Generalized MRI reconstruction with correction for multiple image distortion
    21.
    发明授权
    Generalized MRI reconstruction with correction for multiple image distortion 有权
    广泛MRI重建与多重图像失真校正

    公开(公告)号:US07408345B2

    公开(公告)日:2008-08-05

    申请号:US11348852

    申请日:2006-02-06

    IPC分类号: G01V3/00

    摘要: Disclosed is an effective algorithm to correct motion-induced phase error using an iterative reconstruction. Using a conjugate-gradient (CG) algorithm, the phase error is treated as an image encoding function. Given the complex perturbation terms, diffusion-weighted images can be reconstructed using an augmented sensitivity map. The mathematical formulation and image reconstruction procedures are similar to the SENSE reconstruction. By defining a dynamic composition sensitivity, the CG phase correction method can be conveniently incorporated with SENSE reconstruction for the application of multi-shot SENSE DWI. Effective phase correction and multi-shot SENSE DWI (R=1 to 3) are demonstrated on both simulated and in vivo data acquired with PROPELLER and SNAILS.

    摘要翻译: 公开了一种使用迭代重建来校正运动诱发相位误差的有效算法。 使用共轭梯度(CG)算法,相位误差被视为图像编码功能。 给定复杂的扰动项,扩散加权图像可以使用增强的灵敏度图重建。 数学公式和图像重建程序与SENSE重建相似。 通过定义动态组合灵敏度,CG相位校正方法可以方便地结合SENSE重建用于多镜头SENSE DWI的应用。 在使用PROPELLER和SNAILS获取的模拟和体内数据中都可以证明有效的相位校正和多镜头SENSE DWI(R = 1到3)。

    Dual gradient echo pulse sequence using interleaved spiral-out spiral-in k-space trajectories
    22.
    发明申请
    Dual gradient echo pulse sequence using interleaved spiral-out spiral-in k-space trajectories 有权
    双梯度回波脉冲序列使用交错螺旋线螺旋k空间轨迹

    公开(公告)号:US20060062731A1

    公开(公告)日:2006-03-23

    申请号:US10944084

    申请日:2004-09-17

    IPC分类号: A61K49/00

    摘要: Measurements of functional, hemographic, and blood flow parameters use a multiple echo or spin echo gradient pulse sequence whereby an early echo is acquired near the beginning of the pulse sequence which avoids saturation effects and a later echo near the end of the pulse sequence which can provide information with more sensitivity to a contrast agent for a susceptibility weighted image.

    摘要翻译: 功能,血液动力学和血液流动参数的测量使用多重回波或自旋回波梯度脉冲序列,从而在脉冲序列开始附近获得早期回波,其避免了饱和效应,并且在脉冲序列结束附近的后来的回波 提供对敏感性加权图像的造影剂更敏感的信息。