The optimal imagine sytem for PanoramicETMJECephalometric Radiography. Three light beam positioning assures that the patient's mid-sagittal, Frankfort, and focal-trough planes will be aligned for quality, diagnostic images. The rotational speed adjusts to reduce the shadow effect on the film of the cervical vertebrae. The metal cassette provides maximum film-screen contact for producing x-ray films with excellent detail, definition, contrast, and clarity.