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, Johnson<jgad...@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 >>>>>>> >>>>>> -- >>>>>> 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: jgad...@uic.edu >>>>>> >>>>>> >>>>> _______________________________________________ >>>>> 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 >>>> >>> >>> >> _______________________________________________ >> 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
