Hello again AFNI people,

I have been tasked with figuring out a way to import ROI tracings from ANALYZE into AFNI so that we can overlay them onto 3D+time datasets and extract functional information.

After scanning, all of our data was reconstructed from DICOM to AFNI format. Then, for tracing, the anatomical dataset was put into ANALYZE format using 3dAFNItoANALYZE -orient LPI. In ANALYZE, the hippocampal tracings were saved as .obj files (object maps).

So, I have been resaving all of these object maps as .hdr/.img files, and then using 3dcopy to transform them into AFNI's .BRIK/.HEAD format.

The issue is the alignment between these AFNI-formatted tracings and each subject's anatomical/functional data in AFNI. The traced ROIs are shifted towards the back of the head, and down. This seems to be happening in a consistent way for all subjects. I'm assuming this alignment issue is related to the warning I get when I use 3dcopy to transform the traced ROIs into AFNI....WARNING: No ANALYZE origin found in file tracing_6029_0000.hdr.

I'm wondering if there is anything that can be done to properly align each subject's tracing with their anatomical/functional data?

Thanks in advance,
Liesel