公开(公告)号：US07023209B2

公开(公告)日：2006-04-04

申请号：US09974184

申请日：2001-10-09

申请人： Xiaoliang Zhang ,  Kamil Ugurbil ,  Wei Chen

发明人： Xiaoliang Zhang ,  Kamil Ugurbil ,  Wei Chen

IPC分类号： G01V3/00

CPC分类号： H01Q17/00 ,  G01R33/34007 ,  G01R33/345 ,  Y10T29/4902 ,  Y10T29/49073

摘要： Apparatus and method for MRI imaging using a coil constructed of microstrip transmission line (MTL coil) are disclosed. In one method, a target is positioned to be imaged within the field of a main magnetic field of a magnet resonance imaging (MRI) system, a MTL coil is positioned proximate the target, and a MRI image is obtained using the main magnet and the MTL coil. In another embodiment, the MRI coil is used for spectroscopy. MRI imaging and spectroscopy coils are formed using microstrip transmission line. These MTL coils have the advantageous property of good performance while occupying a relatively small space, thus allowing MTL coils to be used inside restricted areas more easily than some other prior art coils. In addition, the MTL coils are relatively simple to construct of inexpensive components and thus relatively inexpensive compared to other designs. Further, the MTL coils of the present invention can be readily formed in a wide variety of coil configurations, and used in a wide variety of ways. Further, while the MTL coils of the present invention work well at high field strengths and frequencies, they also work at low frequencies and in low field strengths as well.

公开(公告)号：US20060006865A1

公开(公告)日：2006-01-12

申请号：US11224436

申请日：2005-09-12

申请人： Xiaoliang Zhang ,  Kamil Ugurbil ,  Wei Chen

发明人： Xiaoliang Zhang ,  Kamil Ugurbil ,  Wei Chen

IPC分类号： G01V3/00

CPC分类号： H01Q17/00 ,  G01R33/34007 ,  G01R33/345 ,  Y10T29/4902 ,  Y10T29/49073

摘要： Apparatus and method for MRI imaging using a coil constructed of microstrip transmission line (MTL coil) are disclosed. In one method, a target is positioned to be imaged within the field of a main magnetic field of a magnet resonance imaging (MRI) system, a MTL coil is positioned proximate the target, and a MRI image is obtained using the main magnet and the MTL coil. In another embodiment, the MRI coil is used for spectroscopy. MRI imaging and spectroscopy coils are formed using microstrip transmission line. These MTL coils have the advantageous property of good performance while occupying a relatively small space, thus allowing MTL coils to be used inside restricted areas more easily than some other prior art coils. In addition, the MTL coils are relatively simple to construct of inexpensive components and thus relatively inexpensive compared to other designs. Further, the MTL coils of the present invention can be readily formed in a wide variety of coil configurations, and used in a wide variety of ways. Further, while the MTL coils of the present invention work well at high field strengths and frequencies, they also work at low frequencies and in low field strengths as well.

公开(公告)号：US20060277749A1

公开(公告)日：2006-12-14

申请号：US11436197

申请日：2006-05-17

申请人： Xiaoliang Zhang ,  Kamil Ugurbil ,  Wei Chen

发明人： Xiaoliang Zhang ,  Kamil Ugurbil ,  Wei Chen

IPC分类号： H01Q17/00 ,  G01V3/00 ,  H01F7/06

CPC分类号： H01Q17/00 ,  G01R33/34007 ,  G01R33/345 ,  Y10T29/4902 ,  Y10T29/49073

摘要： Apparatus and method for MRI imaging using a coil constructed of microstrip transmission line (MTL coil) are disclosed. In one method, a target is positioned to be imaged within the field of a main magnetic field of a magnet resonance imaging (MRI) system, a MTL coil is positioned proximate the target, and a MRI image is obtained using the main magnet and the MTL coil. In another embodiment, the MRI coil is used for spectroscopy. MRI imaging and spectroscopy coils are formed using microstrip transmission line. These MTL coils have the advantageous property of good performance while occupying a relatively small space, thus allowing MTL coils to be used inside restricted areas more easily than some other prior art coils. In addition, the MTL coils are relatively simple to construct of inexpensive components and thus relatively inexpensive compared to other designs. Further, the MTL coils of the present invention can be readily formed in a wide variety of coil configurations, and used in a wide variety of ways. Further, while the MTL coils of the present invention work well at high field strengths and frequencies, they also work at low frequencies and in low field strengths as well.

公开(公告)号：US06400150B1

公开(公告)日：2002-06-04

申请号：US09824511

申请日：2001-04-02

申请人： Haiying Liu ,  Wei Chen ,  Kamil Ugurbil

发明人： Haiying Liu ,  Wei Chen ,  Kamil Ugurbil

IPC分类号： G01V300

CPC分类号： G01R33/4625

摘要： NMR spectroscopy data recovery methods and apparatus for improving the quality of an NMR spectrum are disclosed. The NMR spectrum is improved by acquiring more than the half spin-echo data signal and using an iterative numerical method to reconstruct the missing data points of the corresponding full symmetrical spin-echo data signal. The method includes filtering the initial data signal to extract a low-resolution phase term. The low-resolution phase term is used to form a phase-constrained initial data signal, which is Fourier-transformed to obtain a reconstructed data signal. The reconstructed data signal is modified to include the original spin-echo signal data. The formation of the reconstructed spin-echo data signal and subsequent modification is iterated until convergence is obtained. The reconstructed data signal is then Fourier-transformed to form a reconstructed NMR spectrum.

摘要翻译： 公开了用于提高NMR光谱质量的NMR光谱数据回收方法和装置。 通过获取多于半自旋回波数据信号并使用迭代数值方法来重建相应的全对称自旋回波数据信号的丢失数据点，从而改进NMR谱。 该方法包括对初始数据信号进行滤波以提取低分辨率相位项。 低分辨率相位项用于形成相位约束的初始数据信号，其被傅里叶变换以获得重建的数据信号。 重建的数据信号被修改为包括原始自旋回波信号数据。 重建自旋回波数据信号的形成和随后的修改，直到获得收敛。 然后对重建的数据信号进行傅里叶变换以形成重建的NMR谱。

公开(公告)号：US06639405B2

公开(公告)日：2003-10-28

申请号：US10067180

申请日：2002-02-04

申请人： Haiying Liu ,  Wei Chen ,  Kamil Ugurbil

发明人： Haiying Liu ,  Wei Chen ,  Kamil Ugurbil

IPC分类号： G01V300

CPC分类号： G01R33/4625

摘要： NMR spectroscopy data recovery methods and apparatus for improving the quality of an NMR spectrum are disclosed. The NMR spectrum is improved by acquiring more than the half spin-echo data signal and using an iterative numerical method to reconstruct the missing data points of the corresponding full symmetrical spin-echo data signal. The method includes filtering the initial data signal to extract a low-resolution phase term. The low-resolution phase term is used to form a phase-constrained initial data signal, which is Fourier-transformed to obtain a reconstructed data signal. The reconstructed data signal is modified to include the original spin-echo signal data. The formation of the reconstructed spin-echo data signal and subsequent modification is iterated until convergence is obtained. The reconstructed data signal is then Fourier-transformed to form a reconstructed NMR spectrum.

公开(公告)号：US09671481B2

公开(公告)日：2017-06-06

申请号：US13995875

申请日：2011-12-20

申请人： Kamil Ugurbil

发明人： Kamil Ugurbil

IPC分类号： G01R33/54 ,  G01R33/483 ,  G01R33/3415 ,  G01R33/561

CPC分类号： G01R33/543 ,  G01R33/3415 ,  G01R33/4835 ,  G01R33/5612

摘要： A method is provided for substantially simultaneously manipulating spins in a plurality of slice locations using a magnetic resonance imaging (“MRI”) system that includes a radio frequency (“RF”) coil array composed of a plurality of RF coil elements, and in which power deposition, which may be measured as specific absorption rate (“SAR”), is reduce A plurality of slice locations to be substantially simultaneously manipulated with the MRI system are selected, and an RF transmission map (B1+map) is provided for each of the plurality of RF coil elements. A subset of slice locations to be manipulated by each of the RF coil elements is then selected using the provided RF transmission maps. Using the selected subsets of slice locations, an RF pulse to be transmitted by each of the RF coil elements is designed. The designed RF pulses are then substantially simultaneously transmitted by the MRI system to substantially simultaneously manipulate spins in each o the plurality of slice locations.

公开(公告)号：US20130342206A1

公开(公告)日：2013-12-26

申请号：US13995869

申请日：2011-12-20

申请人： Kamil Ugurbil

发明人： Kamil Ugurbil

IPC分类号： G01R33/561

CPC分类号： G01R33/561 ,  G01R33/4835 ,  G01R33/5602

摘要： A method for acquiring image data from a plurality of slice locations in a subject with a magnetic resonance imaging (MRI) system is provided. The method includes directing the MRI system to perform a pulse sequence that includes performing a contrast preparation module configured to generate contrast-encoded longitudinal magnetization and an image encoding module configured to acquire image data from multiple slice locations substantially simultaneously. The contrast preparation module generally includes tipping longitudinal magnetization into the transverse plane to produce transverse magnetization, generating contrast-prepared transverse magnetization by establishing an image contrast in the transverse magnetization, and tipping the contrast-prepared magnetization back along the longitudinal axis to produce the contrast-encoded longitudinal magnetization.

摘要翻译： 提供了一种利用磁共振成像（MRI）系统从受试者的多个切片位置获取图像数据的方法。 该方法包括引导MRI系统执行脉冲序列，该脉冲序列包括执行配置成生成对比度编码的纵向磁化的对比度准备模块和被配置为基本上同时从多个切片位置获取图像数据的图像编码模块。 造影剂制备模块通常包括将纵向磁化倾斜到横向平面中以产生横向磁化，通过在横向磁化中建立图像对比度产生对比度制备的横向磁化，以及沿着纵轴倾斜对比度制备的磁化以产生对比度 - 编码纵向磁化。

公开(公告)号：US20060255806A1

公开(公告)日：2006-11-16

申请号：US11415366

申请日：2006-05-01

申请人： J. Vaughan ,  Gregor Adriany ,  Kamil Ugurbil

发明人： J. Vaughan ,  Gregor Adriany ,  Kamil Ugurbil

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/3453

摘要： An apparatus comprises a radio frequency magnetic field unit to generate a desired magnetic field. In one embodiment, the radio frequency magnetic field unit includes a first aperture that is substantially unobstructed and a second aperture contiguous to the first aperture. In an alternative embodiment, the radio frequency magnetic field unit includes a first side aperture, a second side aperture and one or more end apertures. In one embodiment of a method, a current element is removed from a radio frequency magnetic field unit to form a magnetic field unit having an aperture. In an alternative embodiment, two current elements located opposite from one another in a radio frequency magnetic field unit are removed to form a magnetic filed unit having a first side aperture and a second side aperture.

摘要翻译： 一种装置包括用于产生期望磁场的射频磁场单元。 在一个实施例中，射频磁场单元包括基本无障碍的第一孔和与第一孔邻接的第二孔。 在替代实施例中，射频磁场单元包括第一侧孔，第二侧孔和一个或多个端孔。 在一种方法的一个实施例中，从射频磁场单元移除电流元件以形成具有孔径的磁场单元。 在替代实施例中，移除在射频磁场单元中彼此相对定位的两个电流元件，以形成具有第一侧孔和第二侧孔的磁场单元。

公开(公告)号：US20050116715A1

公开(公告)日：2005-06-02

申请号：US10957870

申请日：2004-10-04

申请人： J. Vaughan ,  Gregor Adriany ,  Kamil Ugurbil ,  John Strupp ,  Peter Andersen

发明人： J. Vaughan ,  Gregor Adriany ,  Kamil Ugurbil ,  John Strupp ,  Peter Andersen

IPC分类号： G01R33/32 ,  G01R33/34 ,  G01R33/3415 ,  G01V3/00 ,  G21K20060101

CPC分类号： G01R33/34046 ,  G01R33/246 ,  G01R33/3415

摘要： An excitation and detection circuit having individually controllable elements for use with a multi-element radio frequency coil. Characteristics of the driving signal, including, for example, the phase, amplitude, frequency and timing, from each element of the circuit is separately controllable using small signals. Negative feedback for the driving signal associated with each coil element is derived from a receiver coupled to that coil element.

摘要翻译： 激励和检测电路具有用于与多元件射频线圈一起使用的独立可控元件。 来自电路的每个元件的驱动信号的特性，包括例如相位，幅度，频率和定时的特性可以使用小信号单独控制。 与每个线圈元件相关联的驱动信号的负反馈从耦合到该线圈元件的接收器导出。

公开(公告)号：US08941381B2

公开(公告)日：2015-01-27

申请号：US13118179

申请日：2011-05-27

申请人： David Feinberg ,  Kamil Ugurbil

发明人： David Feinberg ,  Kamil Ugurbil

IPC分类号： G01R33/561 ,  G01R33/483

CPC分类号： G01R33/4835 ,  G01R33/561 ,  G01R33/5611 ,  G01R33/5615

摘要： Disclosed are methods and systems for carrying out super-multiplexed magnetic resonance imaging that entwines techniques previously used individually and independently of each other in Simultaneous Echo (or Imaging) Refocusing (SER or SIR) and Multi-Band (MB) excitation, in a single pulse sequence that provides a multiplication rather than summation of desirable effects while suppressing undesirable effects of each of the techniques that previously were used independently.

摘要翻译： 公开了用于执行超多重磁共振成像的方法和系统，其在单次同时回波（或成像）重聚焦（SER或SIR）和多频带（MB）激励中单独地并且彼此独立地相互交织， 脉冲序列提供乘法而不是期望效应的求和，同时抑制先前独立使用的每种技术的不期望的影响。