波谱学杂志2018，Vol.35Issue(1)：31-39,9.DOI:10.11938/cjmr20172578
一种结合并行成像和压缩感知的快速磁共振成像新方法
A New Combination Scheme of GRAPPA and Compressed Sensing for Accelerated Magnetic Resonance Imaging
摘要
Abstract
Both compressed sensing (CS) and parallel imaging (PI) can be used to accelerate magnetic resonance imaging (MRI) by under-sampling the k space data.Several methods combining CS and PI have been proposed to further improve the scanning speed.In this paper,we proposed a new approach to combine CS and PI.We used GRAPPA (Generalized Autocalibrating Partially Parallel Acquisitions) algorithm to reconstruct local under-sampled k space data,and CS to reconstruct the whole k space data for each coil.In the CS reconstruction step,we constrained that the reconstructed k space data should be assimilated to both the sampled k space data and the reconstructed k space data by GRAPPA.In addition,we designed a new sampling strategy to improve the quality of image reconstruction.In vivo imaging results demonstrated that the proposed approach could effectively remove artifacts and improve the image quality.关键词
磁共振成像(MRI)/压缩感知(CS)/并行成像/稀疏采样Key words
magnetic resonance imaging (MRI)/compressed sensing (CS)/parallel imaging (PI)/sparse sampling分类
数理科学引用本文复制引用
黄丽洁,宋阳,赵献策,谢海滨,吴东梅,杨光..一种结合并行成像和压缩感知的快速磁共振成像新方法[J].波谱学杂志,2018,35(1):31-39,9.基金项目
国家高技术研究发展计划(“863计划”)资助项目(2014AA123400). （“863计划”）
