公开(公告)号：US20080012564A1

公开(公告)日：2008-01-17

申请号：US11484091

申请日：2006-07-11

Applicant: Fa-Hsuan Lin

Inventor： Fa-Hsuan Lin

IPC: G01V3/00

CPC classification number: G01R33/5611 ,  G01R33/4806 ,  G01R33/4824 ,  G01R33/5608 ,  G01R33/56308

Abstract: An fMRI scan is performed using a multi-element head coil and multi-channel receiver to acquire time course image data. One imaging gradient is eliminated from the pulse sequence used to acquire the time course image data enabling images to be acquired at a very high frame rate. The multi-channel NMR data is combined and reconstructed into a series of image frames using an imaging inversion operator.

Abstract translation: 使用多元素头线圈和多通道接收器执行fMRI扫描以获取时间过程图像数据。 从用于获取时间图像数据的脉冲序列中消除一个成像梯度，使得以非常高的帧速率获取图像。 使用成像反演算子将多通道NMR数据组合并重构成一系列图像帧。

公开(公告)号：US08334696B2

公开(公告)日：2012-12-18

申请号：US12753555

申请日：2010-04-02

Applicant: Fa-Hsuan Lin

Inventor： Fa-Hsuan Lin

IPC: G01V3/00

CPC classification number: G01R33/5611

Abstract: A method for producing an image of a subject with a magnetic resonance imaging (MRI) system is provided. In particular, spatial encoding of signals received from the subject is performed by spatial encoding magnetic fields (SEMs) produced by driving a parallel array of local gradient coils with current weightings that define a mode of the coil array. A set of globally orthogonal modes are determined using a singular value decomposition and two modes that produce SEMs with desired magnetic field variance characteristics are selected for spatial encoding. The spatially encoding signals are received by a parallel array of radio frequency receiver coil elements in order to resolve ambiguities in spatial encoding caused by the SEMs. Images are subsequently reconstructed using, for example, an iterative time domain reconstruction method.

Abstract translation: 提供了一种用于产生具有磁共振成像（MRI）系统的对象的图像的方法。 特别地，通过对通过限定线圈阵列的模式的当前加权驱动局部梯度线圈的并行阵列产生的磁场（SEM）来执行从对象接收的信号的空间编码。 使用奇异值分解确定一组全局正交模式，并选择产生具有期望磁场方差特征的SEM的两种模式进行空间编码。 空间编码信号由射频接收器线圈元件的并联阵列接收，以便解决由SEM引起的空间编码中的歧义。 随后使用例如迭代时域重建方法重建图像。

公开(公告)号：US07683620B2

公开(公告)日：2010-03-23

申请号：US12114339

申请日：2008-05-02

Applicant: Fa-Hsuan Lin

Inventor： Fa-Hsuan Lin

IPC: G01V3/00

CPC classification number: G01R33/485 ,  G01R33/4806 ,  G01R33/482 ,  G01R33/4824 ,  G01R33/4838 ,  G01R33/5607 ,  G01R33/561 ,  G01R33/5616 ,  G01R33/565 ,  G01R33/56545

Abstract: A method for suppressing the noise component of a measured magnetic resonance (MR) signal is disclosed. In particular, a signal-space projection operator is produced and employed to suppress the noise component from acquired MR signals that is uncorrelated with the spatial pattern of a desired NMR signal. In one embodiment, an fMRI scan is performed to acquire time course image data. The NMR data is filtered with a signal-space projection operator and reconstructed into a series of image frames. In another embodiment, the signal-space projection operator is employed to suppress lipid signal in MRS image data.

Abstract translation: 公开了一种用于抑制测量的磁共振（MR）信号的噪声分量的方法。 特别地，产生信号空间投影算子并且用于抑制与所需NMR信号的空间图案不相关的所获取的MR信号的噪声分量。 在一个实施例中，执行fMRI扫描以获取时间过程图像数据。 NMR数据用信号空间投影算子滤波并重构成一系列图像帧。 在另一个实施例中，采用信号空间投影算子来抑制MRS图像数据中的脂质信号。

公开(公告)号：US07394251B2

公开(公告)日：2008-07-01

申请号：US11484091

申请日：2006-07-11

Applicant: Fa-Hsuan Lin

Inventor： Fa-Hsuan Lin

IPC: G01V3/00

CPC classification number: G01R33/5611 ,  G01R33/4806 ,  G01R33/4824 ,  G01R33/5608 ,  G01R33/56308

Abstract: An fMRI scan is performed using a multi-element head coil and multi-channel receiver to acquire time course image data. One imaging gradient is eliminated from the pulse sequence used to acquire the time course image data enabling images to be acquired at a very high frame rate. The multi-channel NMR data is combined and reconstructed into a series of image frames using an imaging inversion operator.

Abstract translation: 使用多元素头线圈和多通道接收器执行fMRI扫描以获取时间过程图像数据。 从用于获取时间图像数据的脉冲序列中消除一个成像梯度，使得以非常高的帧速率获取图像。 使用成像反演算子将多通道NMR数据组合并重构成一系列图像帧。

公开(公告)号：US07053613B2

公开(公告)日：2006-05-30

申请号：US10859348

申请日：2004-06-03

Applicant: Fa-Hsuan Lin

Inventor： Fa-Hsuan Lin

IPC: G01V3/00

CPC classification number: G01R33/5611

Abstract: The invention relates to a method of parallel imaging reconstruction in parallel magnetic resonance imaging reconstruction. Magnetic resonance data is acquired in parallel by an array of separate RF receiver coils. A reconstruction method based on Tikhonov regularization is presented to reduce the SNR loss due to geometric correlations in the spatial information from the array coil elements. In order to reduce the noise amplification of the reconstruction so-called “g-factor”, reference scans are utilized as a priori information of the final reconstructed image to provide regularized estimates for the reconstruction using the L-curve technique. According to the invention the method with the proposed L-curve approach was fully automatic and showed a significant reduction in average g-factors in the experimental images.

Abstract translation: 本发明涉及一种并行成像重建在平行磁共振成像重建中的方法。 磁共振数据由独立的RF接收器线圈阵列并行获取。 提出了一种基于Tikhonov正则化的重建方法，以减少由于阵列线圈元件的空间信息中几何相关的SNR损失。 为了减少重建所谓的“g因子”的噪声放大，使用参考扫描作为最终重建图像的先验信息，以使用L曲线技术为重建提供正则化估计。 根据本发明，提出的L曲线法的方法是全自动的，并且显示出实验图像中平均g因子的显着降低。