Are you using a 32-channel coil? It looks like B1- receive field inhomogeneity to me.
Peace, Matt. From: youngmin huh <ymin1...@gmail.com> Date: Monday, November 12, 2012 10:22 PM To: Bruce Fischl <fis...@nmr.mgh.harvard.edu>, <freesurfer@nmr.mgh.harvard.edu> Subject: Re: [Freesurfer] bad acquisition and noise problem. Hi, 3D SPGR sequences were used. (TR=22, TE=4, thickness=1.4, FOV=240*240, FA=40) If the artifacts are due to B0 distortion, I wonder how I can fix it. Thanks, Youngmin Huh 2012/11/12 Bruce Fischl <fis...@nmr.mgh.harvard.edu> > Can you give us the acquisition details? I suspect this is not noise, but > rather B0 distortion. > what is the acquisition? And what bandwidth? > > > On Nov 8, 2012, at 2:53 AM, youngmin huh <ymin1...@gmail.com> wrote: > >> > Dear all, >> > >> > I'm working with some images, and they have so much noises on temporal >> areas. >> > I just ran recon2, but not sure if they'll be segmented properly. >> > Does anyone have a recommendation for dealing with it? >> > I wonder if there is any flag or option for this occasion. >> > I would appreciate any comments or help. >> > I attached an example. >> > >> > Thanks, >> > >> > Youngmin Huh >> > <temporal_001.jpg> > > > 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. > _______________________________________________ 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.
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