SynthSR+SyN for fieldmap-less distortion correction #50
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they seem to write files into the working directory (e.g. .keras folder), so this is to avoid potential conflicts.
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This implements a novel SynthSR+SyN method for fieldmap-less distortion correction. It is similar to the SyN method used in SDCFlows, except, the b0 and T1w images are transformed to T1w-like 1mm images before performing registration, which makes the registration much more robust.
This is now set-up as a the default method to use when topup cannot be used (ie no opposite phase encoding directions).
Also a couple other miscellaneous changes here: