Hi Doug, You're right it was the wrong map, and now the angles make sense. But when I look at the correct images, the eccen and polar maps are very, very speckled. So, in the relevant visual areas, there are hardly any 0 values, so I would expect a more contiguous color pattern.
Is there any way to improve the visualization? Here is the command I used: tksurfer-sess -a rtopy.self.lh -s sj17 -map angle Thanks. Michelle Quoting Douglas N Greve <gr...@nmr.mgh.harvard.edu>: > Hi Michelle, I don't think you are looking at the angle. The eccen > angle should go from 0-2pi. The polar angle should go from -pi to +pi. > What is you visualization command-line? You can change the color scale > from the View->Configure->Overlay window. > doug > > Michelle Umali wrote: >> Dear Freesurfers, >> >> In an effort to figure out why my field sign data is a bunch of >> blue/red speckles, I looked at the polar and eccentricity maps >> separately on the surface. >> >> In both maps, I found that the values range from 0 to approximately >> 65. Does that seem to be OK, and if so, what do these numbers >> represent in terms of polar angle or eccentricity? Also, it seems >> that the color ranges in the overlay cannot show any values above >> 4; is there a way to visualize larger ranges (such as 0 to 65)? >> >> Thank you very much. >> Michelle >> >> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> >> >> > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu > Phone Number: 617-724-2358 Fax: 617-726-7422 > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html > > > > 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
