Probably the easiest thing to do would be to fix the outlying image dimension by editing the NIFTI header.  What program are you using to convert from scanner format to NIFTI?  We use dcm2nii in the HCP.

Peace,

Matt.

From: <Book>, Gregory <gregory.b...@hhchealth.org>
Date: Thursday, January 8, 2015 at 12:18 PM
To: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org>
Subject: [HCP-Users] fieldmap processing error

We’ve noticed an error while processing some fMRI data through the HCP pipeline. Several series are failing with the following message:

 

Phase and Magnitude images must have the same number of voxels and voxel dimensions

Current dimensions are:

  Phase image:     80  x 80  x 48  with dims of 3.000000  x 3.000000  x 3.000000  mm

  Magnitude image: 80  x 80  x 48  with dims of 3.000000  x 3.000000  x 3.000001  mm

Fix this (probably in reconstruction stage) before re-running this script

 

Is there any way we can bypass this error? The voxel sizes are only off by 0.000001 mm

It’s also weird, because the pipeline contains 5 runs of the same task, and all use the same fieldmap files. The first task processes fine, but the next 4 fail with this error message.

 

-G

 

_________________________________________________

Gregory Book

Senior Technology Manager

Olin Neuropsychiatry Research Center, Institute of Living, Hartford Hospital

200 Retreat Avenue

Hartford, CT 06106

Tel: 860-545-7267 Fax: 860-545-7797

gregory.b...@hhchealth.org

http://nidb.sourceforge.net

 


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