Hi Deryk - This variable is only used to average lowb images to create a mask, so in your case you can set it to 2 and it'll just use the first 2 volumes from your nii file. Sorry for the confusion!
a.y On Fri, 10 Jun 2011, Deryk S. Beal, Ph.D. wrote:
Dear Tracula Users Does Tracula assume that the number of B0 scans, specified in Step 7.3 of the config file tutorial (below), are the first X number of volumes in the 4Dnii.gz file or will the Tracula routines know from the bvals file where the B0 scans are ordered in the file? For example, I have two runs of 16 directions + 2 B0s each for each of my subjects. I have merged the two runs together and the resulting file has the volumes ordered such that the bvals are entered into Tracula as follows: 0 0 1000 1000 1000 etc 0 0 1000 1000 1000 etc My question pertains to the following part of the Tracula config file: Step7.3: Specifying Number Of low-b Images The last step to set up if not using original DICOMs would be to specify the number of low-b images with the following variable: set nb0 = *No. of low-b images* Thank you in advance for your help. Cheers, Deryk Deryk S. Beal, Ph.D., CCC-SLP, S-LP(C), Reg. CASLPO Speech-Language Pathologist C.I.H.R. Post Doctoral Research Fellow Department of Cognitive and Neural Systems Speech Laboratory Boston University, 677 Beacon Street, Boston, MA 02215 dsb...@bu.edu http://blogs.bu.edu/dsbeal/about/ ************************************************************************* This email may contain confidential and/or privileged information for the sole use of the intended recipient. Any review or distribution by others is strictly prohibited. If you have received this email in error, please contact the sender and delete all copies. Opinions, conclusions or other information expressed or contained in this email are not given or endorsed by the sender unless otherwise affirmed independently by the sender.
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