I’m working on a project about registration of MR and CT images of pelvis. The only module that works for me without providing initial manual transformation is Expert Automated module which registers when the CT is the fixed Volume and MR is the moving. When I put MR as the fixed volume not only I don’t get an alignment but also the field of view changes. I’m attaching the result of both. I need to know what is the reason and how do I know which parameters and in which way should I change them to improve my results? I appreciate any help.