External Email - Use Caution
Thanks Doug, For your kind detailed replies. This is really great help.
- Original Message -
From: "Douglas Greve"
To: "freesurfer"
Sent: Tuesday, August 7, 2018 9:01:01 PM
Subject: Re: [Freesurfer] Origin of freesusrfer
way from this.
>
> Thanks,
> Ritesh Mahajan
>
> Thanks,
> Ritesh Mahajan
>
> - Original Message -
> From: "Douglas N. Greve"
> To: "freesurfer"
> Sent: Monday, August 6, 2018 9:22:29 PM
> Subject: Re: [Freesurfer] Origin of freesusrfer out
: "Douglas N. Greve"
To: "freesurfer"
Sent: Monday, August 6, 2018 9:22:29 PM
Subject: Re: [Freesurfer] Origin of freesusrfer output
also, check out this web page
http://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems
On 08/05/2018 11:23 AM, Bruce Fischl wrote:
> Hi
> Also, can you tell what mathematical formula or equation is used
>> convert this origin ?
>>
>> Thanks,
>> Ritesh Mahajan
>>
>> - Original Message -
>> From: "Douglas Greve"
>> To: "freesurfer"
>> Sent: Friday, Augu
51:30 PM
Subject: Re: [Freesurfer] Origin of freesusrfer output
To add on, the origin is changed in that the "first voxel" is not the
same in the 256^3 volume as it is in the original dicom. Having said
that, all our files (eg, mgz and nifti) have a matrix that converts a
col, row, slic
-
From: "Douglas Greve"
To: "freesurfer"
Sent: Friday, August 3, 2018 9:51:30 PM
Subject: Re: [Freesurfer] Origin of freesusrfer output
To add on, the origin is changed in that the "first voxel" is not the
same in the 256^3 volume as it is in the original dic
To add on, the origin is changed in that the "first voxel" is not the
same in the 256^3 volume as it is in the original dicom. Having said
that, all our files (eg, mgz and nifti) have a matrix that converts a
col, row, slice into the scanner RAS, so you can always find your way
back to the
Hi Ritesh
Doug can correct any inaccuracies, but
1. Yes, unless you tell recon-all not to.
2. I'm not sure what you mean by the origin, but we do keep track of
the ras coordinates of the center of the volume after resampling (the so-called
"cras").
3. We do keep track of the original dicom
External Email - Use Caution
Hi Bruce,
1) Free-surfer output is always 256*256*256, regardless of any input dimensions.
2) I have a doubt, while doing this re-sampling from input dimension to
256*256*256. Does free-surfer change the origin of image?
3) My input is an MRI dicom
