[Freesurfer] NIFTI q-factor in NIFTI header

2013-01-11 Thread Jürgen Hänggi
Dear FS experts Please can you confirm that the NIFTI q-factor in the NIFTI header has to be negative (e.g. -1) in order to have correct right and left orientation. When the NIFTI q-factor is positive in my T1-w. and DTI images, then the left and the right hemisphere seem to be flipped. Thanks i

[Freesurfer] tksurfer - rotate surface with mouse

2013-01-11 Thread jonwie...@netzero.net
Is it possible to rotate the surface model in tksurfer with the mouse instead of the rotation buttons on the GUI. (i.e. grab the surface model with the mouse and spin it) Jon Wieser jonwie...@netzero.com "When the going gets tough, switch to power tools." - Red Green __

Re: [Freesurfer] tksurfer - rotate surface with mouse

2013-01-11 Thread Bruce Fischl
Hi Jon glad to see you are now able to post :>. No, I don't think you can do this in tksurfer due to its age and slow redraw rate. Freeview can do it though. cheers Bruce On Fri, 11 Jan 2013, jonwie...@netzero.net wrote: > > Is it possible to rotate the surface model in tksurfer > with the mo

Re: [Freesurfer] NIFTI q-factor in NIFTI header

2013-01-11 Thread Douglas N Greve
Hi Juergen, how are you judging whether a volume is flipped or not? The freesurfer tools should display properly regardless of the qfactor as long as the qform matrix is correct. doug On 01/11/2013 08:40 AM, Jürgen Hänggi wrote: > NIFTI q-factor Dear FS experts Please can you confirm that the

[Freesurfer] Fw: Re: tksurfer - rotate surface with mouse

2013-01-11 Thread jonwie...@netzero.net
> I tried running freeview and it aborted > > psy-cerebrum-r1:data brainlab$ freeview -f rh.orig > > bus error > we are using a Mac Pro 2.26GHz 8 cores mac Os X 10.6.8 RAM : 12 GB > with X11 and Xquartz > tkmedit works fine > > here's the problem report from our machine > > Proce

Re: [Freesurfer] NIFTI q-factor in NIFTI header

2013-01-11 Thread Jürgen Hänggi
Hi Douglas Thanks for your answer. Our problem is actually not directly related to FS. We converted Philips .par/.rec files with two different converters, one of which was recently updated for a new platform and scanner software release, and realized that they produce different q-form matrices. T