| first : after performing the "realignement"(using 2 PET heart volumes) ,
| when I want to "check registration" changing the order of the images
| involves a change their positions. Why?
The positions of the images are shown relative to that of the first one
selected, which is shown in the orientation with which it was acquired.
| second: which can be the calitative factor to estimate the registration?
Sorry, but I don't think I understand the question.
Best regards,
-John
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