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Abstract #0751

Rotational invariants of the cumulant expansion (RICE)

Santiago Coelho1, Els Fieremans1, and Dmitry S. Novikov1
1Center for Advanced Imaging Innovation and Research (CAI2R), Department of Radiology, New York University, School of Medicine, New York, NY, United States


We studied the symmetries of the diffusion and covariance tensors, both accessible through a general b-tensor acquisition. We showed that there is an unexplored contrast in the non-symmetric part of the covariance tensor and use it to compute the size-shape covariance of compartmental diffusion tensors. We measure all rotational invariants of the cumulant tensors in a normal volunteer, explore the novel size-shape contrast, and provide the relations between these invariants and typical diffusion contrasts.

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