Receptor position in the bisecting-angle technique?

• A. Close to Teeth, Not Parallel
• B. Far from Teeth, Parallel to the Tooth
• C. Parallel to Tooth
• D. Equidistant from Tooth and Receptor

Answer: (A)

In this technique, the receptor is positioned to minimize distortion when it cannot be placed parallel to the tooth. You put the receptor as close to the tooth as possible and you don’t keep it parallel to the tooth. The X-ray beam is aimed so that it bisects the angle formed by the tooth and the receptor, which helps produce a more accurate image despite the angled setup. If the receptor is kept far from the tooth or positioned parallel to it, distortion increases because the geometry no longer relies on the bisected angle. So, the correct idea is to place the receptor close to the teeth and not parallel to them.