open-discussion > RE: phase encoding direction
May 8, 2024  03:05 PM | tu ruilin
RE: phase encoding direction

Hi, Martin


Thanks for the reply! As I am kind of new in DWI analysis, I have some quetions about these data, and apologize in advance for the following questions.


1. I noticed  the orientation of the raw DWI data differs from the processed data, so I reoriented the raw data using 3D Slicer and fslswapdim before preprocessing. However, I'm not sure if this method alters the bvecs. If so, is there a better way to reorient the data (the same orientation with the processed T1 images) and output the corresponding bvecs?
2. When using FSL's eddy for Eddy Current Correction, is it reasonable to set the parameter of acqp.txt to -1 0 0 0.1 (since there is no phase encoding direction, I arbitrarily chose one direction).


Best,
Ruilin Tu

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TitleAuthorDate
tu ruilin May 2, 2024
Martin Styner May 2, 2024
tu ruilin May 6, 2024
Martin Styner May 7, 2024
RE: phase encoding direction
tu ruilin May 8, 2024
Martin Styner May 13, 2024