We've had a similar issue when using MRIconvert (mcverter) to convert dicom to nifti. Our anatomical images have this slice timing pattern 5, which isn't part of the Nifti standard. Also, mcverter outputs a blank sform matrix, which causes other problems. The easiest fix is to run the following magic:

fslmaths /PATH/TO/IMAGE.nii /PATH/TO/IMAGE.nii

A potentially better long-term fix is to switch dicom to nifti converters. We've been having success with dcm2nii, which is part of mricron.

Good luck, --Greg

____________________________________________________________________ Greg Burgess, Ph.D. Staff Scientist, Human Connectome Project Washington University School of Medicine Department of Anatomy and Neurobiology Email: burgessg@pcg.wustl.edu