The principles of the paralleling technique include each of the following EXCEPT one. Which one is the EXCEPTION?
A) The image receptor is placed parallel to the long axis of the tooth of interest.
B) The central ray of the x-ray beam is directed perpendicular to the tooth and to the image receptor.
C) The central ray of the x-ray beam is directed at a plane halfway between the long axis of the tooth and the long axis of the image receptor.
D) Parallel placement of the image receptor is accomplished using an image receptor holder.

Question

Quizplus · Accepted Answer

The paralleling technique involves placing the image receptor parallel to the long axis of the tooth and using a holder to ensure parallelism. The central ray of the x-ray beam is directed perpendicular to both the tooth and the image receptor, which creates a predictable image with minimal distortion. The exception is choice C, which suggests directing the central ray at a plane halfway between the tooth and the image receptor. This is not part of the paralleling technique, but rather a different approach known as the bisecting angle technique.

The Principles of the Paralleling Technique Include Each of the Following