then the ?h.white is probably the way to go On Tue, 25 Jan 2011, Gabriele Arnulfo wrote:
> The electrodes are quite long they're length vary from 10cm up to 15cm > depends on the subject. they usually have been implanted quite deep in the > brain. > > cheers, > > g. > > 2011/1/25 Bruce Fischl <fis...@nmr.mgh.harvard.edu> > >> Hi Gabriele >> >> inflated is definitely wrong as it has no meaning in the MRI coords. Any >> idea how deep the electrodes are? The white might be best as it will >> minimize the chances of erroneously assigning the electrode to the wrong >> bank of a sulcus. >> >> >> cheers >> Bruce >> >> >> On Tue, 25 Jan 2011, Gabriele Arnulfo wrote: >> >> Hi Bruce, >>> >>> I've a list of intra cerebral electrodes channel position segmented out >>> from >>> the MRI scans. I would like to convert the computed positions from the MRI >>> scanner space to freesurfer vertexes. I've already transformed the >>> coordinates of each point from indexes to Cartesian Space values (in the >>> scanner RAS space). I'm looking to find which is the right surface to use >>> the inflated or the pial surface to compute the nearest vertex for each >>> point. >>> >>> Does this short description clarify a little bit more my goal? >>> >>> cheers, >>> >>> g. >>> >>> 2011/1/25 Bruce Fischl <fis...@nmr.mgh.harvard.edu> >>> >>> Hi Gabriele, >>>> >>>> what are you trying to accomplish? The "right choice" depends on your >>>> goals. >>>> >>>> cheers >>>> Bruce >>>> >>>> On Tue, 25 Jan 2011, Gabriele Arnulfo wrote: >>>> >>>> Hi again, >>>> >>>>> >>>>> looking in previous emails in the list i found that the best way to find >>>>> the >>>>> nearest vertex number to a certain point is by using the matlab script >>>>> mesh_vertex_nearest. So far I've used it with input parameters: the >>>>> vertices >>>>> read through read_surf(rh_pial) and a matrix of Cartesian Coordinates. >>>>> In >>>>> this context I'd like to know which surface is the right choice, if >>>>> there >>>>> should be a choice. I've inserted either the pial and inflated surface >>>>> having different result (vertex index) for the same point (RAS xyz). >>>>> >>>>> >>>>> Cheers, >>>>> >>>>> g. >>>>> >>>>> >>>>> >>>>> >>>> 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
