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1.发明授权Inherent limitation of the reduction factor in parallel imaging as a function of field strength 失效作为场强的函数的平行成像中的还原因子的固有限制公开(公告)号：US07061238B2
公开(公告)日：2006-06-13
申请号：US10514437
申请日：2003-05-12
IPC分类号： G01V3/00
CPC分类号： G01R33/5611
摘要： A magnetic resonance imaging system comprises means for generating a main magnetic field with a main magnetic field strength an a plurality of magnetic resonance signal receiving positions, provided by one or more receiver antennae. The receiver antennae or coils have a spatial sensitivity profile for acquiring magnetic resonance signals at a predetermined degree of undersampling. Further means for reconstructing a magnetic resonance image from the set of undersampled magnetic resonance signals and the spatial sensitivity profiles are provided. In addition, means are provided for determining the degree of undersampling (R) in dependency of the given main field strength (B0) and the selected field-of-view (FOV).
摘要翻译： 磁共振成像系统包括用于产生具有由一个或多个接收器天线提供的多个磁共振信号接收位置的主磁场强度的主磁场的装置。 接收器天线或线圈具有用于以预定的欠采样程度采集磁共振信号的空间灵敏度分布。 提供了用于从一组欠采样的磁共振信号重构磁共振图像和空间灵敏度分布的装置。 此外，提供了用于根据给定的主场强（B 0）和所选择的视场（FOV）来确定欠采样（R）的程度的装置。
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2.发明申请Inherent limitation of the reduction factor in parallel imaging as a function of field strength 失效作为场强的函数的平行成像中的还原因子的固有限制公开(公告)号：US20050179433A1
公开(公告)日：2005-08-18
申请号：US10514437
申请日：2003-05-12
IPC分类号： G01R33/48 , A61B5/055 , G01R33/561 , G01V3/00
CPC分类号： G01R33/5611
摘要： A magnetic resonance imaging system comprises means for generating a main magnetic field with a main magnetic field strength an a plurality of magnetic resonance signal receiving positions, provided by one or more receiver antennae. The receiver antennae or coils have a spatial sensitivity profile for acquiring magnetic resonance signals at a predetermined degree of undersampling. Further means for reconstructing a magnetic resonance image from the set of undersampled magnetic resonance signals and the spatial sensitivity profiles are provided. In addition, means are provided for determining the degree of undersampling (R) in dependency of the given main field strength (B0) and the selected field-of-view (FOV).
摘要翻译： 磁共振成像系统包括用于产生具有由一个或多个接收器天线提供的多个磁共振信号接收位置的主磁场强度的主磁场的装置。 接收器天线或线圈具有用于以预定的欠采样程度采集磁共振信号的空间灵敏度分布。 提供了用于从一组欠采样的磁共振信号重构磁共振图像和空间灵敏度分布的装置。 此外，提供了用于根据给定的主场强（B 0）和所选择的视场（FOV）来确定欠采样（R）的程度的装置。
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公开(公告)号：US20110101979A1
公开(公告)日：2011-05-05
申请号：US12638491
申请日：2009-12-15
IPC分类号： G01R33/48
CPC分类号： G01R33/3621 , G01R33/5602 , G01R33/5614 , G01R33/56366
摘要： An imaging system including an imaging apparatus having a plurality of coils, wherein an imaging target is at least partially disposed proximate the coils with at least one excitation source providing pulse sequences. A switch switchably connects the pulse sequences from the excitation source to the coils and switchably connecting to spatially encoded images from the coils during data acquisition. There is an amplified radiation damping feedback section providing amplified radiation damping feedback to the imaging target, wherein the amplified radiation damping feedback provides recovery of longitudinal magnetization subsequent to the data acquisition, and a receiver section for processing the spatially encoded images.
摘要翻译： 一种成像系统，包括具有多个线圈的成像设备，其中成像目标至少部分地布置在具有至少一个提供脉冲序列的激励源的线圈附近。 开关可切换地连接来自激励源的脉冲序列到线圈，并且在数据采集期间可切换地连接到来自线圈的空间编码图像。 存在放大的辐射阻尼反馈部分，其向成像目标提供放大的辐射阻尼反馈，其中放大的辐射阻尼反馈提供在数据采集之后的纵向磁化的恢复，以及用于处理空间编码的图像的接收器部分。
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4.发明授权System and method for correcting flow velocity measurements in phase contrast imaging using magnetic field monitoring 有权用于使用磁场监测校正相差成像中的流速测量的系统和方法公开(公告)号：US07847545B2
公开(公告)日：2010-12-07
申请号：US12101279
申请日：2008-04-11
申请人： Florian Wiesinger , Thomas K. F. Foo , Mika Vogel , Dirk Lange
发明人： Florian Wiesinger , Thomas K. F. Foo , Mika Vogel , Dirk Lange
IPC分类号： G01V3/00
CPC分类号： G01R33/56316 , G01R33/243 , G01R33/56518 , G01R33/56581
摘要： A system and method of phase contrast imaging includes a system control programmed to acquire a first set of data and a second set of data via the RF coil assembly during a scan and acquire a third set of data and a fourth set of data via the plurality of magnetic field monitoring devices during the scan. A first single data set from the first and third sets of data is formed, and a second single data set from the second and fourth sets of data is formed. The system control is also programmed to reconstruct a phase contrast image based on the first and second single data sets to correct for spatially-dependent background phase variations.
摘要翻译： 相位对比成像的系统和方法包括被编程以在扫描期间经由RF线圈组件获取第一组数据和第二组数据的系统控制，并经由多个数据采集第三组数据和第四组数据 的磁场监测装置。 形成来自第一和第三组数据的第一单个数据集，并且形成来自第二和第四组数据的第二单个数据集。 系统控制也被编程为基于第一和第二单个数据集重建相位对比图像，以校正空间相关的背景相位变化。
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5.发明授权Attenuation correction in positron emission tomography using magnetic resonance imaging 有权使用磁共振成像的正电子发射断层扫描中的衰减校正公开(公告)号：US09204817B2
公开(公告)日：2015-12-08
申请号：US13451250
申请日：2012-04-19
申请人： Sheshadri Thiruvenkadam , Dattesh Dayanand Shanbhag , Rakesh Mullick , Florian Wiesinger , Sandeep Suryanarayana Kaushik
发明人： Sheshadri Thiruvenkadam , Dattesh Dayanand Shanbhag , Rakesh Mullick , Florian Wiesinger , Sandeep Suryanarayana Kaushik
IPC分类号： A61B5/055 , G01R33/48 , G01R33/563 , A61B6/03 , G01R33/485 , G01R33/56 , A61B6/00
CPC分类号： A61B5/055 , A61B5/0035 , A61B6/037 , A61B6/463 , A61B6/5247 , A61B6/582 , G01R33/481 , G01R33/485 , G01R33/5602 , G01R33/56383
摘要： In one embodiment, a method includes performing a magnetic resonance (MR) imaging sequence to acquire MR image slices or volumes of a first station representative of a portion of a patient; applying a first phase field algorithm to the first station to determine a body contour of the patient in the first station; identifying a contour of a first anatomy of interest within the body contour of the first station using the first phase field algorithm or a second phase field algorithm; segmenting the first anatomy of interest based on the identified contour of the first anatomy of interest; correlating first attenuation information to the segmented first anatomy of interest; and modifying a positron emission tomography (PET) image based at least on the first correlated attenuation information.
摘要翻译： 在一个实施例中，一种方法包括执行磁共振（MR）成像序列以获取表示患者的一部分的第一站的MR图像切片或体积; 将第一相位场算法应用于所述第一站以确定所述第一站中的所述患者的身体轮廓; 使用第一相位场算法或第二相位算法，在第一站的身体轮廓内识别感兴趣的第一解剖结构的轮廓; 基于感兴趣的第一解剖结构的识别轮廓来分割感兴趣的第一解剖结构; 将第一衰减信息与感兴趣的分段的第一解剖结构相关联; 以及至少基于所述第一相关衰减信息修改正电子发射断层摄影（PET）图像。
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公开(公告)号：US20140039299A1
公开(公告)日：2014-02-06
申请号：US13563724
申请日：2012-07-31
IPC分类号： A61B5/055
CPC分类号： A61B5/055 , A61B5/062 , G01R33/287
摘要： Embodiments of a method, a tracking system, an MRI system, and a non-transitory computer readable medium that stores instructions for simultaneous imaging and tracking are presented. A designated signal and one or more characteristics corresponding to a plurality of imaging gradient waveforms are received. Further, a tracking pulse sequence is synchronized with an imaging pulse sequence at a determined point based on the designated signal. The tracking pulse sequence is then applied simultaneously with the imaging pulse sequence for acquiring corresponding response signals from an interventional device that includes at least one tracking coil and a tracking source configured to generate response signals at a tracking resonant frequency different from an imaging resonant frequency. A location of the tracking coil within or outside body of a subject is determined based on the response signals received from the tracking source and the characteristics corresponding to the imaging gradient waveforms.
摘要翻译： 呈现存储用于同时成像和跟踪的指令的方法，跟踪系统，MRI系统和非暂时性计算机可读介质的实施例。 接收与多个成像梯度波形相对应的指定信号和一个或多个特性。 此外，基于指定的信号，跟踪脉冲序列与确定点处的成像脉冲序列同步。 跟踪脉冲序列然后与成像脉冲序列同时被应用，用于从包括至少一个跟踪线圈和跟踪源的介入装置获取对应的响应信号，该跟踪线被配置为在不同于成像谐振频率的跟踪谐振频率处产生响应信号。 基于从跟踪源接收到的响应信号和对应于成像梯度波形的特性来确定跟踪线圈在被摄体体内或体外的位置。
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7.发明授权公开(公告)号：US08198891B2
公开(公告)日：2012-06-12
申请号：US12484457
申请日：2009-06-15
IPC分类号： G01V3/00
CPC分类号： A61B5/055 , A61B5/0402 , G01R33/246 , G01R33/583
摘要： An apparatus, system, and method including a magnetic resonance imaging (MRI) apparatus includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images, and a computer. The computer is programmed to apply a first off-resonant radio frequency (RF) pulse at a first frequency different than the resonant frequency to a plurality of nuclei excited at a resonant frequency, acquire a first signal from the plurality of nuclei after application of the first off-resonant RF pulse, determine a phase shift from the first signal based on the first off-resonant RF pulse, determine a B1 field based on the phase shift, and store the B1 field on a computer readable storage medium.
摘要翻译： 包括磁共振成像（MRI）装置的装置，系统和方法包括具有围绕磁体的孔定位的多个梯度线圈的磁共振成像（MRI）系统，以及RF收发器系统和由RF 用于将RF信号发射到RF线圈组件以获取MR图像的脉冲模块，以及计算机。 计算机被编程为以不同于谐振频率的第一频率将第一非共振射频（RF）脉冲施加到以共振频率激励的多个核，在施加了所述多个核之后从第一信号获取第一信号 第一非共振RF脉冲，基于第一非共振RF脉冲从第一信号确定相移，基于相移确定B1场，并将B1场存储在计算机可读存储介质上。
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8.发明申请公开(公告)号：US20100315084A1
公开(公告)日：2010-12-16
申请号：US12484457
申请日：2009-06-15
IPC分类号： G01R33/44
CPC分类号： A61B5/055 , A61B5/0402 , G01R33/246 , G01R33/583
摘要： An apparatus, system, and method including a magnetic resonance imaging (MRI) apparatus includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images, and a computer. The computer is programmed to apply a first off-resonant radio frequency (RF) pulse at a first frequency different than the resonant frequency to a plurality of nuclei excited at a resonant frequency, acquire a first signal from the plurality of nuclei after application of the first off-resonant RF pulse, determine a phase shift from the first signal based on the first off-resonant RF pulse, determine a B1 field based on the phase shift, and store the B1 field on a computer readable storage medium.
摘要翻译： 包括磁共振成像（MRI）装置的装置，系统和方法包括具有围绕磁体的孔定位的多个梯度线圈的磁共振成像（MRI）系统，以及RF收发器系统和由RF 用于将RF信号发射到RF线圈组件以获取MR图像的脉冲模块，以及计算机。 计算机被编程为以不同于谐振频率的第一频率将第一非共振射频（RF）脉冲施加到以共振频率激励的多个核，在施加了所述多个核之后从第一信号获取第一信号 第一非共振RF脉冲，基于第一非共振RF脉冲从第一信号确定相移，基于相移确定B1场，并将B1场存储在计算机可读存储介质上。
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9.发明申请SYSTEM AND METHOD FOR CORRECTING FLOW VELOCITY MEASUREMENTS IN PHASE CONTRAST IMAGING USING MAGNETIC FIELD MONITORING 有权使用磁场监测校正相位对比成像中流动速度测量的系统和方法公开(公告)号：US20090256568A1
公开(公告)日：2009-10-15
申请号：US12101279
申请日：2008-04-11
申请人： Florian Wiesinger , Thomas K.F. Foo , Mika Vogel , Dirk Lange
发明人： Florian Wiesinger , Thomas K.F. Foo , Mika Vogel , Dirk Lange
IPC分类号： G01R33/48
CPC分类号： G01R33/56316 , G01R33/243 , G01R33/56518 , G01R33/56581
摘要： A system and method of phase contrast imaging includes a system control programmed to acquire a first set of data and a second set of data via the RF coil assembly during a scan and acquire a third set of data and a fourth set of data via the plurality of magnetic field monitoring devices during the scan. A first single data set from the first and third sets of data is formed, and a second single data set from the second and fourth sets of data is formed. The system control is also programmed to reconstruct a phase contrast image based on the first and second single data sets to correct for spatially-dependent background phase variations.
摘要翻译： 相位对比成像的系统和方法包括被编程以在扫描期间经由RF线圈组件获取第一组数据和第二组数据的系统控制，并经由多个数据采集第三组数据和第四组数据 的磁场监测装置。 形成来自第一和第三组数据的第一单个数据集，并且形成来自第二和第四组数据的第二单个数据集。 系统控制也被编程为基于第一和第二单个数据集重建相位对比图像，以校正空间相关的背景相位变化。
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公开(公告)号：US08217651B2
公开(公告)日：2012-07-10
申请号：US12638491
申请日：2009-12-15
IPC分类号： G01V3/00
CPC分类号： G01R33/3621 , G01R33/5602 , G01R33/5614 , G01R33/56366
摘要： An imaging system including an imaging apparatus having a plurality of coils, wherein an imaging target is at least partially disposed proximate the coils with at least one excitation source providing pulse sequences. A switch switchably connects the pulse sequences from the excitation source to the coils and switchably connecting to spatially encoded images from the coils during data acquisition. There is an amplified radiation damping feedback section providing amplified radiation damping feedback to the imaging target, wherein the amplified radiation damping feedback provides recovery of longitudinal magnetization subsequent to the data acquisition, and a receiver section for processing the spatially encoded images.
摘要翻译： 一种成像系统，包括具有多个线圈的成像设备，其中成像目标至少部分地布置在具有至少一个提供脉冲序列的激励源的线圈附近。 开关可切换地连接来自激励源的脉冲序列到线圈，并且在数据采集期间可切换地连接到来自线圈的空间编码图像。 存在放大的辐射阻尼反馈部分，其向成像目标提供放大的辐射阻尼反馈，其中放大的辐射阻尼反馈提供在数据采集之后的纵向磁化的恢复，以及用于处理空间编码的图像的接收器部分。
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