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Abstract #0516

“Windowed” Composite Reconstruction Improves Rotating Short-Axis High-Resolution DWI (RSA-DWI) in both Simulation and Human data

Qiuting Wen1, Chandana Kodiweera2, and Yu-Chien Wu1

1Radiology and Imaging Sciences, Indiana University, Indianapolis, IN, United States, 2Darmonth College, Hanover, NH, United States

High-resolution DWI often relies on multi-shot acquisitions, which suffer from long acquisition time and motion-related phase issues. However, highly correlated information exists in DWIs as they are weighting the same structure. To take advantages of this feature, rotating short-axis DWI was proposed to accelerate DWI acquisition by acquiring only one rotating blade per diffusion direction. In the previous reconstruction, high-resolution DWI was achieved by integrating the full set of DWIs. In this work, we propose a “windowed” composite reconstruction where only a subset of DWIs was selected to reconstruct each high-resolution DWI. Improved image quality was appreciated in both simulation and human data.

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