It will mean that the direction information in the file will not be valid, so you will not be able to tell left from right or top from bottom. The pixel data should be ok

On 05/10/2017 12:20 PM, shi yao wang wrote:

Dear FS experts:

There are some error message when I running recon-all as following:

WARNING: neither NIfTI-1 qform or sform are valid

WARNING: your volume will probably be incorrectly oriented

Are there any problem in raw data? I am using MRICRON to convert DICOM to nii

thanks Lawrence

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