<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Hello,</div><div><br></div><div>I am trying to use demons registration for my work. But the problem is, I want to keep some part of the data as fixed, and register other parts. I tried the "itkDiffeomorphicDemonsRegistrationWithMaskFilter", but that is not what I want. What I hope to get is a deformation field in which the fixed part that I want is the same as before the registration. <br></div><div><br></div><div>Is there any filter can do this? Thanks in advance. <br></div><div><br></div><div>Regards. </div></div></body></html>