OMFR has changed in the past years. With the coming of advanced imaging modalities in dentistry, there is an increasing demand for trained oral & maxillofacial radiologists. You can read further about the career at the Academy of Oral and Maxillofacial Radiology website
http://www.aaomr.org/?page=OMRasaCareer
Below is summary quoted from the academy's website
Most OMRs in academic settings provide patients with radiographic services beyond the scope of general dentists and other specialists. Referral of patients for tomographic evaluation of the TMJ or prospective implant sites has become more and more common in intramural radiology practices. CT or MRI post-processing workstations are found at many facilities and allow dental school-based OMRs to deliver even more sophisticated services in TMJ or implant imaging. Dental schools that have graduate programs in periodontics and prosthodontics or that operate orofacial pain centers often provide many patients for the OMR.
Some OMRs, however, establish private practices outside the confines of dental schools. These practitioners provide standard intraoral and panoramic radiography, but also perform TMJ and implant tomography, orthodontic radiographic examinations, and diagnostic consultations. Some OMRs affiliate with radiology practices that offer a wide range of procedures such as nuclear medicine and ultrasound. Some radiologists opt for a home-based privated practice, relying on the technology of the internet to relay patient scans and reports to and from remote locations. With specialty status recently granted by the ADA to oral and maxillofacial radiology, it is likely that increasing numbers of OMRs may elect to practice in the private sector.