Hi Sal - I apologize for the late response due to traveling. With tracula we have certainly used 30 direction data. It shouldn't be a problem, since tracula fits the ball-and-stick model of diffusion of Behrens et al 2007, which has been shown to give reasonable results fitting 2 crossing fibers with 30 directions.
Hope this helps, a.y On Mon, 18 Nov 2013, Salil Soman wrote: > > Hi, > > I hope all is well. > > Was wondering if any of had heard of an explicit minimum number of DTI > directions necessary for using odf / hardi modeling ? I have run a couple of > data sets of 30 directions (+ 5 b0) through TRACULA, and have run this same > data through diffusion toolkit using the hardi / odf model, with reasonable > looking results. I was wondering if there was any specific reason why using > these models with 30 directions would be considered in appropriate? > > Thanks! > > Sal > > > > > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
