[Freesurfer] DOSS Question

2021-07-20 Thread WON JONG CHWA
External Email - Use Caution Dear FreeSurfer Experts, I have been having trouble with performing DOSS analyses with mri_glmfit. One of the groups in my sample is too small to be performed with DODS, but when I try to call the DOSS option in mri_glmfit, it returns the same error,

[Freesurfer] Demeaning for Longitudinal Analyses

2021-06-17 Thread WON JONG CHWA
External Email - Use Caution Dear FreeSurfer experts, I am currently running longitudinal analyses using the paired analysis tutorial for two time points. There are two tests I am trying to run: 1. Calculating significant changes in volume between the two time points,

[Freesurfer] Hippocampal Suubfields Segmentation Violation

2021-03-22 Thread WON JONG CHWA
External Email - Use Caution Dear FreeSurfer experts, I am trying to compute hippocampal subfields with

[Freesurfer] Regressing out gender

2020-09-29 Thread WON JONG CHWA
External Email - Use Caution Hello, I am currently attempting a paired t-test of subjects between two time points, regressing out the effects of age and gender. I am currently running the paired analysis tutorial, and have done the step of computing the differences between pairs

[Freesurfer] Vertex by Vertex Analysis

2019-10-04 Thread WON JONG CHWA
External Email - Use Caution Hello, I would like to perform a group difference analysis with gray-white matter contrast between healthy controls and patients, covarying for the cortical thickness at each vertex throughout the entire brain surface. How would we go about doing

[Freesurfer] Longitudinal Gray/white Contrast Measure

2019-05-06 Thread WON JONG CHWA
External Email - Use Caution Dear FreeSurfer experts, I am currently running a longitudinal analysis in FreeSurfer v5.3 to look at changes in volume and gray/white contrast. I ran all the processing steps and used this command below to look at results for volume:

[Freesurfer] Raw Data for Clusters

2018-10-16 Thread WON JONG CHWA
External Email - Use Caution Dear FreeSurfer Experts, I am running Qdec 1.4 and I want to extract raw data (in this case, volume) from the significant clusters after Monte-Carlo simulation. In this particular case, the summary file shows 5 significant clusters after correction: