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What have your steps been before getting to this point? The magnitude image is not in radians - that’s the phase image. It sounds like maybe there is something getting mixed up along the way. On Thu, Oct 25, 2018 at 17:34 Daniel Callow <[log in to unmask]> wrote: > I figured out that the input I needed to have for the magnitude file > needed to include a .gz at the end. Thanks for your help! I am running inot > another issue now though. > > When I run fsl_prepare_fieldmap I get the error message > > Loading volumes > Phase loaded > Magnitude loaded > Mask loaded > ERROR: input phase image exceeds allowable phase range. > Allowable range is 6.283 radians. Image range is: 12.5541 radians. > Aborting. > Cannot open volume /tmp/fsl_cvXneJ_tmp_ph_radians_unwrapped for reading! > Image Exception : #22 :: ERROR: Could not open image > /tmp/fsl_cvXneJ_tmp_ph_rps > terminate called after throwing an instance of 'RBD_COMMON::BaseException' > Aborted (core dumped) > Cannot open volume fmap_rads for reading! > Image Exception : #22 :: ERROR: Could not open image > /tmp/fsl_cvXneJ_tmp_fmapmasked > Cannot open volume fmap_rads for reading! > Image Exception : #22 :: ERROR: Could not open image fmap_rads > terminate called after throwing an instance of 'RBD_COMMON::BaseException' > Aborted (core dumped) > Cannot open volume /tmp/fsl_cvXneJ_tmp_fmapfilt for reading! > Cannot open volume fmap_rads for reading! > Done. Created fmap_rads for use with FEAT. > > My magnitude image is the average of two magnitude field maps. could this > be causing the problem (12.5 rads instead of allowable 6.2 rads)? > > ######################################################################## > > To unsubscribe from the FSL list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1 > -- Niels Bergsland Integration Director / Research Assistant Professor of Neurology Buffalo Neuroimaging Analysis Center / University at Buffalo 100 High St. Buffalo NY 14203 [log in to unmask] ######################################################################## To unsubscribe from the FSL list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1