Nonlinear profile order for three-dimensional hybrid radial acquisition applied to self-gated free-breathing cardiac cine MRI  

作　　者：Yanchun Zhu Pascal Spincemaille Jing Liu Shuo Li Thanh D Nguyen Martin R Prince Yaoqin Xie Yi Wang 朱艳春;Pascal Spincemaille;刘静;李硕;Thanh D Nguyen;Martin R Prince;谢耀钦;王乙(Institute of Biomedical and Health Engineering,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences;Department of Radiology,Weill Cornell Medical College)

机构地区：[1]Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China [2]Department of Radiology, Weill Cornell Medical College, New York 10021, United States

出　　处：《Chinese Physics B》2017年第1期568-573,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.81501463,61671026,81571669,and 81671853);the Natural Science Foundation of Guangdong Province,China(Grant No.2014A030310360);Guangdong Innovative Research Team Program of China(Grant No.2011S013);the Basic Research Project of Shenzhen City,China(Grant Nos.JCYJ20140417113430639 and JCYJ20160429172357751);the High-level Oversea Talent Program of Shenzhen City,China(Grant No.KQJSCX20160301144248);Beijing Center for Mathematics and Information Interdisciplinary Sciences of China

摘　　要：This paper presents a nonlinear profile order scheme for three-dimensional（3D） hybrid radial acquisition applied to self-gated, free-breathing cardiac cine magnetic resonance imaging（MRI）. In self-gated, free-breathing cardiac cine MRI,respiratory and cardiac motions are unpredictable during acquisition, especially for retrospective reconstruction. Therefore,the non-uniformity of the k-space distribution is an issue of great concern during retrospective self-gated reconstruction. A nonlinear profile order with varying azimuthal increments was provided and compared with the existing golden ratio-based profile order. Optimal parameter values for the nonlinear formula were chosen based on simulations. The two profile orders were compared in terms of the k-space distribution and phantom and human image results. An approximately uniform distribution was obtained based on the nonlinear profile order for persons with various heart rates and breathing patterns.The nonlinear profile order provides more stable profile distributions and fewer streaking artifacts in phantom images. In a comparison of human cardiac cine images, the nonlinear profile order provided results comparable to those provided by the golden ratio-based profile order, and the images were suitable for diagnosis. In conclusion, the nonlinear profile order scheme was demonstrated to be insensitive to various motion patterns and more useful for retrospective reconstruction.This paper presents a nonlinear profile order scheme for three-dimensional（3D） hybrid radial acquisition applied to self-gated, free-breathing cardiac cine magnetic resonance imaging（MRI）. In self-gated, free-breathing cardiac cine MRI,respiratory and cardiac motions are unpredictable during acquisition, especially for retrospective reconstruction. Therefore,the non-uniformity of the k-space distribution is an issue of great concern during retrospective self-gated reconstruction. A nonlinear profile order with varying azimuthal increments was provided and compared with the existing golden ratio-based profile order. Optimal parameter values for the nonlinear formula were chosen based on simulations. The two profile orders were compared in terms of the k-space distribution and phantom and human image results. An approximately uniform distribution was obtained based on the nonlinear profile order for persons with various heart rates and breathing patterns.The nonlinear profile order provides more stable profile distributions and fewer streaking artifacts in phantom images. In a comparison of human cardiac cine images, the nonlinear profile order provided results comparable to those provided by the golden ratio-based profile order, and the images were suitable for diagnosis. In conclusion, the nonlinear profile order scheme was demonstrated to be insensitive to various motion patterns and more useful for retrospective reconstruction.

关 键 词：nonlinear profile order hybrid radial SELF-GATING cardiac cine MRI 

分 类 号：R445.2[医药卫生—影像医学与核医学]