Abstract #4210

Improved Temporal Resolution TWIST Reconstruction using Annihilating Filter-based Low-rank Hankel Matrix

Eun Ju Cha¹, Kyong Hwan Jin¹, Dong-Wook Lee¹, Eung Yeop Kim², Seung-Hong Choi³, and Jong Chul Ye¹

¹KAIST, Daegeon, Korea, Republic of, ²Gacheon Unversity Gil Medical Center, Incheon, Korea, Republic of, ³Seoul National University Hospital, Seoul, Korea, Republic of

In dynamic contrast enhanced (DCE) MRI, temporal and spatial resolution can be improved by time-resolved angiography with interleaved stochastic trajectories (TWIST). However, due to view sharing, the temporal resolution of TWIST is not a true one. To overcome this limitation, we employ recently proposed annihilating filter-based low rank Hankel matrix approach (ALOHA) that interpolates the missing k-space data by performing low-rank matrix completion of weighted Hankel matrix. In vivo results showed considerably better temporal resolution than standard TWIST reconstruction.

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