Sufficient penetration has been obtained on a PA chest projection when the _____ and posterior ribs are demonstrated through the heart and mediastinal structures.
A) fluid levels
B) vascular lung markings
C) thoracic vertebrae
D) aorta

Question

Quizplus · Accepted Answer

Sufficient penetration on a PA chest projection is indicated when the thoracic vertebrae are visible through the heart and mediastinal structures, demonstrating adequate x-ray penetration through these dense areas.

Sufficient Penetration Has Been Obtained on a PA Chest Projection