Hello,

We collected a multimodal imaging dataset using a Siemens Magnetom (prisma_fit) scanner. I used dcm2niix version v1.0.20210317 to convert the data to nifti format. During the conversion step, I am getting several warnings. Specifically, the warning during conversion of the functional data is "Warning: Adjusting for negative MosaicRefAcqTimes (issue 271)". According to our acquisition protocol, motion correction was off for the functional scan. The resulting image looks ok and the TR/TE in the .json file matches acquisition parameters. I saw in previous posts this is likely a false alarm but wanted to get your input. 

I get the same negative MosaicRefAcqTimes (issue 271) warning for the conversion of DTI data and a high resolution T2-weighted scan of the hippocampus. Additionally, we get the warning "Warning: interpolated protocol 'anat' may be unsuitable for dwidenoise/mrdegibbs' when converting the FLAIR and neuromelanin scans. Again, the resulting images look ok. Is this a cause for concern?

Thanks in advance!
Jenna