1. The film is placed against the side of the patient's face so that the cheek and body of mandible are contacting film.
   
   
2. The x-ray beam is directed posteroanteriorly from the opposite side with the center of the beam entering slightly posteroinferiorly to the angle of the mandible. The center of the x-ray beam is perpendicular to the film in the horizontal plane and is aimed at the mandibular first molar region.

[insert diagram]