An open-source implementation of estimation and correction of head-motion and eddy-current distortions generalizable across diffusion MRI signal models

We develop an open-source tool for the retrospective estimation of inter-volume head-motion and eddy-current distortions, typically found in diffusion MRI (dMRI) data acquired with echo-planar imaging schemes. The implementation is “open-since-inception” to ensure transparency. By leveraging the widely used DIPY package and a user-friendly interface, researchers have at their disposal an implementation combining state-of-art approaches with substantial improvements that can efficiently leverage any compliant diffusion model(s) while simultaneously accounting for susceptibility distortions.