Thanks a lot, for your help. This is working fine by now !
Regards Cyrille Quoting David Van Essen <[EMAIL PROTECTED]>: > Dr. Giffard, > > Adding to what Donna just wrote, you may want to take advantage of > the > Surface: Surface Region of Interest options. For the question you > asked, you can select Region of Interest: Node Selection: Node with > Paint, then choose as Category: the paint column containing the > different lobes. Selecting the lobe of interest and pressing the > 'select nodes' button will highlight these nodes in green. > > Then you can use any of the Operate on Selected Nodes options to > carry > out various analyses. For your purpose, you'll probably want the > 'Statistical report on selected nodes'. Then use the 'Attributes' > tab > to decide which of the loaded paint, metric, and surface shape > columns > you want to have analyzed. If you have a surface shape column that > includes a distortion map, you can compute the average distortion > (more > precisely, log2 of the distortion) for the selected region. > > Alternatively, you can use 'Operation Surface and Topology' to select > > the fiducial surface on one round, then a flat map for another round > > and get the surface area of the selected region on each > configuration. > > If you come up with other analysis options that are not currently > available in Caret, we are receptive to suggestions that would be > useful to multiple investigators. > > David Van Essen > > > On Jul 13, 2005, at 9:13 AM, Donna Hanlon wrote: > > > Sorry -- I should have mentioned that you can save the resulting > > surface_shape file in ASCII form, and the corresponding columns > will > > include a scalar value for each node. After stripping the header, > you > > can import this file into an external application for statistical > > processing, if desired. Note also that Caret includes several > useful > > utilities (e.g., mathematical operations) under the Attributes: > > Surface Shape menu. > > > > On 07/13/2005 09:09 AM, Donna Hanlon wrote: > > > >> Hi Dr. Giffard, > >> > >> Make sure you have the "source" surface (e.g., flat or inflated) > >> loaded in the main Caret window. Make sure the "reference" (e.g., > > >> fiducial surface) is loaded; it need not be opened in a window. > >> > >> Then, so Surface: Measurements: Generate Distortion. Select OK. > > >> Then, use D/C: Overlay/Underlay - Surface and make sure Shape is > the > >> underlay (and that no overlays are completely obscuring the > >> underlay). Select Areal or Linear distortion from the Shape > >> drop-down menu. > >> > >> Hope this helps, > >> > >> Donna > >> > >> On 07/13/2005 08:10 AM, Cyrille Giffard wrote: > >> > >>> Dear all, > >>> > >>> I am new user of caret and I was wondering how I can get a report > of > >>> the > >>> areal and linear distortions for a determined area (occipital > lobe, > >>> temporal lobe ...). > >>> I can obtain a shape displaying these informations but I am > >>> unsuccessull > >>> to get any values for nodes. > >>> > >>> Thanks in advance for your help > >>> > >>> Regards > >>> > >>> Cyrille Giffard > >>> > >>> Faculteit der Geneeskunde > >>> Laboratorium voor Neuro- en Psychofysiologie > >>> Campus Gasthuisberg > >>> Herestraat 49, B. 801, B-3000 LEUVEN (Belgium) > >>> Tel. +32 (0) 16 34 59 62 > >>> _______________________________________________ > >>> caret-users mailing list > >>> caret-users@brainvis.wustl.edu > >>> http://pulvinar.wustl.edu/mailman/listinfo/caret-users > >>> > >>> > >> > >> _______________________________________________ > >> caret-users mailing list > >> caret-users@brainvis.wustl.edu > >> http://pulvinar.wustl.edu/mailman/listinfo/caret-users > >> > > > > _______________________________________________ > > caret-users mailing list > > caret-users@brainvis.wustl.edu > > http://pulvinar.wustl.edu/mailman/listinfo/caret-users > > _______________________________________________ > caret-users mailing list > caret-users@brainvis.wustl.edu > http://pulvinar.wustl.edu/mailman/listinfo/caret-users > > Cyrille Giffard Faculteit der Geneeskunde Laboratorium voor Neuro- en Psychofysiologie Campus Gasthuisberg Herestraat 49, B. 801, B-3000 LEUVEN (Belgium) Tel. +32 (0) 16 34 59 62
