Re: [Freesurfer] Using averaged T1-images to calculate cortical thickness

2022-08-11 Thread Trolle, Carl
Hi, yes that’s correct, one of the sites gets us both axial and sagittal T1s at 1mm isotropic. Ok, after some discussion I think we’ll move along without using averaged images. Thank you for taking your time! Kind regards, Carl ___ Freesurfer maili

Re: [Freesurfer] Using averaged T1-images to calculate cortical thickness

2022-08-09 Thread Douglas N. Greve
If I understand correctly, you have one site that acquires two scans, one sag and one axial, and you want to register them together and compute the average, then feed the average to recon-all? Do they have the same isotropic resolution? I'd guess that this would create a systematic artifact.

[Freesurfer] Using averaged T1-images to calculate cortical thickness

2022-08-03 Thread Trolle, Carl
Hello dear FreeSurfer team, We are undertaking a multicenter study analyzing cortical thickness of controls and persons with a neurological condition. Unfortunately, there are issues with motion artifacts and image quality. To counter this, we’ve created averaged T1-images by combining one axi