast agent is intravenously injected, in order to provide a bolus which successively flows to each of the scan stations. After acquiring an initial subset of the MR data associated with a given scan station, the bolus is tracked to determine whether it has arrived at the next-following scan station. If so, at least some of the MR data associated with the next scan station are then acquired. However, if it is found that the bolus has not yet arrived at the next scan station, acquisition of further data at the given scan station is continued.
摘要翻译： 提供了一种用于对动脉或其他血管进行成像的外周MR血管造影术的方法，其中所述血管具有这样的长度，使得必须在沿着血管间隔开的多个扫描站中的每一个处获取MR数据。 根据该方法，静脉内注射造影剂，以提供连续流向每个扫描站的推注。 在获取与给定扫描站相关联的MR数据的初始子集之后，跟踪该推注以确定其是否到达下一个扫描站。 如果是，则随后获取与下一个扫描站相关联的至少一些MR数据。 然而，如果发现大剂量尚未到达下一个扫描站，则继续在给定扫描站获取进一步的数据。
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公开(公告)号：US20110075902A1
公开(公告)日：2011-03-31
申请号：US12961159
申请日：2010-12-06
申请人： Ting Song , Vincent B. Ho
发明人： Ting Song , Vincent B. Ho
CPC分类号： A61B6/00 , A61B5/02007 , A61B5/742 , A61B6/469 , G06T7/0016 , G06T7/246 , G06T7/66 , G06T11/206 , G06T2200/24 , G06T2207/10072 , G06T2207/10132 , G06T2207/30048
摘要： A computer implemented method of mapping of multiple regional center point trajectory movements of cavity walls is provided in which images are acquired and a region-of-interest is identified in each of the images. The region-of-interest is divided into a plurality of distinct regions and a regional center point for each of the regions is located in the images. For each regional center point, a center point trajectory is determined based on variances in position of the center points from each other in the images. The center point trajectory of each regional center point is decomposed into radial and circumferential components so as to isolate radial component of the center point trajectory for each regional center point in each of the images and radial motion versus time curves are displayed for each regional center point based on the determined radial component for each regional center point in each of the images.
摘要翻译： 提供了一种映射空腔壁的多个区域中心点轨迹运动的计算机实现方法，其中获取图像，并且在每个图像中识别感兴趣区域。 感兴趣区域被分成多个不同的区域，并且每个区域的区域中心点位于图像中。 对于每个区域中心点，基于图像中的彼此的中心点的位置的方差确定中心点轨迹。 每个区域中心点的中心点轨迹被分解成径向和圆周分量，以便隔离每个图像中每个区域中心点的中心点轨迹的径向分量，并且针对每个区域中心点显示径向运动与时间曲线 基于每个图像中每个区域中心点的确定的径向分量。
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公开(公告)号：US20090302840A1
公开(公告)日：2009-12-10
申请号：US12132706
申请日：2008-06-04
IPC分类号： G01R33/483
CPC分类号： G01R33/5635 , G01R33/4818 , G01R33/4835 , G01R33/5601 , G01R33/5619 , G01R33/56308 , G01R33/56509
摘要： A system and method for MR imaging includes a computer programmed to determine first and second view-ordering sequences. The first and second view-ordering sequences comprise values corresponding to respective views of first and second k-space data sets, respectively, wherein the values corresponding to a central view of each the first and second k-space data sets are positioned such that acquisition of k-space data in each central view is acquired from a first and second anatomical region, respectively, as a contrast agent passes therethrough. The positions of the values corresponding to the central views of the first and second k-space data sets within the respective sequences are different. The computer is further programmed to acquire MR data according to the first and second view-ordering sequences over a series of cardiac cycles to fill data in the first and second k-space data sets, respectively.
摘要翻译： 用于MR成像的系统和方法包括被编程为确定第一和第二视图排序序列的计算机。 第一和第二视图排序序列分别包括对应于第一和第二k空间数据集的各个视图的值，其中对应于每个第一和第二k空间数据集的中心视图的值被定位成使得采集 当造影剂通过时，分别从第一和第二解剖区域获取每个中心视图中的k空间数据。 对应于各序列内的第一和第二k空间数据集的中心视图的值的位置是不同的。 计算机还被编程为分别在一系列心动周期上根据第一和第二视图排序序列获取MR数据，以分别填充第一和第二k空间数据集中的数据。
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公开(公告)号：US06643534B2
公开(公告)日：2003-11-04
申请号：US10098013
申请日：2002-03-13
IPC分类号： A61B5055
CPC分类号： G01R33/563 , G01R33/281
摘要： A system and method for optimally imaging the peripheral vasculature is disclosed which includes defining a given number of scan stations along a patient's peripheral vasculature and initially injecting a relatively small amount of contrast agent into the patient to pass a test bolus through the patient's peripheral vasculature, and thereafter tracking the test bolus through the patient and adjusting the patient on a moveable table within the MR imaging device from one scan station to a next station to determine a maximum travel time that the test bolus takes to travel through each of the given number of scan stations. Additional contrast agent is then injected into the patient to pass an exam bolus through the patient's peripheral vasculature, and using the test bolus travel time, MR data can be acquired from each scan station while it is known that the exam bolus is present in that station to optimize image resolution. Initially, central k-space data is acquired for each scan station, and if time permits, the higher spatial frequency k-space data can be acquired. Otherwise, once the central k-space data is acquired for each station, the patient table is adjusted to the scan stations that require additional data acquisition. Similarly, if there is time remaining after all MR data is acquired for a particular scan station, the patient table can be moved to a previous scan station to acquire additional data in that station before moving to a subsequent scan station to acquire the central k-space data when the exam bolus arrives in that particular scan station.
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