for 3T scans, try this modification to the nu_correct usage in recon-all. first, create a file called 'xopts' with this one line:
mri_nu_correct.mni --proto-iters 1000 --distance 50 then, run recon-all with these params: recon-all -s subjid \ -nuintensitycor \ -nuiterations 1 \ -expert <path>/<to>/xopts the new flags being '-nuiterations 1 -expert ./xopts'. these params are taken from a new paper: http://web.mysites.ntu.edu.sg/zvitali/publications/documents/N3_NI.pdf also, mri_nu_correct.mni --help provides help info. n. On Mon, 2010-04-26 at 21:48 +0200, Leonardo Chesi wrote: > Dear all, > > I’m Leonardo, a student of the University of Pisa. We study AD’s > patients by MRI. In the last days I had have many problems with the > segmentation because of the B0 inhomogeneity with a 8 channel phased > array coil on a 3.0 T General Electric machine. In some articles I > have found the nu_correct command that provide to normalize the image. > I’m writing to you to ask if some of you know the optimal parameters > to give input to nu_correct to normalize as well as it possible the > image. I’ve try with the default parameters and my segmentation is > already better than the previous. > > Moreover I’d like to know if there is a manual of this command because > on the FreeSurfer Wiki I can’t find detailed information. > > I’m waiting for your corteous help. > > Greetings > > Leonardo > > > _______________________________________________ > Freesurfer mailing list > [email protected] > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer _______________________________________________ Freesurfer mailing list [email protected] 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.
