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Abstract #2384

Quadratic phase-modulated xSPEN (QxSPEN): A new route to high resolution single-shot imaging

Ke Dai1,2, Zhiyong Zhang2, and Lucio Frydman1,3
1Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel, 2School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China, 3Azrieli National Center for Brain Imaging, Weizmann Institute of Science, Rehovot, Israel

Synopsis

Keywords: Pulse Sequence Design, New Trajectories & Spatial Encoding MethodsSingle-shot cross-term SPatiotemporal ENcoding (xSPEN) is a single-shot approach to MRI with exceptional resilience to field inhomogeneities. xSPEN’s non-Fourier nature and sinc-like point-spread function demands SNR/resolution compromises which, so far, no post-processing has managed to solve. This study shows that introducing a quadratic phase modulation in conjunction with the hyperbolic phase modulation demanded by xSPEN can solve this, enabling the use of deconvolution principles providing resolution enhancement. The principles and examples of the ensuing quadratic xSPEN (QxSPEN) experiment, are presented on synthetic, phantom and human brain single-shot data.

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