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Dear FreeSurfer Team,
I'm currently a PhD student at Stevens Institute of Technology in New Jersey, USA, where my research focuses on MRI to PET translation. I have a number of problems. Freeview opens fine but when I load a column in it just shows a black view. Have you ever encountered this problem? 
I'm so confused about using the tool for registration. Can I do registration between MRI and PET modalities of the same subject using "bbregister"?
Best,
Mahdi