<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><DIV>Hi,</DIV>
<DIV> I will try my best to describe my problem clearly.</DIV>
<DIV> </DIV>
<DIV> Now I research the multimodal image registration of liver. I want to do it using coarse-fine ways. first global registration and then local registration.</DIV>
<DIV> when global registration, I use Principal axis algorithm.</DIV>
<DIV> when local registration, I want to use B-spline free form deformations. in ITK, I find an example about B-spline deformations, </DIV>
<DIV> what's the difference of B-spline free form deformations and B-spline deformations?what's more, when I use B-spline FFD , how I could find the corresponding control points between fix image and moving image?</DIV>
<DIV> </DIV>
<P>( my image is 2D)</P>
<P>thanks</P>
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