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MRI reconstruction based on compound regularizers and compressed sensing
Author(s): 
Pages: 350-355
Year: Issue:  3
Journal: Optical Technique

Keyword:  MRI图像重构压缩传感联合正则化共轭梯度法;
Abstract: 基于压缩传感的MRI图像重构利用图像稀疏的先验知识能从很少的投影值重构原图像.目前MRI重构算法只利用MRI图像稀疏性表示或只利用基于其局部光滑性的先验知识,重构效果不理想.针对此问题,结合两种先"验知识,提出一种基于联合正则化及压缩传感的MRI图像重构方法.利用块坐标下降法将求解联合正则化问题转化为‘‰交替求解二次凸优化、稀疏正则化和全变差正则化三个简单的优化问题.并提出分别采用共轭梯度法、二元...
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