On 28 Mar 2017, at 13:46, Dev vasu wrote:

Dear Sir,

You are right, I am trying to view Gyrification maps by clicking "CAT ->
Analyze ROIs"  on CAT12 GUI template and later i specified contrasts
,perhaps this is my mistake . Could you please let me know whether i can
visualize changes in Gyrification between 2 groups after i specify the
contrasts ?,  If so how could i do it . I have performed CAT 12 ->
Statistical analysis and was able to generate SPM.mat file for all
respective Gyrification label files.

after you have build the model:
1. Define contrasts
2. Call results

optionally
3. Analyze ROIs

Don’t mix that order because this will not work.

Best,

Christian

Thanks
Vasudev

On 27 March 2017 at 17:05, Christian Gaser <[log in to unmask]>
wrote:

Dear Vasudev,

the error clearly points to the ROI-analysis:

Error in cat_stat_analyze_ROIs>estimate_GLM (line 387)

The function cat_stat_analyze_ROIs.m will be only called by the button
„ROI analysis“ in the GUI nowhere else.

Best,

Christian

On 27 Mar 2017, at 16:49, Dev vasu wrote:

Dear Sir,

I am not doing ROI analysis at present , this error is occurring when i
tried to compute vertex wise analysis, i could compute cortical thickness ,
but not gyrification.


Thanks
Vasudev

On 27 March 2017 at 16:34, Christian Gaser <[log in to unmask]>
wrote:

Dear Vasudev,

it looks like that you are trying to do the ROI analysis without calling
the results of the vertex-vise analysis before. If you want to use the ROI
analysis you not only have to estimate your model for the vertex-vise data,
but you need to define the respective contrasts in the contrast manager and
you have to call these results before you do the ROI analysis.

I have no other explanation, because the missing field „eidf“ should be
saved if you have done the vertex-vise analysis before and call that
results.

Best,

Christian

On 21 Mar 2017, at 11:53, Dev vasu wrote:

Dear Sir,

I have done that , But i could not display Gyrification maps, i have
asked this question earlier and i posting it  again

"
I am using CAT12 to extract Gyrification index , I have followed CAT 12
manual in order to generate lh and rh.gyrification.name.gii files and
performed smoothing , I have also performed statistical analysis on

"S15mm.lh.gyrification.resampled.name.gii " files and generated SPM.mat
files for both lh and rh.gyrification surfaces. but when i try to define
contrasts and generate gyrification maps , i am incurring following error :
, could some one please let me know thats wrong with my approach.


Reference to non-existent field 'eidf'.

Error in cat_stat_analyze_ROIs>estimate_GLM (line 387)
df   = [SPM.xCon(Ic).eidf SPM.xX.erdf];

Error in cat_stat_analyze_ROIs (line 190)
p = estimate_GLM(Y,X,SPM,Ic);

Error in cat12>pushbutton174_Callback (line 409)
cat_stat_analyze_ROIs;

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in cat12 (line 76)
    gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,even
tdata)cat12('pushbutton174_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating UIControl Callback


Thanks
Vasudev

On 21 March 2017 at 11:07, Christian Gaser <[log in to unmask]>
wrote:

Dear Vasudev,

CAT12-manual page 34:

Extract optional surface parameters
You can also extract additional surface parameters that have to be
resampled and smoothed with the before mentioned tool.
CAT12->Surface Tools->Extract & Map Surface Data->Extract Additional
Surface Parameters Parameters:
o Central Surfaces <-X->Select the central surface data (e.g.
[lr]h.central.*)
o Gyrification index
  - Extract gyrification index (GI) based on absolute mean curvature.
The method is described in Luders et al. NeuroImage, 29: 1224-1230, 2006.
o Cortical complexity (fractal dimension)
  - Extract Cortical complexity (fractal dimension) which is described
in Yotter et al.
Neuroimage, 56(3): 961-973, 2011.
  - Warning: Estimation of cortical complexity is very slow!
o Sulcus depth
  - Extract sqrt-transformed sulcus depth based on the euclidean
distance between the central surface and its convex hull.
  - Transformation with sqrt-function is used to render the data more
normally distributed.

Best,

Christian

On Fri, 17 Mar 2017 09:28:24 +0100, Dev vasu <
vasudevamurthy.devulapally@GMAIL.COM> wrote:

Dear Sir,

I could extract Cortical thickness maps but  when i select Gyrification

, i

could not extract gyrification maps , could you please let me know how i
could extract gyrification Index values in  CAT12.


Thanks
Vasudev