[Insight-users] undervalue of registered CT Intensity

[sere f]

Hi All,


I have performed some deformable registrations of the brain with BSpline and
Mattes Mutual Information.

The moving image is a CT and the fixed is MRI.


What i have found is that independently on the goodness of the registration,
the bone tissue of the registered CT  is always underestimated in HU (more
than 10%) and the soft tissue is lightly overestimated in HU (around 4-5%).

Did anybody find my same result? what is the reason?


Thanks for any ideas.


Serena.
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