Dental Imaging You are here:HomeOur ServicesDental Imaging St Vincent's Private Radiology provides dental imaging in the form of orthopantomograms (OPG) and Lateral Cephalograms. A referral from your dentist or oral surgeon is required for these examinations to be performed. OPG Orthopantomogram or OPG is a panoramic X-ray of the upper and lower jaw. It demonstrates in 2D a panoramic view of the mandible from ear to ear, including wisdom teeth. Orthopantomogram (OPG)