A longer 12-inch or 16-inch PID is better suited to the bisecting technique.

Question

Quizplus · Accepted Answer

The bisecting technique in radiography typically uses a shorter PID (position indicating device) because it is designed to aim the x-ray beam perpendicular to the imaginary bisector that is created between the angle of the tooth and the angle of the film or sensor, which often requires a closer positioning to the patient. Longer PIDs are more commonly associated with the paralleling technique, which requires a greater distance to maintain parallelism between the central ray and the film or sensor.

A Longer 12-Inch or 16-Inch PID Is Better Suited to the Bisecting