Meeting Banner
Abstract #3148

RESDORE: Robust Estimation in Spherical Deconvolution by Outlier Rejection

Greg D. Parker1, 2, David Marshall2, Paul L. Rosin2, Nicholas Drage3, Stephen Richmond3, Derek K. Jones1

1CUBRIC, School of Psychology, Cardiff University, Cardiff, South Glamorgan, United Kingdom; 2School of Computer Science, Cardiff University, Cardiff, South Glamorgan, United Kingdom; 3School of Dentistry, Cardiff University, Cardiff, South Glamorgan, United Kingdom


We present a novel method for robust estimation of fibre orientation distribution functions through diffusion weighted signal outlier rejection. Our algorithm combines aspects of the Richardson-Lucy spherical deconvolution with a non negative sparse coder to produce an adaptive signal dictionary that 'learns' compensations for common non-axially symmetric noise/corruption while preserving signals arising from complex fibre architecture. This has the effect of improving both fODF estimation and (by studying the dictionary adaptations) the robustness of outlier identification.