open-discussion > How to convert .dat to .nifti
Showing 1-8 of 8 posts
Display:
Results per page:
Mar 8, 2011  03:03 AM | Riccardo Navarra
How to convert .dat to .nifti
Hi. I need to convert .dat files (as JHU Neonate Atlas in  http://lbam.med.jhmi.edu/ ; JHU_neonate_linear_b0.dat .. JHU_neonate_SS_t2ss.dat ) in Nifti? How to?
Tnx,

Riccardo


 
Mar 8, 2011  06:03 AM | Jochen Weber
RE: How to convert .dat to .nifti
Hey Riccardo,

Try downloading the file(s), rename the extension to .img, and then add the attached file as corresponding .hdr file?

Best,
/jochen
Mar 8, 2011  07:03 AM | Riccardo Navarra
RE: How to convert .dat to .nifti
Ok for JHU_neonate_linear_xxx and JHU_neonate_nonlinear_xxx but it doesn't work for JHU_neonate_SS_xxx :)
I need another .hdr for "SS" files? 

Tnx,

Riccardo
Mar 8, 2011  09:03 AM | Jochen Weber
RE: How to convert .dat to .nifti
Sorry I didn't check the SS files. They have a different datatype (16-bit integer instead of 32-bit float). Here's the header for those...

/jochen
Mar 9, 2011  02:03 AM | Riccardo Navarra
RE: How to convert .dat to .nifti
Thank you again! Last issue :)
I view (by MRIcron) many files by using "1st" or "2nd" hdr but I got these errors:


View - HDR - File - Error:

NO - 1st hdr - JHU_neonate_linear_color.dat       (Error: This image file is smaller ... Expected: 28512000 Selected 21384000 )
NO - 1st hdr - JHU_neonate_nonlinear_color.dat    (Error: This image file is smaller ... Expected: 28512000 Selected 21384000 )
NO - 1st hdr - JHU_neonate_SS_122parcellation.dat (Error: This image file is smaller ... Expected: 28512000 Selected 7128000 )
NO - 1st hdr - JHU_neonate_SS_color.dat           (Error: This image file is smaller ... Expected: 28512000 Selected 21384000 )

NO - 2nd hdr - JHU_neonate_linear_color.dat       
NO - 2nd hdr - JHU_neonate_nonlinear_color.dat    
NO - 2nd hdr - JHU_neonate_SS_122parcellation.dat (Error: This image file is smaller ... Expected: 14256000 Selected 7128000 )
NO - 2nd hdr - JHU_neonate_SS_color.dat 


How to view these files?

Best Regards,

Riccardo
Mar 9, 2011  10:03 AM | Jochen Weber
RE: How to convert .dat to .nifti
The _color.dat files are in RGB datatype (see attached _color.hdr file), but I wasn't able to display those in either SPM or MRIcron (I don't know of any program that actually supports RGB-coded NIFTI files).

Best,
/jochen
Mar 9, 2011  10:03 AM | Jochen Weber
RE: How to convert .dat to .nifti
The _122parcellation.dat files are in byte (uint8) datatype (see attached .hdr file). Those should work fine...
Mar 10, 2011  08:03 AM | Riccardo Navarra
RE: How to convert .dat to .nifti
Dear Jochen,
with lasts .hrd I can view all files now. I can convert "parcellation" to nifti too (I need to modify cal_max and cal_min in nifti header but no matters ;) ) To view RGB files I used ITK-SNAP successfully.
Thank you for support.

Riccardo