That subjects looks like a candidate for exclusion, because the SNR anteriorly is much less than posteriorly. It looks to me like there is either a problem with your head coil, or the anterior coil elements were not active.
cheers, -MH
-- Michael Harms, Ph.D. ----------------------------------------------------------- Conte Center for the Neuroscience of Mental Disorders Washington University School of Medicine Department of Psychiatry, Box 8134 660 South Euclid Ave. Tel: 314-747-6173 St. Louis, MO 63110 Email: mharms@wustl.edu
From: <freesurfer-bounces@nmr.mgh.harvard.edumailto:freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of "Fotiadis, Panagiotis" <PFOTIADIS@mgh.harvard.edumailto:PFOTIADIS@mgh.harvard.edu> Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edumailto:freesurfer@nmr.mgh.harvard.edu> Date: Friday, January 27, 2017 at 12:30 PM To: "freesurfer@nmr.mgh.harvard.edumailto:freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edumailto:freesurfer@nmr.mgh.harvard.edu> Subject: [Freesurfer] Ghosting Artifact
Hello,
I have a T1 weighted scan with a semi-severe ghosting artifact, and recon-all is not able to complete the reconstruction process (according to recon-all log, it tries to fix 237 defects and at defect 209 the recon stops). Is there anything that I can do to recover the scan so I can reconstruct it successfully? (I have attached a few pics indicating the artifact).
Thanks in advance for your time!
Best, Panos
Panagiotis Fotiadis Research Technologist II J. P. Kistler Stroke Research Center Massachusetts General Hospital 175 Cambridge Street, Suite 300 Boston, MA, 02114 T: (617) 643-3869
________________________________ The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail.
is there also pathology in one of the hemis? It may not be recoverable as Mike says, but if you want to try you need to look at the ?h.inflated.nofix and ?h.orig.nofix and figure out what that defect # corresponds to and how to fix it (you can overlay the ?h.defect_labels file to find out where it is)
cheers Bruce
On Fri, 27 Jan 2017, Harms, Michael wrote:
That subjects looks like a candidate for exclusion, because the SNR anteriorly is much less than posteriorly. It looks to me like there is either a problem with your head coil, or the anterior coil elements were not active.
cheers, -MH
-- Michael Harms, Ph.D.
Conte Center for the Neuroscience of Mental Disorders Washington University School of Medicine Department of Psychiatry, Box 8134 660 South Euclid Ave. Tel: 314-747-6173 St. Louis, MO 63110 Email: mharms@wustl.edu
From: freesurfer-bounces@nmr.mgh.harvard.edu on behalf of "Fotiadis, Panagiotis" PFOTIADIS@mgh.harvard.edu Reply-To: Freesurfer support list freesurfer@nmr.mgh.harvard.edu Date: Friday, January 27, 2017 at 12:30 PM To: "freesurfer@nmr.mgh.harvard.edu" freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] Ghosting Artifact
Hello,
I have a T1 weighted scan with a semi-severe ghosting artifact, and recon-all is not able to complete the reconstruction process (according to recon-all log, it tries to fix 237 defects and at defect 209 the recon stops). Is there anything that I can do to recover the scan so I can reconstruct it successfully? (I have attached a few pics indicating the artifact).
Thanks in advance for your time!
Best, Panos Panagiotis Fotiadis Research Technologist II J. P. Kistler Stroke Research Center Massachusetts General Hospital 175 Cambridge Street, Suite 300 Boston, MA, 02114 T: (617) 643-3869
The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail.
freesurfer@nmr.mgh.harvard.edu
-
Bruce Fischl -
Harms, Michael