What type of "holding breath" instructions should be given for an AP projection (patient supine) of the ribs located above the diaphragm?

Question

Quizplus · Accepted Answer

Exposing upon inspiration is correct for imaging ribs located above the diaphragm because it allows the diaphragm to move downward and the lungs to expand, providing a clearer view of the ribcage without the interference of overlying diaphragmatic tissue.

What Type of "Holding Breath" Instructions Should Be Given for an AP