波谱学杂志2016，Vol.33Issue(4)：515-527,13.DOI:10.11938/cjmr20160401
基于AFI的快速发射场B1+成像方法
RapidB1+ Mapping Based on Actual Flip-Angle Imaging
摘要
Abstract
We propose a fast B1+ mapping method (FAFI) based on actual flip-angle imaging (AFI), in which the single-echo gradient echo (GRE) acquisition in the conventional AFI sequence is replaced by a multi-shot echo planar imaging (Multi-shot EPI) acquisition. FAFI makes full use of the waiting time, and thus has greatly increased imaging speed. We evaluated the performance of FAFI on phantoms and human subjects (n = 16), and compared the results with those obtained using the conventional AFI method. It was demonstrated that it was possible to achieve high acceleration factor with FAFI, while preserving good consistency with the conventional AFI results. FAFI provides a powerful tool for dynamic B1+ mapping, and may find applications in dynamicB1+ shimming and rapid spatially selective radio frequency (RF) excitation.关键词
磁共振成像(MRI)/发射场图/实际翻转角成像(AFI)/平面回波成像(EPI)/动态匀场Key words
MRI/B1+ mapping/actual flip-angle imaging (AFI)/echo planar imaging (EPI)/dynamicB1+shimming分类
数理科学引用本文复制引用
周子堃,胡凌志,蒋瑞瑞,贺强,张卫国,陈群..基于AFI的快速发射场B1+成像方法[J].波谱学杂志,2016,33(4):515-527,13.基金项目
中国科学院重点部署项目(Y325511211) （Y325511211）
