Application of the Compressed Sensing Technique to Self-Gated Cardiac Cine Sequences in Small Animals
Application of the Compressed Sensing Technique to Self-Gated Cardiac Cine Sequences in Small Animals
复制标题
DOI：
10.1002/mrm.24936
复制
发表时间：
2014-08-01
影响因子：
3.3
通讯作者：
Desco, Manuel
中科院分区：
文献类型：
--
作者：
Montesinos, Paula;Abascal, Juan Felipe P. J.;Desco, Manuel
目的：在临床前应用中，自门控电影序列是心脏MRI的常见选择。我们工作的目的是将压缩传感技术应用于大鼠心脏MRI的门内闪光研究中，并找到该技术所能达到的最大加速因子。理论和方法：我们的重建方法扩展了分裂Bregman公式，以最小化空间和时间上的总变化。此外，我们还分析了欠采样模式对加速因子的影响。结果：我们的结果表明，当采用适当的欠采样模式时，可以获得高达15的加速因子。引入时变随机抽样显然提高了欠抽样方案的效率。在计算效率方面，提出的重建方法与文献中发现的最快方法相比具有竞争力。结论：我们成功地将我们的压缩传感技术应用于小动物的自门控心脏电影采集，获得了高达15倍的加速因子，而图像退化几乎不明显。(C)2013年威利期刊公司。
Purpose: Self-gated cine sequences are a common choice for cardiac MRI in preclinical applications. The aims of our work were to apply the compressed sensing technique to IntraGate-FLASH cardiac MRI studies on rats and to find the maximum acceleration factor achievable with this technique.Theory and Methods: Our reconstruction method extended the Split Bregman formulation to minimize the total variation in both space and time. In addition, we analyzed the influence of the undersampling pattern on the acceleration factor achievable.Results: Our results show that acceleration factors of up to 15 are achievable with our technique when appropriate undersampling patterns are used. The introduction of a time-varying random sampling clearly improved the efficiency of the undersampling schemes. In terms of computational efficiency, the proposed reconstruction method has been shown to be competitive as compared with the fastest methods found in the literature.Conclusion: We successfully applied our compressed sensing technique to self-gated cardiac cine acquisition in small animals, obtaining an acceleration factor of up to 15 with almost unnoticeable image degradation. (C) 2013 Wiley Periodicals, Inc.