yes On Thu, 12 Apr 2012, Johnson wrote:
The vector coordinates will be in the voxel space
On 04/12/2012 11:54 AM, Bruce Fischl wrote:
Hi Johnson
it depends whether you are using the ras2vox or vox2ras. It should be:
V_rawavg = M_ras2vox_rawavg * inv(M_ras2vox_aseg) * V_aseg
Where the V_* are 4x1 homogenous vectors.
cheers Bruce
On Thu, 12 Apr 2012, Johnson wrote:
so to be clear about it, suppose T1 is the matrix in aseg and T2 is the one in rawavg, to transform from aseg to rawavg I will apply invert(T1)*T2 is that correct?
On 4/11/2012 8:12 PM, Bruce Fischl wrote:
Invert one and compose it with the other
On Apr 11, 2012, at 7:48 PM, Johnsonjgadel2@uic.edu wrote:
there are two transformation matrices one in aseg and one in rawavg, how do I use them ?
On 04/11/2012 6:12 PM, Bruce Fischl wrote: > yes > On Wed, 11 Apr 2012, Johnson wrote: > >> great, so if I can read the header from the aseg file and the header >> from the >> rawavg header file I would be able to transfer any point from the >> aseg >> space >> to the rawavg space is that correct ? >> >> On 04/11/2012 4:40 PM, Bruce Fischl wrote: >>> it registers them based on the header information, but since the >>> aseg >>> is >>> derived from the rawavg that should be exactly correct >>> >>> >>> On Wed, 11 Apr 2012, Johnson wrote: >>> >>>> And it exactly does that, does it register them together or use a >>>> pre-known >>>> transformation matrix >>>> On 04/11/2012 3:46 PM, Bruce Fischl wrote: >>>>> Hi Johnson >>>>> >>>>> I believe it resamples the aseg to have the same geometry as the >>>>> original >>>>> scan. >>>>> >>>>> cheers >>>>> Bruce >>>>> On Wed, 11 Apr 2012, Johnson wrote: >>>>> >>>>>> Hi >>>>>> Can someone tell me please in details what does this line do? >>>>>> mri_label2vol --seg aseg.mgz --temp rawavg.mgz --o >>>>>> aseg-in-rawavg.mgz >>>>>> --reg >>>>>> header aseg.mgz >>>>>> thanks >>>>>> >>>>>> >>>>> The information in this e-mail is intended only for the person to >>>>> whom it >>>>> is >>>>> addressed. If you believe this e-mail was sent to you in error and >>>>> the >>>>> e-mail >>>>> contains patient information, please contact the Partners >>>>> Compliance >>>>> HelpLine at >>>>> http://www.partners.org/complianceline . If the e-mail was sent to >>>>> you in >>>>> error >>>>> but does not contain patient information, please contact the >>>>> sender >>>>> and >>>>> properly >>>>> dispose of the e-mail. >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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Johnson J. GadElkarim Research Assistant, Department Of Psychiatry, PhD Candidate, Department Of Electrical& Computer Eng., University Of Illinois at Chicago Mob: 312 - 376 - 7322 Email: jgadel2@uic.edu
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