If you have good quality anatomical MRI (e.g., human MRI shown on left in http://brainvis.wustl.edu/help/peak_tweaking), then you're probably good to leave error correction turned on, because you'll probably get a good result.
But if your MRI is not great (e.g., monkey MRI shown on right in http://brainvis.wustl.edu/help/peak_tweaking, which is more like what you have), then you are in for some peak tweaking (http://brainvis.wustl.edu/help/peak_tweaking). While peak tweaking, you can leave surface generation turned on, but turn off all error correction. Once you get the peaks right, then turn on error correction. Once you get the handles fixed, then turn off error correction for final Caret/SureFit (e.g., depth/hull generation). Not all users have to deal with the peak tweaking step. Those that do should turn off error correction until peaks are optimized. On 04/06/2010 01:14 PM, Jochen Ditterich wrote: > Somebody recommended to me to do an iterative process of manually > correcting the segmentation volume and surface generation. When doing > this, would you recommend to enable or disable the automatic error > correction? (The segmentation tutorial suggests disabling the automatic > error correction when generating the final surface after manual > correction of the segmentation volume.) > > Thanks, > > Jochen > > On 4/6/2010 11:01 AM, Donna Dierker wrote: > >> Whatever was the latest processed volume is the selected volume in the >> Overlay/Underlay - Volume menu. >> >> It's a good idea to turn off depth generation, etc., until you have a >> final, topologically correct surface. >> >> On 04/06/2010 12:39 PM, Jochen Ditterich wrote: >> >>> Thank you, David! I think what I did wrong was that I probably ended up >>> editing the Cerebral Hull rather than the Segmentation Volume since, >>> apparently, by default the shown volume overlay is the Cerebral Hull and >>> not the Segmentation Volume. Could that be? >>> >>> Best, >>> >>> Jochen >>> >>> On 4/5/2010 8:28 PM, David Van Essen wrote: >>> >>> >>>> Jochen, >>>> >>>> Loading the segmentation volume plus the original MR volume should allow >>>> you to select: >>>> Volume: Segmentation: Edit Voxels. This lets you add missing parts to >>>> your heart's content. >>>> >>>> David >>>> >>>> On Apr 5, 2010, at 4:28 PM, Jochen Ditterich wrote: >>>> >>>> >>>> >>>>> Thank you, Donna! >>>>> .... I am apparently unable >>>>> to add missing parts. Is this possible? If so, is there a special step >>>>> involved other than selecting "Segmentation Volume Post Processing" and >>>>> the manually corrected segmentation volume? >>>>> >>>>> >>>> _______________________________________________ >>>> caret-users mailing list >>>> [email protected] >>>> http://brainvis.wustl.edu/mailman/listinfo/caret-users >>>> >>>> >>> >> _______________________________________________ >> caret-users mailing list >> [email protected] >> http://brainvis.wustl.edu/mailman/listinfo/caret-users >> > > _______________________________________________ caret-users mailing list [email protected] http://brainvis.wustl.edu/mailman/listinfo/caret-users
