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公开(公告)号：US20080150528A1
公开(公告)日：2008-06-26
申请号：US11614798
申请日：2006-12-21
IPC分类号： G01V3/14
CPC分类号： G01R33/583 , G01R33/246 , G01R33/446 , G01R33/4824 , G01R33/4835 , G01R33/5607 , G01R33/561
摘要： For in vivo magnetic resonance imaging at high field (≧3 T) it is essential to consider the homogeneity of the active B1 field (B1+), particularly if surface coils are used for RF transmission. A new method is presented for highly rapid B1+ magnitude mapping. It combines the double angle method with a B1-insensitive magnetization-reset sequence such that the choice of repetition time (TR) is independent of T1 and with a multi-slice segmented (spiral) acquisition to achieve volumetric coverage with adequate spatial resolution in a few seconds.
摘要翻译： 对于在高场（> = 3T）下的体内磁共振成像，必须考虑活性B 1区域（B 1 + 1）的均匀性，特别是如果 表面线圈用于RF传输。 提出了一种用于高度快速的B＆lt; 1＆gt; +幅度映射的新方法。 它将双重角度方法与B 1敏感磁化复位序列相结合，使得重复时间（TR）的选择与T 1> 1不相关， 切片分段（螺旋）采集，在几秒钟内实现足够的空间分辨率的体积覆盖。
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公开(公告)号：US07446526B2
公开(公告)日：2008-11-04
申请号：US11614798
申请日：2006-12-21
IPC分类号： G01V3/00
CPC分类号： G01R33/583 , G01R33/246 , G01R33/446 , G01R33/4824 , G01R33/4835 , G01R33/5607 , G01R33/561
摘要： For in vivo magnetic resonance imaging at high field (≧3 T) it is essential to consider the homogeneity of the active B1 field (B1+), particularly if surface coils are used for RF transmission. A new method is presented for highly rapid B1+ magnitude mapping. It combines the double angle method with a B1-insensitive magnetization-reset sequence such that the choice of repetition time (TR) is independent of T1 and with a multi-slice segmented (spiral) acquisition to achieve volumetric coverage with adequate spatial resolution in a few seconds.
摘要翻译： 对于在高场（> = 3T）下的体内磁共振成像，必须考虑活性B 1区域（B 1 + 1）的均匀性，特别是如果 表面线圈用于RF传输。 提出了一种用于高度快速的B＆lt; 1＆gt; +幅度映射的新方法。 它将双重角度方法与B 1敏感磁化复位序列相结合，使得重复时间（TR）的选择与T 1> 1不相关， 切片分段（螺旋）采集，在几秒钟内实现足够的空间分辨率的体积覆盖。
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公开(公告)号：US08035381B2
公开(公告)日：2011-10-11
申请号：US12259990
申请日：2008-10-28
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/5607
摘要： A computer implemented method for designing a spectral-spatial pulse for exciting at least one passband and minimally exciting at least one stopband is provided. A uniform shaped spectral envelope is generated. For a plurality of kz≠0, kz dependent weights for a spectral envelope that approximate a kz=0 envelope and provides the at least one passband and the at least one stopband for each of the plurality of kz≠0 is generated.
摘要翻译： 提供了一种用于设计用于激励至少一个通带和最少激励至少一个阻带的频谱空间脉冲的计算机实现的方法。 产生均匀形状的光谱包络。 对于多个kz≠0，生成近似kz = 0包络并且为多个kz≠0中的每一个提供至少一个通带和至少一个阻带的频谱包络的kz相关权重。
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公开(公告)号：US20100102812A1
公开(公告)日：2010-04-29
申请号：US12259990
申请日：2008-10-28
IPC分类号： G01R33/483 , G01R33/54
CPC分类号： G01R33/4828 , G01R33/5607
摘要： A computer implemented method for designing a spectral-spatial pulse for exciting at least one passband and minimally exciting at least one stopband is provided. A uniform shaped spectral envelope is generated. For a plurality of kz≠0, kz dependent weights for a spectral envelope that approximate a kz=0 envelope and provides the at least one passband and the at least one stopband for each of the plurality of kz≠0 is generated.
摘要翻译： 提供了一种用于设计用于激励至少一个通带和最少激励至少一个阻带的频谱空间脉冲的计算机实现的方法。 产生均匀形状的光谱包络。 对于多个kz≠0，生成近似kz = 0包络并且为多个kz≠0中的每一个提供至少一个通带和至少一个阻带的频谱包络的kz相关权重。
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公开(公告)号：US07692423B2
公开(公告)日：2010-04-06
申请号：US11868617
申请日：2007-10-08
IPC分类号： G01V3/00
CPC分类号： G01R33/5676
摘要： A method for magnetic resonance imaging (MRI) is provided. A magnetic resonance excitation is provided. A magnetic field is read out through k-space using winders, wherein some of the winders overlap for a length of the winders. Readout data from overlapping lengths of winders is used to estimate motion. The readout may use a two dimensional discrete Fourier transform acquisition.
摘要翻译： 提供了一种用于磁共振成像（MRI）的方法。 提供磁共振激励。 使用络纱机通过k-空间读出磁场，其中一些络纱机在一定长度的络纱机上重叠。 来自重叠长度的络纱机的读出数据用于估计运动。 读出可以使用二维离散付里叶变换采集。
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6.发明授权Non-linear symmetric sweep spectral-spatial RF pulses for MR spectroscopy 有权用于MR光谱的非线性对称扫描频谱 - 空间RF脉冲公开(公告)号：US07042214B2
公开(公告)日：2006-05-09
申请号：US10823979
申请日：2004-04-13
IPC分类号： G01V3/00
CPC分类号： G01R33/446 , G01R33/4828
摘要： A method for designing non-linear phase 180° spectral-spatial radio frequency pulses that can be used for spectral editing in magnetic resonance spectroscopic imaging. A novel feature of the pulse is a symmetric sweep developed by the spectral profile from the outside edges of the spectral window towards the middle whereby coupled components are tipped simultaneously and over a short interval. Pulses have been designed for lactate editing at 1.5T and 3T. The spectral and spatial spin-echo profiles of the RF pulses can be measured experimentally and altered in an iterative manner. Spectral-spatial radio frequency (SSRF) pulses allow simultaneous selection in both frequency and spatial domains. These pulses are particularly important for clinical and research magnetic resonance spectroscopy (MRS) applications for suppression of large water and lipid resonances.
摘要翻译： 用于设计可用于磁共振光谱成像中的光谱编辑的非线性相位180°频谱空间射频脉冲的方法。 脉冲的新颖特征是通过从频谱窗口的外边缘向中间的光谱轮廓展开的对称扫描，由此耦合的部件同时并且在短的间隔内翻转。 脉冲设计用于1.5T和3T的乳酸盐编辑。 RF脉冲的频谱和空间自旋回波曲线可以通过实验测量并以迭代方式进行改变。 频谱空间射频（SSRF）脉冲允许在频域和空间域中同时进行选择。 这些脉冲对于抑制大量水和脂质共振的临床和研究磁共振波谱（MRS）应用尤为重要。
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公开(公告)号：US20090091321A1
公开(公告)日：2009-04-09
申请号：US11868617
申请日：2007-10-08
IPC分类号： G01V3/00
CPC分类号： G01R33/5676
摘要： A method for magnetic resonance imaging (MRI) is provided. A magnetic resonance excitation is provided. A magnetic field is read out through k-space using winders, wherein some of the winders overlap for a length of the winders. Readout data from overlapping lengths of winders is used to estimate motion. The readout may use a two dimensional discrete Fourier transform acquisition.
摘要翻译： 提供了一种用于磁共振成像（MRI）的方法。 提供磁共振激励。 使用络纱机通过k-空间读出磁场，其中一些络纱机与卷绕机的长度重叠。 来自重叠长度的络纱机的读出数据用于估计运动。 读出可以使用二维离散付里叶变换采集。
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公开(公告)号：US06965234B1
公开(公告)日：2005-11-15
申请号：US10960212
申请日：2004-10-06
申请人： Charles H. Cunningham , Juan M. Santos , John M. Pauly , Graham Arnold Wright , Jeffrey Alan Stainsby , John Andrew Derbyshire
发明人： Charles H. Cunningham , Juan M. Santos , John M. Pauly , Graham Arnold Wright , Jeffrey Alan Stainsby , John Andrew Derbyshire
IPC分类号： G01R33/46 , G01R33/483 , G01V3/00
CPC分类号： G01R33/4838 , G01R33/4616 , G01R33/4833
摘要： A RF Excitation pulse for MRI applications has built-in saturation sidebands, thereby reducing the time for an excitation sequence. The pulse is created using the Shinnar-Le Roux (SLR) transform and designing beta-polynomials for a desired image slice excitation and for saturation of RF excitation such as by de-phasing in regions adjacent to the desired image slice. The beta-polynomials are combined and an inverse SLR transform creates the RF pulse from the combined beta-polynomial.
摘要翻译： 用于MRI应用的RF激励脉冲具有内置饱和边带，从而减少激励序列的时间。 使用Shinnar-Le Roux（SLR）变换创建脉冲，并为期望的图像切片激励设计β多项式，并且通过例如通过在与期望的图像切片相邻的区域中去相位来设置RF激发的饱和度。 β多项式被组合，逆SLR变换从组合的β多项式创建RF脉冲。
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9.发明申请公开(公告)号：US20190128976A1
公开(公告)日：2019-05-02
申请号：US15797639
申请日：2017-10-30
IPC分类号： G01R33/24
CPC分类号： G01R33/24 , G01R33/445 , G01R33/4835 , G01R33/5617
摘要： The present disclosure provides a system for and a method of obtaining a magnetic resonance image by performing magnetic resonance imaging (MRI) at multiple slices simultaneously. The method comprises generating a multiband pulse sequence for spin-echo imaging, the pulse sequence comprising a multiband excitation pulse and at least one multiband refocusing pulse, wherein the multiband excitation pulse simultaneously excites multiple bands, wherein the at least one multiband refocusing pulse simultaneously refocuses the multiple bands, and wherein the phases of the bands excited by the multiband excitation pulse and the phases of the bands refocused by the at least one multiband refocusing pulse are set according to a single row of an orthogonal encoding matrix. The multiband excitation pulse and the at least one multiband refocusing pulse collectively form a multiband pulse pair.
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10.发明申请Interventional Instrument Tracking Device Imageable with Magnetic Resonance Imaging and Method for Use Thereof 有权介入式仪器跟踪装置，可以用磁共振成像法形成，其使用方法公开(公告)号：US20120310080A1
公开(公告)日：2012-12-06
申请号：US13518160
申请日：2010-12-22
IPC分类号： A61M25/095 , A61B5/055
CPC分类号： A61B5/055 , A61B5/062 , A61B34/20 , A61B2034/2046 , A61B2090/3954 , A61B2090/3958 , A61M25/0127 , G01R33/287
摘要： A tracking device configured to be coupled to an interventional instrument and tracked by a magnetic resonance imaging system is provided. The tracking device includes, for example, paramagnetic and diamagnetic components that form first and second tracking members. When the tracking device is adjusted into a first arrangement, the tracking device will produce a local magnetic field in the presence of the magnetic field of an MRI system that is measurable by the MRI system. However, when the tracking device is adjusted into a second arrangement, the local magnetic field produced by the tracking device is reduced relative to the first arrangement, wherein the reduced local magnetic field produces substantially no magnetic field disturbances detectable by the MRI system. Images may be acquired of a patient in which the tracking device has been introduced and, using a numerical fitting method, an accurate location of the tracking device can be determined.
摘要翻译： 提供了被配置为耦合到介入仪器并由磁共振成像系统跟踪的跟踪装置。 跟踪装置包括例如形成第一和第二跟踪构件的顺磁性和抗磁性成分。 当跟踪装置被调整为第一布置时，跟踪装置将在可由MRI系统测量的MRI系统的磁场的存在下产生局部磁场。 然而，当跟踪装置被调整为第二布置时，由跟踪装置产生的局部磁场相对于第一布置减小，其中减小的局部磁场基本上不产生MRI系统可检测的磁场干扰。 可以获取其中已经引入了跟踪装置的患者的图像，并且可以使用数值拟合方法来确定跟踪装置的精确位置。
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