50dent is right, oral radiology today is teaching, research and some consulting... nothing you can really base your practice on.
but...
i think it's tough to say where oral radiology will be in 4 or 5 years. digital radiography is booming and programs like orthocad will become more and more important in treatment plans (especially prostho and ortho cases).
in my last job, i used MRI and CT scans to reconstruct 3D models for neurosurgeries. it was challenging but also very interesting! if you like computers, imaging, and graphic programs like adobe photoshop, you might like the future of oral radiology...
but what do i know? i'm just a predent