波谱学杂志Issue(3)：419-429,11.DOI:10.11938/cjmr20150303
结合导航回波与压缩感知进行运动伪影矫正
Motion Artifacts Correction in MRI with Navigator Echo Combined with Compressed Sensing
摘要
Abstract
In MRI, rigid-body motion with limited amplitude can be tracked effectively by using navigator echo, and then corrected with the information provided by the navigator echo. However, tracking and correction of large and/or non-rigid motion artifact by means of navigator echo could be problematic. Images with a sparse representation in a given domain can be accurately reconstructed from undersampled datasets by using nonlinear reconstruction algorithms, such as compressed sensing. In this study, we developed an imaging technique using pseudo-randomk-space trajectory for acquisition combined with motion tracking by navigator echo. After discarding the motion corrupted lines ink-space, the randomly undersampled dataset was reconstructed using compressed sensing. Experimental results demonstrated that good image quality can be obtained with this technique even in the presence of large non-rigid motions.关键词
磁共振成像(MRI)/运动伪影/导航回波/压缩感知Key words
MRI/motion artifacts/navigator echo/compressed sensing分类
数理科学引用本文复制引用
董芳,王前锋,郑慧,李智敏,杨光,李建奇..结合导航回波与压缩感知进行运动伪影矫正[J].波谱学杂志,2015,(3):419-429,11.基金项目
国家自然科学基金资助项目(81271533) （81271533）
