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Abstract #3611

DISCUS: Diffusion MRI Signal Reconstruction with Continuous Sampling

Christian Ewert1, David Kügler1, Anastasia Yendiki2,3, and Martin Reuter1,2,3
1AI in Medical Imaging, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany, 2Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA, United States, 3Department of Radiology, Harvard Medical School, Boston, MA, United States

Synopsis

Keywords: Image Reconstruction, Diffusion/other diffusion imaging techniques, q-space, denoisingDISCUS addresses two challenges currently limiting the analysis potential of diffusion MRI: sparsity of measurements and variability in q-space sampling schemes. Our method combines the advantages of model-fit approaches with continuous sampling (spherical harmonics, SHORE) and rigid, discrete learning-based methods. DISCUS can be initialized from any acquisition scheme and permits signal prediction for an arbitrary q-vector. Despite the added flexibility, DISCUS performs on par with other, far less flexible learning methods, while outperforming model-fit methods. DISCUS-derived signals translate to higher-quality FA estimates promising accurate analyses even from very short acquisitions.

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Keywords