Abstract #0870

In vivo accelerated MR parameter mapping using annihilating filter-based low rank Hankel matrix (ALOHA)

Dongwook Lee¹, Kyong Hwan Jin¹, Eung-yeop Kim², Sunghong Park¹, and Jong Chul Ye¹

¹Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea, Republic of, ²Radiology, Gachon University Gil Medical Center, Inchoen, Korea, Republic of

The purpose of this study is to develop an accelerated MR parameter mapping technique. For accelerated T1 and T2 mapping, spin-echo inversion recovery and multi-echo spin echo pulse sequences were redesigned to perform undersampling along phase encoding direction. The highly missing k-space were then interpolated by using recently proposed annihilating filter based low-rank Hankel matrix approach (ALOHA). By exploiting the duality between the transform domain sparsity and the low-rankness of weighted Hankel structured matrix in k-space, ALOHA provided outperforming reconstruction results compared to the existing compressed sensing methods.

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