What do you mean by dilate it?
Katie
On Fri, Jul 1, 2011 at 2:28 PM, Bruce Fischl fischl@nmr.mgh.harvard.eduwrote:
you can draw a boundary between them and also click "up to boundaries" or something like that. Or just click the center and dilate it a few times or some combination of thresholding and dilation. It's quite flexible
cheers Bruce On Fri, 1 Jul 2011, Katie Bettencourt wrote:
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 fischl@nmr.mgh.harvard.edu wrote: Hi Katie,
you can use the custom fill tool in tksurfer for this. Display youractivation 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 BruceOn Fri, 1 Jul 2011, Katie Bettencourt wrote:
I'm trying to draw an ROI by selecting the center of activation for aparticular 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,
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