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Abstract #0663

Improved angular resolution at low b-values in Diffusion Spectrum Imaging through Radial acquisition in q-space

Steven Baete 1,2 and Fernando Emilio Boada 1,2

1 Center for Biomedical Imaging, Dept. of Radiology, NYU Langone Medical Center, New York, New York, United States, 2 CAI2R, Center for Advanced Imaging Innovation and Research, NYU Langone Medical Center, New York, New York, United States

In the conventional rectangular sampling of q-space in Diffusion Spectrum Imaging, the angular resolution attainable is proportional to the number of shells and the highest b-value acquired. Hence, increasing angular resolution results in acquiring more samples and increasing acquisition time. In this abstract, the angular resolution of the recently proposed radial q-space sampling is shown to be independent of the number of shells acquired above a certain threshold. This results in improved DSI reconstructions at a lower number of shells and at shorter acquisition times, as illustrated by in vivo brain data and computer simulations.

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