Hi Chris,

Sorry for the delay. Would I need to decompress each individual .dcm within a folder and then try to run dcm2niix again? 

For example in this folder alone there are ~3959 dicoms. I've just tried running gdcmconc -w command on a single .dcm file and it seems to have worked. Assume I just need to loop through them all to apply this decompression and then try dcm2niix again?

Thanks,

Amy