I have run the longitudinal stream on the scans I need, but now I am not sure what to use to compare the differences. If someone could clarify this for me I would really appreciate it.
Thanks
Hi Brian,
after the longitudinal runs are through you have directories tpN.long.base for each timepoint per subject. These contain the same structure as the cross sectionally processed results, however the values (e.g. thickness, volume etc. in the stat files) should be more accurate.
You can compare these results between timepoints in the same way you would do that without the longitudinal stream. You just need to take the more accurate information in the .long. directories instead.
Best, Martin
On Tue, 2009-09-29 at 14:59 -0400, Weisinger, Brian (NIH/OD) [E] wrote:
I have run the longitudinal stream on the scans I need, but now I am not sure what to use to compare the differences. If someone could clarify this for me I would really appreciate it.
Thanks
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
So if the stats file in the tpN.long.base is empty then something went wrong when I ran the longitudinal stream? I checked the stats file and nothing was in there.
On 9/30/09 2:49 PM, "Martin Reuter" mreuter@nmr.mgh.harvard.edu wrote:
Hi Brian,
after the longitudinal runs are through you have directories tpN.long.base for each timepoint per subject. These contain the same structure as the cross sectionally processed results, however the values (e.g. thickness, volume etc. in the stat files) should be more accurate.
You can compare these results between timepoints in the same way you would do that without the longitudinal stream. You just need to take the more accurate information in the .long. directories instead.
Best, Martin
On Tue, 2009-09-29 at 14:59 -0400, Weisinger, Brian (NIH/OD) [E] wrote:
I have run the longitudinal stream on the scans I need, but now I am not sure what to use to compare the differences. If someone could clarify this for me I would really appreciate it.
Thanks
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Yes,
you should for example have a file in tpN.long.base/stats/aseg.stats with the volume information. If those are not there, something went wrong. Take a look at *.long.*/scripts/recon-all.log.
Martin
On Thu, 2009-10-01 at 09:13 -0400, Weisinger, Brian (NIH/OD) [E] wrote:
So if the stats file in the tpN.long.base is empty then something went wrong when I ran the longitudinal stream? I checked the stats file and nothing was in there.
On 9/30/09 2:49 PM, "Martin Reuter" mreuter@nmr.mgh.harvard.edu wrote:
Hi Brian,
after the longitudinal runs are through you have directories tpN.long.base for each timepoint per subject. These contain the same structure as the cross sectionally processed results, however the values (e.g. thickness, volume etc. in the stat files) should be more accurate.
You can compare these results between timepoints in the same way you would do that without the longitudinal stream. You just need to take the more accurate information in the .long. directories instead.
Best, Martin
On Tue, 2009-09-29 at 14:59 -0400, Weisinger, Brian (NIH/OD) [E] wrote:
I have run the longitudinal stream on the scans I need, but now I am not sure what to use to compare the differences. If someone could clarify this for me I would really appreciate it.
Thanks
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
-
Martin Reuter -
Weisinger, Brian (NIH/OD) [E]