[Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing

Hi FreeSurfers, I ran the longitudinal processing pipeline on my subjects, FS 5.0. Following the tutorial, first independently, then base, then long etc. Everything works well, no problems there. Out of curiosity I compared the asegstats & aparcstats within subject at baseline (i.e. The same t

Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing

Hi Cedric, this is as expected, the data changes when using the longitudinal stream (it will become more reliable, removing some of the variance you get in the independent processing). Becuase of the different processing approaches, the results from independent processing (cross) and long wil

Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing

oolsch...@uva.nl>> Cc: "freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu>" mailto:freesurfer@nmr.mgh.harvard.edu>> Subject: Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing Hi Cedric, this is

Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing

This raises an interesting question. Given that the longitudinal process is more reliable, if we collect 2 scans on the same day, should we average those scans and then submit to Freesurfer or apply Freesurfer first and then create an average of the metrics from the longitudinal pipeline? Best Re

Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing

You should take the better of the two images (the one without motion artifacts). Cheers, Martin On 06/26/2013 11:06 AM, MCLAREN, Donald wrote: This raises an interesting question. Given that the longitudinal process is more reliable, if we collect 2 scans on the same day, should we average

Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing

>" mailto:freesurfer@nmr.mgh.harvard.edu>> Subject: Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing Hi Cedric, this is as expected, the data changes when using the longitudinal stream (it will become more reliable, re

Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing

Subject: Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing Hi Cedric, this is as expected, the data changes when using the longitudinal stream (it will become more reliable, removing some of the variance you get

Re: [Freesurfer] Differences on baseline volumes within subject cross-sectional vs longitudinal processing

ependent and > longitudinal are in a linear fashion. > > Any thoughts on this? > > Cheers, > Cédric > > > > > From: Martin Reuter > Date: Tuesday, June 25, 2013 8:00 PM > To: Cédric Koolschijn > Cc: "freesurfer@nmr.mgh.harvard.edu" > Sub