回波平面成像中ghost伪影的校正

Journal Title: Science Paper Online - Year 2007, Vol 2, Issue 10

Abstract

EPI技术基于方向相反的频率读出梯度交替采集MR信号的奇、偶回波。但是,由于成像物体的磁敏感性、化学位移及磁场B0不均匀性等因素的影响会导致奇、偶回波之间产生相位移动,因而会产生ghost伪影。本文首先用混合空间投影的方法消除部分伪影;然后用基于相位恢复方法消除ghost伪影。实验结果表明运用该方法能够明显地降低ghost伪影的强度,证明了本文方法的有效性。

Authors and Affiliations

Zhiguo GUI , Huazhong SHU

Keywords

Related Articles

Steel silo design using Indian code

The Janssen`s and Airy`s theories, and the design methods of steel silo in India are introduced. The design principle, parameters and the various silo forms are presented. Finally, the subjects for further study are prop...

气固催化反应流动的CFD-DEM模拟研究

针对复杂气固催化反应流动系统,提出一种新的气固催化反应流动的模型框架,即CFD-DEM反应流模型框架,计算流体力学(CFD)方程用于描述气相的流动和传递行为,离散单元法(DEM)用于描述颗粒相的运动。结合石油催化裂化(FCC)过程,考虑颗粒间...

Plain analysis of acoustical design on the multi-purpose meeting room

The multi-purpose meeting room is one of the familiar performing arts building. As the acoustical design of multi-function meeting room is relatively special, that should be more concerned. This paper presents the acoust...

Evaluation of Taihu Lake’s pollution control based on DYRESM-CAEDYM model

Based on the DYRESM-CAEDYM model developed by Centre for Water Research, the University of Western Australia, this thesis simulates the water quality of Taihu Lake in 2005, settles a set of parameters applicable for the...

Influence of temperature on the synthesis of block copolypeptide templated silica

By using synthetic block copolypeptide Phe20-b-PBLG50 with the phenyl groups in both segments as a template, anilino-methyl triethoxy silane (AMTS) as an intermedium and benzyl ammine as catalyst, nanoporous silica with...

Download PDF file
  • EP ID EP83014
  • DOI -
  • Views 176
  • Downloads 0

How To Cite

Zhiguo GUI, Huazhong SHU (2007). 回波平面成像中ghost伪影的校正. Science Paper Online, 2(10), 725-729. https://europub.co.uk/articles/-A-83014