[IGSTK-Users] image origin question

[Luis Ibanez]

Hi

You *shouldn't* arbitrarily change the origin of an image
that is going to be used for guiding a surgery.

The proper mechanism for aligning two images is through
a registration process. Otherwise, it is very likely that
the arbitrary origin that you provide for the image may
be wrong, and that will cascade in a sequence of errors
that can easily  result in harming a patient.

The service that an image guided surgery application provides
to a surgeon is based on displaying a *consistent* spatial and
temporal description of the surgical scene.

If your application can arbitrary move an image across the
scene, you can in turn, arbitrarily "misguide" the hand of the
surgeon to a wrong location. E.g. instead of inserting a needle
in a tumor, you may mislead a surgeon to insert a needle in
the heart.

IGSTK prevents such catastrophic mistakes by encapsulating
the coordinate system of the surgical scenario and making
sure that objects are displayed at the locations where they
are known to be placed.

IGSTK provides mechanisms for registering images via landmarks,
you can also use the ITK toolkit for performing registration
of images as part of the surgery planning stage.



    Regards,


       Luis


--------------
??? ? wrote:
> Thank you for helping me.
> 
> But, it seems that we have differt point of view about problem.
> luis told me to use the resampling image
> but i want to allign image explicitly using the method such as 
> 'SetOrigin'..(.that sort of method)
> without resampling.
> 
> and Needly Biopsy is using m_ImageReader as follows:
> 
>    m_ImageReader->RequestReadImage();
> 
>    m_ImageReader->RequestGetImage();
>    if(!m_CTImageObserver->GotCTImage())
>     :
> so i couldn't using SetOrigin().
> 
> Also center of view port  is between image object and tracker object.
> i would like to change center of the view port, if possible.
>