公开(公告)号：US20170363702A1

公开(公告)日：2017-12-21

申请号：US15618979

申请日：2017-06-09

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

Inventor： Xi PENG ,  Dong LIANG ,  Xin LIU ,  Hairong ZHENG

IPC: G01R33/563 ,  G01R33/56

CPC classification number: G01R33/56341 ,  A61B5/055 ,  A61B5/7203 ,  G01R33/5602 ,  G06T5/002 ,  G06T2207/10092

Abstract: The application provides a method, apparatus and computer program product for denoising a magnetic resonance diffusion tensor, wherein the method comprises: collecting data of K space; calculating a maximum likelihood estimator of a diffusion tensor according to the collected data of K space; calculating a maximum posterior probability estimator of the diffusion tensor by using sparsity of the diffusion tensor and sparsity of a diffusion parameter and taking the calculating maximum likelihood estimator as an initial value; and calculating the diffusion parameter according to the calculated maximum posterior probability estimator. The application solves the technical problem in the prior art of how to realize high precision denoising of diffusion tensor while not increasing scanning time and affecting spatial resolution, achieves the technical effects of effectively suppressing noises in the diffusion tensor and improving the estimation accuracy of the diffusion tensor.

公开(公告)号：US20160370444A1

公开(公告)日：2016-12-22

申请号：US15103845

申请日：2014-12-05

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES

Inventor： Xi PENG ,  Dong LIANG ,  Xin LIU ,  Hairong ZHENG

IPC: G01R33/50 ,  G01R33/561 ,  G01R33/56

CPC classification number: G01R33/561 ,  G01R33/50 ,  G01R33/5608 ,  G01R33/5611

Abstract: Disclosed is a magnetic resonance rapid parameter imaging method and system. The method comprises: obtaining a target undersampled magnetic resonance signal (S10); obtaining prior information of a parameter model (S20); performing sequence reconstruction of a target image according to the undersampled magnetic resonance signal and the prior information to obtain a target image sequence (S30); and substituting the target image sequence into the parameter estimation model to obtain object parameters and to generate parametric images (S40).

Abstract translation: 公开了一种磁共振快速参数成像方法和系统。 该方法包括：获得目标欠采样磁共振信号（S10）; 获取参数模型的先验信息（S20）; 根据欠采样的磁共振信号和先验信息执行目标图像的序列重构以获得目标图像序列（S30）; 并且将目标图像序列代入参数估计模型以获得对象参数并生成参数图像（S40）。