Re: [Freesurfer] Cross sectional analysis of a longitudinal data

2016-03-29 Thread Martin Reuter
Hi Kasper, because that is the way it is designed. Whenever recon-all runs on longitudinal data, it needs to know where the cross and base are (just in case that this info is needed somewhere). So the correct call is the one with the -long telling it that this is a longituidnal run (and not j

Re: [Freesurfer] Cross sectional analysis of a longitudinal data

2016-03-29 Thread Kasper Jessen
Hi Martin, When doing cross-sectional analysis on a longitudinal data set and the qdec table is ordered as followed: fsid Gender Group Age d115a.long.d115_base 1 1 19 d120a.long.d120_base 0 1 22 Why does the presmoothing not have to be: recon-all -s d115a.long.d115_base -qcache recon-all -s d120a

Re: [Freesurfer] Cross sectional analysis of a longitudinal data

2016-03-11 Thread Martin Reuter
Hi Kasper, That needs to be the cross-sectinal name (whenever you also pass a base, it will automatically create the ..long.. names internally). cheers, Martin On 03/11/2016 08:51 AM, Kasper Jessen wrote: Hi Martin, Thanks for the answer :-) To presmooth the data onto target, with the fol

Re: [Freesurfer] Cross sectional analysis of a longitudinal data

2016-03-11 Thread Kasper Jessen
Hi Martin, Thanks for the answer :-) To presmooth the data onto target, with the following command: recon-all -long -qcache The , does that have to be the longitudinal name (d115a.long.d115_base) or the cross-sectional name (d115a)? Best wishes Kasper 2016-03-09 22:38 GMT+01:00 Martin Reute

Re: [Freesurfer] Cross sectional analysis of a longitudinal data

2016-03-09 Thread Martin Reuter
Hi Kasper, short answer: yes. long answer 1. yes 2. yes (you need to create a table in cross sectional format (no fsid-base column) and the fsid needs to be the tp.long.base names for baseline visit. the path should point to where these *.long.* directories are located). 2. yes (fsaverage sh

[Freesurfer] Cross sectional analysis of a longitudinal data

2016-03-09 Thread Kasper Jessen
Dear FreeSurfer experts, We have a longitudinal study design with up to 5 time points. However, we both want to do a baseline cross-sectional analysis and later a longitudinal analysis. All subjects have been run through the longitudinal pipeline (only the base was edited). We want to start analys