https://www.na-mic.org/w/index.php?action=history&feed=atom&title=NAMIC-Dartmouth-DWI-to-NRRD-Format 2026-04-20T01:05:08Z Revision history for this page on the wiki MediaWiki 1.33.0 https://www.na-mic.org/w/index.php?title=NAMIC-Dartmouth-DWI-to-NRRD-Format&diff=4586&oldid=prev 2006-12-18T19:21:40Z

<p>Update from Wiki</p> <p><b>New page</b></p><div>Note: please also see [[NAMIC-Dartmouth-DWI|this page about NRRD headers which refer to the original image files]], without the need for any additional data reading with MATLAB.<br /> <br /> The following MATLAB script converts the Dartmouth DWIs into a single file in which the volumes (2 baselines and 12 diffusion weighted images) are in the appropriate space. The resulting raw image, together with [[NAMIC-Dartmouth-nrrdheader|a nrrd header]], are used by Slicer to do DTI analysis.<br /> <br /> fpout = fopen('nrrdraw.raw', 'w');<br /> for k = 1:14;<br /> % for subject 1,2,4,5 the slice order is Superior-Inferior, need to<br /> % reverse order<br /> % for m = 36:-1:1<br /> % for subject 3, 6, the slice order is Inferior-superior<br /> for m = 1:36<br /> n = (k-1)*36+m;<br /> % use appropriate dicom prefix<br /> name = sprintf('S8.%03d', n);<br /> fp = fopen(name);<br /> fseek(fp, -65536*2, 'eof');<br /> A = fread(fp, [256 256], 'short');<br /> fclose(fp);<br /> fwrite(fpout, A, 'short');<br /> end<br /> end<br /> fclose(fpout);</div>

Andy