Re: [Freesurfer] Fwd: DTI questions
Dear Anastasia, The T1 images were acquired in a sagittal orientation, and the DTI images in an axial orientation. Does this help ? Thanks Rotem 2013/6/25 Anastasia Yendiki ayend...@nmr.mgh.harvard.edu Hi Rotem - No problem. Were these scans by any chance acquired with a coronal slice prescription? In the axial views that you sent, the artifact that you're pointing to looks like misalignment between consecutive coronal slices, which could be due to head motion. a.y On Tue, 25 Jun 2013, Rotem Saar wrote: Dear Anastasia, I tried several times to upload these images in a non-compressed way, but they were too big and my posts were rejected, with no opportunity for any other upload way. Is there any other way for me to upload it so that everyone can see it ? Attached are the images in a non-compressed fashion. I will be very happy if u will have a look, and post your answer to me and the list to save some time, until I will be able to consider another way to upload them. I know that we should write to all the list, but at the moment if the images are not visible this won't help - so I will really appreciate if u will have a look but also tell me what is the best way to upload them so that all list members will be able to see them. Thank u very much for your help. Rotem 2013/6/25 Anastasia Yendiki ayend...@nmr.mgh.harvard.edu Sorry, can't open the image. On Sun, 23 Jun 2013, Rotem Saar wrote: Hi there, Long time:). Well I wrote to the list several times regarding high FA values I got when performing DTI analysis. Today we know that the problem was an additional direction (we had 17 directions instead of 16 - we used a Philips scanner,1.5T). So we deleted the additional slices and the high values indeed disappeared, but then another problem came up (tried several subjects so the problem is not specific to a subject) - I noticed an artifact that I can't explain - please see the attached pictures. This artifact existed even before I deleted the additional slices, also - I see the artifact also when loading the masked volume...It is cyclic - run over all slices... any ideas ? I'm using version 5.2 and I know the command lines are correct (send it to u in the past). Thanks for your help Rotem 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/**compliancelinehttp://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.
Re: [Freesurfer] Fwd: DTI questions
Sorry, can't open the image. On Sun, 23 Jun 2013, Rotem Saar wrote: Hi there, Long time:). Well I wrote to the list several times regarding high FA values I got when performing DTI analysis. Today we know that the problem was an additional direction (we had 17 directions instead of 16 - we used a Philips scanner,1.5T). So we deleted the additional slices and the high values indeed disappeared, but then another problem came up (tried several subjects so the problem is not specific to a subject) - I noticed an artifact that I can't explain - please see the attached pictures. This artifact existed even before I deleted the additional slices, also - I see the artifact also when loading the masked volume...It is cyclic - run over all slices... any ideas ? I'm using version 5.2 and I know the command lines are correct (send it to u in the past). Thanks for your help Rotem ___ 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.
Re: [Freesurfer] Fwd: DTI questions
Hi Rotem - No problem. Were these scans by any chance acquired with a coronal slice prescription? In the axial views that you sent, the artifact that you're pointing to looks like misalignment between consecutive coronal slices, which could be due to head motion. a.y On Tue, 25 Jun 2013, Rotem Saar wrote: Dear Anastasia, I tried several times to upload these images in a non-compressed way, but they were too big and my posts were rejected, with no opportunity for any other upload way. Is there any other way for me to upload it so that everyone can see it ? Attached are the images in a non-compressed fashion. I will be very happy if u will have a look, and post your answer to me and the list to save some time, until I will be able to consider another way to upload them. I know that we should write to all the list, but at the moment if the images are not visible this won't help - so I will really appreciate if u will have a look but also tell me what is the best way to upload them so that all list members will be able to see them. Thank u very much for your help. Rotem 2013/6/25 Anastasia Yendiki ayend...@nmr.mgh.harvard.edu Sorry, can't open the image. On Sun, 23 Jun 2013, Rotem Saar wrote: Hi there, Long time:). Well I wrote to the list several times regarding high FA values I got when performing DTI analysis. Today we know that the problem was an additional direction (we had 17 directions instead of 16 - we used a Philips scanner,1.5T). So we deleted the additional slices and the high values indeed disappeared, but then another problem came up (tried several subjects so the problem is not specific to a subject) - I noticed an artifact that I can't explain - please see the attached pictures. This artifact existed even before I deleted the additional slices, also - I see the artifact also when loading the masked volume...It is cyclic - run over all slices... any ideas ? I'm using version 5.2 and I know the command lines are correct (send it to u in the past). Thanks for your help Rotem 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.
