Re: [Freesurfer] orig.mgz versus T1.mgz

2018-05-02 Thread Douglas Greve
The orig.mgz is closer to the raw data than T1.mgz, but it will be different in a number of ways. First, it will be 256^3, 1mm voxel size regardless of the dimensions of the raw data. Second, it will be 8 bits (0-255) with some rescaling. On 5/2/18 7:43 AM, C.P.E. Rollins wrote: > Ext

Re: [Freesurfer] orig.mgz versus T1.mgz

2018-05-02 Thread C.P.E. Rollins
External Email - Use Caution Just to clarify, by that I mean would the NIFTI converted from orig.mgz (with mri_convert) be different than the NIFTI produced by dcm2niix from the raw DICOMs? Thanks, Colleen Original Message Subject: orig.mgz versus T1.mgz Date:

[Freesurfer] orig.mgz versus T1.mgz

2018-05-02 Thread C.P.E. Rollins
External Email - Use Caution Thanks Bruce. Will the orig.mgz file be different from the raw data in any significant way? Thanks again, Colleen Original Message Subject: orig.mgz versus T1.mgz Date: 2018-04-30 11:54 From: "C.P.E. Rollins" To: Freesurfer Dear

Re: [Freesurfer] orig.mgz versus T1.mgz

2018-04-30 Thread Bruce Fischl
Hi Colleen it depends on what you want to do. The T1.mgz probably isn't the correct volume to use in any case. The orig.mgz is close to the raw data (e.g. it has a skull in it and has not been bias corrected). If you want a skull-stripped, bias-corrected version you could use either the norm.mg

[Freesurfer] orig.mgz versus T1.mgz

2018-04-30 Thread C.P.E. Rollins
External Email - Use Caution Dear Freesurfer developers, A collaborator shared with me Freesurfer outputs, but I would like to some analyses requiring the scans in NIFTI format. I understand mri_convert should do the trick for this, though I was wondering whether I should use "