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Abstract #2249

Improved SPEED Reconstruction with Combined Sparsifying Operations

Zhaoyang Jin1, Qing-Sang Xiang2

1Institute of Information and Control, Hangzhou Dianzi University, Hangzhou, Zhejiang, China; 2Radiology Department, University of British Columbia, Vancouver, BC, Canada

Skipped phase encoding and edge deghosting (SPEED) is an effective method for scan time reduction. Similar to compressed sensing, it uses a sparsifying operation in the reconstruction process. Previously, this was realized with a simple differential operation. This study investigated wavelet transform as another option. Results from differential, wavelet, and combined operations were compared. It was found that the wavelet approach can have reduced reconstruction error than the original differential approach, and when the two operations are combined in a series, even smaller reconstruction error was achievable.