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公开(公告)号：US09036884B2
公开(公告)日：2015-05-19
申请号：US13393232
申请日：2010-08-05
申请人： Paul R. Harvey , Thomas H. Rozijn , Gerrit H. Ijperen , Willem M. Prins , Wilhelmus R. M. Mens , Franciscus J. M. Benschop
发明人： Paul R. Harvey , Thomas H. Rozijn , Gerrit H. Ijperen , Willem M. Prins , Wilhelmus R. M. Mens , Franciscus J. M. Benschop
IPC分类号： G06K9/00 , G01R33/565
CPC分类号： G01R33/5659
摘要： A magnetic resonance system includes a magnetic resonance scanner having a multi-channel transmit coil or coil system and a magnetic resonance receive element; and a digital processor configured to perform an imaging process. The image process includes shimming the multi-channel transmit coil or coil system, acquiring a coil sensitivity map for the magnetic resonance receive element using the multi-channel transmit coil or coil system, acquiring a magnetic resonance image using the magnetic resonance receive element and the shimmed multi-channel transmit coil or coil system, and performing an intensity level correction on the acquired magnetic resonance image using the coil sensitivity map to generate a corrected magnetic resonance image.
摘要翻译： 磁共振系统包括具有多通道发射线圈或线圈系统和磁共振接收元件的磁共振扫描器; 以及被配置为执行成像处理的数字处理器。 图像处理包括对多通道发射线圈或线圈系统进行匀场，使用多通道发射线圈或线圈系统获取用于磁共振接收元件的线圈灵敏度图，使用磁共振接收元件获取磁共振图像，并且 并且使用线圈灵敏度图对获取的磁共振图像执行强度电平校正，以产生校正的磁共振图像。
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公开(公告)号：US20120163692A1
公开(公告)日：2012-06-28
申请号：US13393232
申请日：2010-08-05
申请人： Paul R. Harvey , Thomas H. Rozijn , Gerrit H. Ijperen , Willem M. Prins , Wilhelmus R. M. Mens , Franciscus J. M. Benschop
发明人： Paul R. Harvey , Thomas H. Rozijn , Gerrit H. Ijperen , Willem M. Prins , Wilhelmus R. M. Mens , Franciscus J. M. Benschop
IPC分类号： G06K9/00
CPC分类号： G01R33/5659
摘要： A magnetic resonance system comprises: a magnetic resonance scanner including a multi-channel transmit coil or coil system and a magnetic resonance receive element; and a digital processor configured to perform an imaging process including shimming the multi-channel transmit coil or coil system, acquiring a coil sensitivity map for the magnetic resonance receive element using the multi-channel transmit coil or coil system, acquiring a magnetic resonance image using the magnetic resonance receive element and the shimmed multi-channel transmit coil or coil system, and performing an intensity level correction on the acquired magnetic resonance image using the coil sensitivity map to generate a corrected magnetic resonance image.
摘要翻译： 磁共振系统包括：包括多通道发射线圈或线圈系统和磁共振接收元件的磁共振扫描器; 以及数字处理器，被配置为执行包括对多通道发射线圈或线圈系统进行匀场的成像处理，使用多通道发射线圈或线圈系统获取用于磁共振接收元件的线圈灵敏度图，使用 所述磁共振接收元件和所述散光多通道发射线圈或线圈系统，并且使用所述线圈灵敏度映射对获取的磁共振图像执行强度电平校正，以产生校正的磁共振图像。
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3.发明申请公开(公告)号：US20120161766A1
公开(公告)日：2012-06-28
申请号：US13393234
申请日：2010-08-05
IPC分类号： G01R33/48
CPC分类号： G01R33/583 , G01R33/5612 , G01R33/5659
摘要： A magnetic resonance method comprising: loading a subject into a magnetic resonance scanner; with the subject loaded into the magnetic resonance scanner, acquiring B1 maps (72) for a plurality of radio frequency transmit channels of the magnetic resonance scanner; shimming the plurality of radio frequency transmit channels and setting a radio frequency transmit power for the shimmed plurality of radio frequency transmit channels using the acquired B 1 maps to generate optimized amplitude and phase parameters (98) for the plurality of radio frequency transmit channels; acquiring magnetic resonance imaging data of the subject loaded into the magnetic resonance scanner including exciting magnetic resonance by operating the plurality of radio frequency transmit channels using the optimized amplitude and phase parameters; generating a reconstructed image from the acquired magnetic resonance imaging data; and displaying the reconstructed image.
摘要翻译： 一种磁共振方法，包括：将对象加载到磁共振扫描器中; 将被摄体加载到磁共振扫描器中，获取磁共振扫描器的多个射频发射通道的B1图（72）; 对所述多个射频发射信道进行匀场，并使用所获取的B 1映射设置所述多个无线频率发射信道的射频发射功率，以产生用于所述多个射频发射信道的优化的幅度和相位参数（98）; 使用优化的幅度和相位参数，通过操作多个射频发射信道来获取加载到磁共振扫描仪中的被摄体的磁共振成像数据，其包括激励磁共振; 从所获取的磁共振成像数据生成重建图像; 并显示重建图像。
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公开(公告)号：US07852084B2
公开(公告)日：2010-12-14
申请号：US12297652
申请日：2007-04-03
IPC分类号： G01V3/00
CPC分类号： G01R33/5659 , G01R33/246 , G01R33/3415
摘要： In a magnetic resonance scanner, a main magnet (20, 22) generates a static magnetic field at least in an examination region. A magnetic field gradient system (30, 54) selectively superimposes magnetic field gradients on the static magnetic field at least in the examination region. A magnetic resonance excitation system (36, 36′) includes at least one radio frequency coil (30, 301, 302, 303) arranged to inject radio frequency B1 fields into the examination region and at least two radio frequency amplifiers (38, 40, 40′) coupled with different input ports of the at least one radio frequency coil. A controller (66, 70) controls the magnetic resonance excitation system to produce a time varying spatial B1 field distribution in a subject (16) in the examination region that time integrates to define a spatial tip angle distribution in the subject having reduced spatial non uniformity.
摘要翻译： 在磁共振扫描器中，主磁体（20,22）至少在检查区域中产生静磁场。 磁场梯度系统（30,54）至少在检查区域中选择性地将磁场梯度叠加在静磁场上。 磁共振激励系统（36,36'）包括至少一个射频线圈（30,301,302,303），其布置成将射频B1场注入检查区域，并且至少两个射频放大器（38,40,303） 40'）耦合到所述至少一个射频线圈的不同输入端口。 控制器（66,70）控制磁共振激励系统以在检查区域中的对象（16）中产生时变空间B1场分布，该时间积分以限定被摄体中的具有降低的空间非均匀性的空间尖角分布 。
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公开(公告)号：US20090102483A1
公开(公告)日：2009-04-23
申请号：US12297652
申请日：2007-04-03
IPC分类号： G01R33/32
CPC分类号： G01R33/5659 , G01R33/246 , G01R33/3415
摘要： In a magnetic resonance scanner, a main magnet (20, 22) generates a static magnetic field at least in an examination region. A magnetic field gradient system (30, 54) selectively superimposes magnetic field gradients on the static magnetic field at least in the examination region. A magnetic resonance excitation system (36, 36′) includes at least one radio frequency coil (30, 301, 302, 303) arranged to inject radio frequency B1 fields into the examination region and at least two radio frequency amplifiers (38, 40, 40′) coupled with different input ports of the at least one radio frequency coil. A controller (66, 70) controls the magnetic resonance excitation system to produce a time varying spatial B1 field distribution in a subject (16) in the examination region that time integrates to define a spatial tip angle distribution in the subject having reduced spatial non uniformity.
摘要翻译： 在磁共振扫描器中，主磁体（20,22）至少在检查区域中产生静磁场。 磁场梯度系统（30,54）至少在检查区域中选择性地将磁场梯度叠加在静磁场上。 磁共振激励系统（36,36'）包括至少一个射频线圈（30,301,302,303），其布置成将射频B1场注入检查区域，并且至少两个射频放大器（38,40,303） 40'）耦合到所述至少一个射频线圈的不同输入端口。 控制器（66,70）控制磁共振激励系统以在检查区域中的对象（16）中产生时变空间B1场分布，该时间积分以限定被摄体中的具有降低的空间非均匀性的空间尖角分布 。
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6.发明申请公开(公告)号：US20080265890A1
公开(公告)日：2008-10-30
申请号：US12091303
申请日：2006-10-03
IPC分类号： G01R33/36
CPC分类号： G01R33/3635
摘要： A medical imaging system (2) excites multiple nuclei through a single RF amplifier (24). The medical imaging system (2) includes a magnet (10) that generates a main magnetic field (Bo) in an examination region. A gradient coil (14) superimposes magnetic field gradients (G) on the main magnetic field Bo. At least one transmitter (28) generates multi-nuclei excitation pulses associated with at least two different isotopes and two different frequency spectra. The single amplifier (24) sends the multi-nuclei excitation pulses to a RF coil (18, 20) for application to the examination region.
摘要翻译： 医学成像系统（2）通过单个RF放大器（24）激发多个核。 医疗成像系统（2）包括在检查区域中产生主磁场（Bo）的磁体（10）。 梯度线圈（14）将磁场梯度（G）叠加在主磁场Bo上。 至少一个发射器（28）产生与至少两个不同同位素和两个不同频谱相关联的多核激励脉冲。 单个放大器（24）将多核激励脉冲发送到RF线圈（18,20）以供应用于检查区域。
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公开(公告)号：US06275038B1
公开(公告)日：2001-08-14
申请号：US09265456
申请日：1999-03-10
申请人： Paul R. Harvey
发明人： Paul R. Harvey
IPC分类号： G01V300
CPC分类号： G01R33/56563 , G01R33/5616
摘要： A method is provided for evaluating an inhomogeneity in a magnetic polarizing field used to acquire an MRI image of a slice of a subject, at a point in the slice, the method comprising: acquiring data in a k-space for first and second k-space scans of the subject with a single application of a first MRI pulse sequence, wherein data acquisition for the second k-space scan is delayed with respect to data acquisition for the first k-space scan by a time delay; generating first and second spatial images from the first and second k-space scans; determining a phase difference between values of the first and second spatial images at the point; and evaluating the inhomogeneity at the point using the phase difference and the time delay.
摘要翻译： 提供了一种用于评估用于获取受试者的切片的MRI图像的磁极化场中的不均匀性的方法，所述方法包括：在k空间中获取第一和第二k- 利用单次应用第一MRI脉冲序列对被摄体进行空间扫描，其中第二k空间扫描的数据采集相对于第一k空间扫描的数据采集被延迟延迟; 从第一和第二k空间扫描生成第一和第二空间图像; 确定该点处的第一和第二空间图像的值之间的相位差; 并使用相位差和时间延迟来评估点处的不均匀性。
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公开(公告)号：US06275037B1
公开(公告)日：2001-08-14
申请号：US09152198
申请日：1998-09-14
申请人： Paul R. Harvey , Haim Rotem
发明人： Paul R. Harvey , Haim Rotem
IPC分类号： G01R3320
CPC分类号： G01R33/561 , G01R33/5619
摘要： A method is provided for removing discontinuities between the data of a first and second data set acquired in a k-space for a same MRI image of a subject, where the data for each of the data sets is acquired at k-coordinate points in adjacent regions of the k-space, using different MRI imaging techniques or operating conditions.
摘要翻译： 提供了一种用于消除在对象的相同MRI图像中在k空间中获取的第一和第二数据集的数据之间的不连续性的方法，其中在相邻的k坐标点处获取每个数据集的数据 区域的k空间，使用不同的MRI成像技术或操作条件。
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9.发明授权Modular whole-body gradient coil comprising first and second gradient coils having linear gradients in the same direction 失效模块化全身梯度线圈包括具有相同方向线性梯度的第一和第二梯度线圈
公开(公告)号：US5736858A
公开(公告)日：1998-04-07
申请号：US738579
申请日：1996-10-29
申请人： Ehud Katznelson , Paul R. Harvey
发明人： Ehud Katznelson , Paul R. Harvey
IPC分类号： A61B5/055 , G01R33/385 , G01R33/421 , G01V3/00 , G01V3/14
CPC分类号： G01R33/385 , G01R33/4215
摘要： An MRI system incorporating modular whole body gradient coils that can selectively be used for conventional imaging or for ultra-fast imaging. A central modular coil is used alone for the ultra-fast imaging or used in combination with a modular flanking coil for conventional imaging.
摘要翻译： 一种包含模块化全身梯度线圈的MRI系统，可以选择性地用于常规成像或超快速成像。 中央模块化线圈单独用于超快速成像，或与用于常规成像的模块化侧翼线圈组合使用。
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10.发明申请MR INVOLVING HIGH SPEED COIL MODE SWITCHING BETWEEN I-CHANNEL LINEAR, Q-CHANNEL LINEAR, QUADRATURE AND ANTI-QUADRATURE MODES 有权涉及I通道线性，Q通道线性，平坦度和反平衡模式之间的高速线圈切换公开(公告)号：US20090201019A1
公开(公告)日：2009-08-13
申请号：US12297658
申请日：2007-04-03
CPC分类号： G01R33/34046 , G01R33/246 , G01R33/3664 , G01R33/3678 , G01R33/5659
摘要： Hybrid circuitry (40, 40′, 40″) for operatively coupling a radio frequency drive signal (70) with a quadrature coil (30) is configurable in one of at least two coil modes of a group consisting of: (i) a linear I channel mode in which an I channel input port (42) is driven without driving a Q channel input port (44); (ii) a linear Q channel mode in which the Q channel input port is driven without driving the I channel input port; (iii) a quadrature mode in which both the I and Q channel input ports are driven with a selected positive phase difference; and (iv) an anti quadrature mode in which both the I and Q channel input ports are driven with a selected negative phase difference. A temporal sequence of the at least two coil modes may be determined and employed to compensate for B inhomogeneity.
摘要翻译： 用于将射频驱动信号（70）与正交线圈（30）可操作地耦合的混合电路（40,40'，40“）可配置成以下组中的至少两个线圈模式之一：（i） 线性I通道模式，其中驱动I通道输入端口（42）而不驱动Q通道输入端口（44）; （ii）在不驱动I通道输入端口的情况下驱动Q通道输入端口的线性Q通道模式; （iii）正交模式，其中I和Q通道输入端口都以选择的正相位差驱动; 以及（iv）反正交模式，其中I和Q通道输入端口都以选定的负相位差驱动。 可以确定并采用至少两个线圈模式的时间序列来补偿B不均匀性。
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