Hi Bruce, That's how I normally make my ROIs, but my boss is concerned that we are going from one area to a nearby area that is also activated by this contrast, so she wants to restrict it by a certain number of voxels from the center of activation.
Katie On Fri, Jul 1, 2011 at 1:55 PM, Bruce Fischl <fis...@nmr.mgh.harvard.edu>wrote: > Hi Katie, > > you can use the custom fill tool in tksurfer for this. Display your > activation map at whatever threshold you want, then click in the middle of > the blob you want to create an ROI for and do custom fill with "up to > functional threshold". This will floodfill from that point outwards stopping > when it reaches vertices that are below threshold > > cheers > Bruce > > > > > On Fri, 1 Jul 2011, Katie Bettencourt wrote: > > I'm trying to draw an ROI by selecting the center of activation for a >> particular contrast and then selecting nearby voxels within a certain range >> (for example. say 20 >> voxels). Ideally I'd like to select only the voxels within this range >> that are activated by my contrast. However, I can't see how to do this, any >> help would be >> appreciated. >> Thanks, >> >> Katie >> >> >> > > 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<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. >
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