<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Dear mrtrix users and donald, <br><br>greetings :)<br><br>It was nice to see you in hawaii :)<br><br>I tried to do some new tractography, by including several -exclude ROIs. ( as follows) <br><br>>streamtrack SD_PROB $orig2_dir/CSD12_sf06.mif -seed $orig2_dir/roi/roi1.nii -mask $orig2_dir/mask.mif $orig2_dir/results/roi1_track.tck -include $orig2_dir/roi/roi_2.nii -exclude $orig2_dir/roi/roi_3.nii -exclude $orig2_dir/roi/roi_4.nii<br><br>> 5801844 generated, 1000 selected [100%]<br><br><br>this took almost a day. Is there some way I can reduce the calculation time ? or can run this command on sun grid ( parallel on different machines). We have sun grid engine for few software, but I don't know how to incroporate mrtrix in that. <br><br>Thanx <br><br>vinod<br><br><br><br><br></td></tr></table><br>