[IGSTK-Users] Some questions on IGSTK orientation and Views

[Vincent Gratsac]

Torleif Sandnes wrote:
> Hi Vincent.
>
>> - I wrote a volume reader specific to a file format that we use. The 
>> volume is well parsed and the corresponding SpatialObject is created. 
>> My "problem" appears when I want to display it and add it to 2D Views.
>> The ObjectRepresentation is displayed in the view, but not with the 
>> orientation specified to the View ( Axial, Sagittal, Coronal ). So I 
>> found that IGSTK requires volumes to be described in a specific 
>> orientation in order to be well displayed.
> If I understand you correctly, you set the orientation in both the 
> view and the imagespatialobjectrepresentation?
>
> Something like this:
> theView->RequestSetOrientation(AXIAL);
> theRepresentation->RequestSetOrientation(AXIAL);
> And then you don't get the orientation you expected?

That's it. I think that this is due to the fact that ImageSpatialObject 
has to be oriented in a fixed orientation. Otherwise, IGSTK would not 
know what is the axial, sagittal or coronal plane.
I think that the fixed orientation is "RAI" but I didn't find anything 
to confirm this...

>
>> The orientation I found is "RAI" (1st axis : Right to Left, 2nd axis 
>> : Anterior to Posterior, 3rd axis : Inferior to Superior). Is this 
>> right ? Does this requirement correspond to a "standard" ?
>
> I don't know whether this is a standard or not. I think it may vary 
> according to surgical procedure.
> See also:
> http://public.kitware.com/pipermail/igstk-developers/2007-August/001509.html 
>
>
>> - The second thing I would like to discuss is the igstk::CrossHairs2D 
>> object that I found in IGSTK Sandbox. I don't know if this class is 
>> under development, but I really don't know how to use it, and how to 
>> add it to a View. Could someone give me some clues ?
>
> The crosshairs object should be removed from the sandbox. It was an 
> attempt to add a crosshair to the igstk 2d view in the overlay plane. 
> It will not be further developed, and I don't think you should use it.
Thank you for your advice.
>
> Regards
>
> Torleif Sandnes

-- 
Vincent Gratsac
----------------------------------------------------
Unité/Projet VisAGeS U746
INSERM/INRIA/CNRS/U. de Rennes I
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