35% sounds high to me. Did you actually check the registration You can always load the the fMRI as an overlay in freeview, try tksurferfv subject lh inflated -ov fmri-sampled-on-lh.mgz Also, please include command lines you used
On 11/21/19 10:03 AM, An wrote: > > External Email - Use Caution > > Hi there, > > I want to map the intensities of the fMRI 4D volumes onto its surface > in order to get the functional values on each vertex in each frame. > > I have done the following steps for achieving this: > 1. ran recon-all on its anatomical volume. > 2. register the fMRI series with the anatomical volume by using > bbregister. > 3. assign values from volumes to each surface vertex through the > command mri_vol2surf. > > I have got a result of mapping the 4D volumes intensities onto its > surfaces but there are 35.5% vertices assigned 0 value in every time > frame. > > I am wondering is the ratio reasonable and how could I improve the > result? I guess resolution would be one of reasons causing the high 0 > value ratio, my fMRI data is 2mm^3 and anatomical data is 1mm^3. > > Many thanks for your help. > > Best, > An > > _______________________________________________ > 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
