Getting the Most Out of Panoramic Radiographic Interpretation

Abstract

As with any other radiographic method, optimum interpretable diagnostic images can only be achieved with careful quality assurance in patient positioning, in selecting appropriate exposure parameters and during processing. While panoramic radiography is easy to perform well if all the manufacturer’s instructions are followed, it is equally easy to perform badly. Most errors are due to incorrect patient positioning, leading to excessive and sometimes disproportionate distortion. A correctly positioned patient’s panoramic radiograph generally shows symmetry of the size of the mandibular rami and condyles, and the dental segments are “in focus” with a gentle downward convexity of the maxillary arch. Provided the patient bites correctly on the bite-block, the anterior structures are portrayed in the midline and the apices of the mandibular incisor teeth should be in full “focus.” Provided that the tongue is kept up in the roof of the mouth during exposure, the roots of the maxillary teeth are clearly demonstrated. It is less expensive in time and materials—and in radiation to the patient—to perfect your panoramic technique, than to make unnecessary repeat exposures.