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Abstract #5171

Alias-reduced multicoil single-shot spatial temporally encoded MRI with referenceless sensitivity encoding

Ying Chen1, Lisha Yuan1, Yi Sun2, and Jianhui Zhong1

1Center for Brain Imaging Science and Technology, Zhejiang University, Hangzhou, People's Republic of China, 2MR Collaboration Northeast Asia, Siemens Healthcare, Shanghai, People's Republic of China

Single-shot spatiotemporally encoded (SPEN) MRI is a novel fast imaging scheme with remarkably reduced geometric distortions at high field compared to conventional single-shot EPI. The k-space along SPEN dimension is undersampled, resulting in aliases at regions of rapid profile variation. The feasibility of utilizing sensitivity profiles of array receiver coils to unravel the undersampling aliases is investigated. High resolution relative sensitivity profiles can be obtained from multicoil 2D polynomial fitting of the SPEN reconstructed images without additional reference scans. The effectiveness of the SPEN SENSE strategy is validated by healthy human brain scans at 3T.

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