Improved simultaneous multislice magnetic resonance imaging using total variation regularization  

作　　者：马亚军 李莎 高嵩 

机构地区：[1]Department of Medical Physics, Health Science Center of Peking University [2]Department of Radiotherapy, Beijing Cancer Hospital

出　　处：《Chinese Physics B》2017年第11期550-553,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61671026);the Natural Science Foundation of Beijing,China(Grant No.7162112)

摘　　要：Controlled aliasing in parallel imaging results in higher acceleration （CAIPIRINHA） for simultaneous multislice imaging has been proposed recently, which combines multiband excitation and phase cycling techniques to reduce scan time and improve subsequent imaging reconstruction. In this work, the total variation （TV） regularization method is used to further improve CAIPIRINHA. The TV regularization uses an edge-preserving prior, which establishes a relationship between neighboring pixels for image reconstruction. It reduces artifacts and suppresses noise amplification simultaneously. The results are presented with a standard eight-channel head coil with an acceleration factor of 4, where the TV-regularized CAIPIRINHA generates an improved reconstruction as compared with a typical nonregularized CAIPIRINHA.Controlled aliasing in parallel imaging results in higher acceleration （CAIPIRINHA） for simultaneous multislice imaging has been proposed recently, which combines multiband excitation and phase cycling techniques to reduce scan time and improve subsequent imaging reconstruction. In this work, the total variation （TV） regularization method is used to further improve CAIPIRINHA. The TV regularization uses an edge-preserving prior, which establishes a relationship between neighboring pixels for image reconstruction. It reduces artifacts and suppresses noise amplification simultaneously. The results are presented with a standard eight-channel head coil with an acceleration factor of 4, where the TV-regularized CAIPIRINHA generates an improved reconstruction as compared with a typical nonregularized CAIPIRINHA.

关 键 词：caipirinha simultaneous multislice imaging total variation 

分 类 号：R445.2[医药卫生—影像医学与核医学] TP391.41[医药卫生—诊断学]