A correctly positioned lateral chest radiograph demonstrates some separation of the posterior ribs owing to the divergent x-ray beam.But a separation of greater than ____ cm indicates objectionable rotation from a true lateral.

Question

Quizplus · Accepted Answer

A separation of greater than 1 cm indicates objectionable rotation from a true lateral in a chest radiograph. This is because a correctly positioned lateral chest X-ray should show some separation of the posterior ribs due to the divergent nature of the X-ray beam, but excessive separation suggests improper positioning.

A Correctly Positioned Lateral Chest Radiograph Demonstrates Some Separation of the Posterior