Registration Diffusion/anatomy - ROI

Questions about BrainVisa usage and installation

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denghien
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Registration Diffusion/anatomy - ROI

Postby denghien » Wed Mar 28, 2007 2:59 pm

Hi,

This message is the continuation of http://brainvisa.info/forum/viewtopic.php?t=674
because subjects/authors are not the same.


If I understand what you did :
-> Registration Mutual Information Method: there are 2 possibilities regarding the ref and the test.
I suppose that ref = anatomie and test = diffusion.
You have ref_to_test.trm (or anatomie_to_diffusion) and test_to_ref.trm (or diffusion_to_anatomie).

-> Resampling: you want to draw in the referential of diffusion so you must resample anatomie with ref_to_test.trm and you obtain a new volume called resample_anatomie.ima for example.

-> Now you can draw (with the Anatomist ROI toolbox) on resample_anatomie.ima to have an anatomical ROI in the referential of diffusion. Normally, you can do a fusion between the ROI and the diffusion in the same anatomist referential (color dot).

To review how to handle referential in Anatomist, please see "The french manual of Anatomist":
http://brainvisa.info/doc/anatomist-3.0 ... /index.htm


WARNING: it isn't obvious but there are distorsions between anatomy and diffusion modalities (but it is very variable depending on the quality of sequences and scanner). So handle with care ....

Isa

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