Radiographic TechniqueQuestion 31 of 100
Which description matches the paralleling technique for intraoral radiography?
a.The receptor rests against the tooth and the beam is aimed at an imaginary bisector
b.The receptor is placed parallel to the long axis of the tooth and the central ray is directed perpendicular to both
c.The receptor is held by the patient's finger at a 45-degree angle
d.The receptor is placed outside the cheek and the beam passes through the face
Explanation
In the paralleling technique a holding device positions the receptor parallel to the long axis of the tooth, and the central ray is directed perpendicular to both, which minimizes dimensional distortion. Aiming at an imaginary bisector describes the bisecting technique. Finger holding is discouraged because it causes movement and unnecessary exposure, and placing the receptor outside the cheek describes extraoral imaging.
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