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1.发明授权System and method of angular elliptic centric view ordering for 3D MR acquisitions 有权用于3D MR采集的角椭圆中心视图排序的系统和方法公开(公告)号：US08120360B2
公开(公告)日：2012-02-21
申请号：US12568355
申请日：2009-09-28
IPC分类号： G01V3/00
CPC分类号： G01R33/56518 , G01R33/4818 , G01R33/4822 , G01R33/4824
摘要： A method of magnetic resonance (MR) imaging includes segmenting a ky-kz plane comprising a plurality of encoding points into a plurality of annular segments. For each annular segment, a view ordering is defined based on a polar angle associated with each encoding point contained within the annular segment. MR data is acquired for the plurality of encoding points based on the view ordering for each annular segment and at least one MR image is generated using the acquired MR data.
摘要翻译： 磁共振（MR）成像方法包括将包含多个编码点的ky-kz平面分割成多个环形段。 对于每个环形段，视图排序基于与包含在环形段内的每个编码点相关联的极角来定义。 基于每个环形段的视图顺序为多个编码点获取MR数据，并且使用获取的MR数据生成至少一个MR图像。
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2.发明授权Method and apparatus for automated tracking of vessel movement using MR imaging 有权使用MR成像自动跟踪血管运动的方法和装置公开(公告)号：US08380284B2
公开(公告)日：2013-02-19
申请号：US11625054
申请日：2007-01-19
IPC分类号： A61B5/05
CPC分类号： G01R33/56509 , A61B5/0037 , A61B5/055 , A61B5/7285 , G01R33/56 , G01R33/5673
摘要： A system and method is disclosed for tracking a moving object using magnetic resonance imaging. The technique includes acquiring a scout image scan having a number of image frames and extracting non-linear motion parameters from the number of image frames of the scout image scan. The technique includes prospectively shifting slice location using the non-linear motion parameters between slice locations while acquiring a series of MR images. The system and method are particularly useful in tracking coronary artery movement during the cardiac cycle to acquire the non-linear components of coronary artery movement during a diastolic portion of the R-R interval.
摘要翻译： 公开了一种使用磁共振成像跟踪运动物体的系统和方法。 该技术包括获取具有多个图像帧的侦察图像扫描，并从侦察图像扫描的图像帧的数量中提取非线性运动参数。 该技术包括使用切片位置之间的非线性运动参数前进移位切片位置，同时获取一系列MR图像。 该系统和方法在心脏周期期间跟踪冠状动脉运动特别有用，以在R-R间期的舒张期期间获得冠状动脉运动的非线性分量。
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3.发明授权Multi-slice MR data acquisition in successive heartbeats with black blood contrast 有权连续心跳的多片MR数据采集与黑血对比公开(公告)号：US07412277B1
公开(公告)日：2008-08-12
申请号：US10604829
申请日：2003-08-20
IPC分类号： A61B5/05
CPC分类号： G01R33/5673 , A61B5/055 , G01R33/4835 , G01R33/5602 , G01R33/5607 , G01R33/561 , G01R33/5617 , G01R33/563 , G01R33/56509
摘要： The invention includes a technique for efficient multi-slice image acquisition with black blood contrast in cardiac imaging such that MR data is acquired in each R-R interval of a cardiac cycle. The technique includes applying a non-selective inversion pulse, followed by a re-inversion pulse that is slice-selective over a region encompassing a plurality of slice selections. The inversion and re-inversion pulses are applied in each R-R interval. Execution of a series of RF excitation pulses in each R-R interval is timed such that signal from blood is near a null point before data acquisition.
摘要翻译： 本发明包括一种用于在心脏成像中具有黑色血液对比度的高效多切片图像采集的技术，使得在心脏周期的每个R-R间隔中获取MR数据。 该技术包括应用非选择性反转脉冲，随后是在包围多个切片选择的区域上切片选择的重新反转脉冲。 在每个R-R间隔中施加反转和反转脉冲。 在每个R-R间隔中执行一系列RF激励脉冲的定时，使得来自血液的信号在数据采集之前接近零点。
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公开(公告)号：US06980846B2
公开(公告)日：2005-12-27
申请号：US09681406
申请日：2001-03-30
CPC分类号： G01R33/5635 , G01R33/4824 , G01R33/56308 , G01R33/56509 , G01R33/5676
摘要： A method for acquiring image data from a subject during a scan with a Magnetic Resonance Imaging (MRI) system comprising the steps of acquiring a reference data set of a region of interest, acquiring a plurality of free-breathing data sets, and, selectively processing the plurality of free-breathing data sets in comparison with the reference data set to be used in creating an image of the region of interest. The reference data set comprises breath-held data set or, alternatively, free-breathing data.
摘要翻译： 一种用于在使用磁共振成像（MRI）系统的扫描期间从被摄体获取图像数据的方法，包括以下步骤：获取感兴趣区域的参考数据集，获取多个自由呼吸数据集，以及选择性处理 多个自由呼吸数据集与用于创建感兴趣区域的图像的参考数据组相比较。 参考数据集包括呼吸数据集，或者替代地，自由呼吸数据。
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公开(公告)号：US06889071B2
公开(公告)日：2005-05-03
申请号：US09681068
申请日：2000-12-19
IPC分类号： G01R33/48 , A61B5/055 , G01R33/567 , A61B5/05
CPC分类号： G01R33/567
摘要： A system and method are disclosed to acquire high temporal resolution free-breathing cardiac MR images. The technique includes monitoring heart rate of a patient just prior to image acquisition to acquire a time period of an R—R interval, and using this time period from the heart rate monitoring to prospectively estimate future R—R intervals. The acquisition of MR data can then commence at any point in an R—R interval and extend for the time period recorded. The data acquisition can be segmented and acquired in successive R—R intervals, then combined to create high temporal resolution images.
摘要翻译： 公开了一种获得高时间分辨率自由呼吸心脏MR图像的系统和方法。 该技术包括在图像获取之前监测患者的心率以获取R-R间期的时间段，并且使用来自心率监测的该时间段来前瞻性地估计未来的R-R间期。 然后可以在R-R间隔中的任何点开始获取MR数据，并延长记录的时间段。 可以在连续的R-R间隔中对数据采集进行分段和采集，然后组合以创建高时间分辨率图像。
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公开(公告)号：US20060052688A1
公开(公告)日：2006-03-09
申请号：US11246725
申请日：2005-10-06
IPC分类号： A61B5/05
CPC分类号： G01R33/5635 , G01R33/4824 , G01R33/56308 , G01R33/56509 , G01R33/5676
摘要： A method for acquiring image data from a subject during a scan with a Magnetic Resonance Imaging (MRI) system comprising the steps of acquiring a reference data set of a region of interest, acquiring a plurality of free-breathing data sets, and, selectively processing the plurality of free-breathing data sets in comparison with the reference data set to be used in creating an image of the region of interest. The reference data set comprises breath-held data set or, alternatively, free-breathing data.
摘要翻译： 一种用于在使用磁共振成像（MRI）系统的扫描期间从被摄体获取图像数据的方法，包括以下步骤：获取感兴趣区域的参考数据集，获取多个自由呼吸数据集，以及选择性处理 多个自由呼吸数据集与用于创建感兴趣区域的图像的参考数据组相比较。 参考数据集包括呼吸数据集，或者替代地，自由呼吸数据。
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公开(公告)号：US06265875B1
公开(公告)日：2001-07-24
申请号：US09313107
申请日：1999-05-17
IPC分类号： G01V300
CPC分类号： G01R33/446 , G01R33/4838
摘要： The present invention relates generally to magnetic resonance imaging (MRI), and more particularly to a method and apparatus for efficient MRI tissue differentiation using an RF pulse designed to provide a frequency response combining a magnetization transfer contrast and fat saturation simultaneously. The invention includes creating a spectrally selective suppression pulse having an RF pulse profile designed to produce a frequency response with adequate fat suppression and selecting a spectrally selective suppression amplitude to produce a magnetization transfer contrast between two different tissue types, such as between proteinated tissue and water-based tissue. The invention also includes applying the spectrally selective suppression pulse with a flip angle selected to optimize fat suppression and magnetization transfer contrast saturation simultaneously. The invention is particularly useful in magnetic resonance angiography (MRA) as a non-invasive alternative to x-ray angiography to image coronary arteries. The invention is capable of efficiently suppressing fat and myocardium and provide an MR image with enhanced visibility of cardiac vessels.
摘要翻译： 本发明一般涉及磁共振成像（MRI），更具体地涉及一种使用RF脉冲进行有效的MRI组织分化的方法和装置，该RF脉冲旨在同时提供组合磁化转移对比度和脂肪饱和度的频率响应。 本发明包括产生具有RF脉冲分布的频谱选择性抑制脉冲，该RF脉冲分布被设计成产生具有足够脂肪抑制的频率响应，并且选择光谱选择性抑制幅度以产生两种不同组织类型之间的磁化转移对比度，例如在蛋白质组织和水之间 的组织。 本发明还包括应用具有被选择用于同时优化脂肪抑制和磁化转移对比饱和度的翻转角的光谱选择性抑制脉冲。 本发明在磁共振血管造影术（MRA）中作为影像冠状动脉的X射线血管造影术的非侵入性替代物是特别有用的。 本发明能够有效地抑制脂肪和心肌，并提供具有增强的心脏血管可见性的MR图像。
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公开(公告)号：US07714575B2
公开(公告)日：2010-05-11
申请号：US12098866
申请日：2008-04-07
IPC分类号： G01V3/00
CPC分类号： G01R33/54 , G01R33/4818 , G01R33/5607 , G01R33/563 , G01R33/5635
摘要： The present invention provides a system and method of enhanced magnetic preparation in MR imaging. An imaging technique is disclosed such that k-space is segmented into a number of partitions, wherein the central regions of k-space is acquired prior to the periphery of k-space. The imaging technique also includes the application of magnetic preparation pulses at a variable rate. In this regard, the rate of application of magnetic preparations pulses is varied as a function of the distance from the center of k-space. The amplitude of the magnetic preparation pulses is also varied based on the incremental distance of a partition from the center of k-space.
摘要翻译： 本发明提供了一种在MR成像中增强磁性制备的系统和方法。 公开了一种成像技术，使得k空间被分割成多个分区，其中在空间的周边之前获取k空间的中心区域。 成像技术还包括以可变速率应用磁性制备脉冲。 在这方面，磁性制剂脉冲的施加速率随着与k空间中心的距离而变化。 磁准备脉冲的幅度也根据分区与k空间中心的增量距离而变化。
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公开(公告)号：US20080224697A1
公开(公告)日：2008-09-18
申请号：US12098866
申请日：2008-04-07
IPC分类号： G01R33/48
CPC分类号： G01R33/54 , G01R33/4818 , G01R33/5607 , G01R33/563 , G01R33/5635
摘要： The present invention provides a system and method of enhanced magnetic preparation in MR imaging. An imaging technique is disclosed such that k-space is segmented into a number of partitions, wherein the central regions of k-space is acquired prior to the periphery of k-space. The imaging technique also includes the application of magnetic preparation pulses at a variable rate. In this regard, the rate of application of magnetic preparations pulses is varied as a function of the distance from the center of k-space. The amplitude of the magnetic preparation pulses is also varied based on the incremental distance of a partition from the center of k-space.
摘要翻译： 本发明提供了一种在MR成像中增强磁性制备的系统和方法。 公开了一种成像技术，使得k空间被分割成多个分区，其中在空间的周边之前获取k空间的中心区域。 成像技术还包括以可变速率应用磁性制备脉冲。 在这方面，磁性制剂脉冲的施加速率随着与k空间中心的距离而变化。 磁准备脉冲的幅度也根据分区与k空间中心的增量距离而变化。
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10.发明授权Method and apparatus for efficient stenosis identification and assessment using MR imaging 有权使用MR成像进行有效狭窄识别和评估的方法和装置公开(公告)号：US06741880B1
公开(公告)日：2004-05-25
申请号：US09595117
申请日：2000-06-16
IPC分类号： A61B505
CPC分类号： G01R33/54 , A61B5/0263 , G01R33/56
摘要： A method and apparatus is disclosed in which a two-tiered approach is taken to first grade a patient to identify the presence of any suspected stenosis, and then a second step is used to acquire more detailed information to grade the stenosis. The invention includes performing a screening study by acquiring a first MR image having a low resolution to scan a suspected stenosis region. After analyzing the first MR image to identify a suspected stenosis within the suspected stenosis region, a more detailed study is performed by acquiring a second MR image having a higher resolution than the first MR image to scan the identified suspected stenosis. If no lesions, or stenotic vessels, are identified after the first MR image, the second MR image need not be obtained. Since the first MR image is designed to be more sensitive to the detection of such stenosis, by increasing the conspicuity of the lesions, and using a fast acquisition sequence, this two-tiered approach increases the efficiency for accurate coronary artery stenosis detection and assessment.
摘要翻译： 公开了一种方法和装置，其中采用双层方法来对患者进行一级评分，以确定是否存在任何可疑的狭窄，然后使用第二步来获得更详细的信息以对狭窄进行分级。 本发明包括通过获取具有低分辨率的第一MR图像来扫描疑似狭窄区域来进行筛选研究。 在分析第一MR图像以识别可疑狭窄区域中的可疑狭窄之后，通过获取具有比第一MR图像更高分辨率的第二MR图像来扫描所识别的疑似狭窄来进行更详细的研究。 如果在第一MR图像之后没有识别病变或狭窄血管，则不需要获得第二MR图像。 由于第一MR图像被设计为对这种狭窄的检测更敏感，通过增加病变的显着性并使用快速采集序列，这种双层方法提高了精确的冠状动脉狭窄检测和评估的效率。
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