Thanks Doug. Is the same true of Freeview? And is it just coincidence that I haven't seen this with the 12-channel coil?
Andy On Sep 10, 2012 5:16 PM, "Douglas N Greve" greve@nmr.mgh.harvard.edu wrote:
This is just a display issue in tkmedit. tkmedit does not display an image slice. Instead, it reslices the image so that the slices are aligned with the scanner coordinates. This can lead to the lines you see. They are nothing to worry about. doug
On 09/10/2012 10:54 AM, Andrew R. Dykstra wrote:
Hi all,
I've sometimes noticed a strange reslicing artifact with MPRAGE data collected from a Tim Trio using the 32-channel coil. The volume looks normal in Freeview before applying the RAS resampling, and I've never noticed it with data collected using the 12-channel coil. Has anyone else seen this?
Thanks, Andy
-- Andrew R. Dykstra, PhD Auditory Cognition Lab Neurologie und Poliklinik Universitätsklinikum Heidelberg Im Neuenheimer Feld 400 69120 Heidelberg
"How small the cosmos. How paltry and puny compared to human consciousness . . . to a single individual recollection." - Vladimir Nabokov
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I think it is true for FreeView, but Ruopeng would know for sure. As for the 12 channel, it might be that the data are acquired differently (slightly oblique to the scanner coordinates). doug
On 09/10/2012 11:32 AM, Andrew R. Dykstra wrote:
Thanks Doug. Is the same true of Freeview? And is it just coincidence that I haven't seen this with the 12-channel coil?
Andy
On Sep 10, 2012 5:16 PM, "Douglas N Greve" <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> wrote:
This is just a display issue in tkmedit. tkmedit does not display an image slice. Instead, it reslices the image so that the slices are aligned with the scanner coordinates. This can lead to the lines you see. They are nothing to worry about. doug On 09/10/2012 10:54 AM, Andrew R. Dykstra wrote: > Hi all, > > I've sometimes noticed a strange reslicing artifact with MPRAGE data > collected from a Tim Trio using the 32-channel coil. The volume looks > normal in Freeview before applying the RAS resampling, and I've never > noticed it with data collected using the 12-channel coil. Has anyone > else seen this? > > Thanks, > Andy > > -- > Andrew R. Dykstra, PhD > Auditory Cognition Lab > Neurologie und Poliklinik > Universitätsklinikum Heidelberg > Im Neuenheimer Feld 400 > 69120 Heidelberg > > "How small the cosmos. How paltry and puny compared to human > consciousness . . . to a single individual recollection." - Vladimir > Nabokov > > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center greve@nmr.mgh.harvard.edu <mailto:greve@nmr.mgh.harvard.edu> Phone Number: 617-724-2358 <tel:617-724-2358> Fax: 617-726-7422 <tel:617-726-7422> Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu <mailto: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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