Question

Which part of the sternum would you use as a landmark for an AP projection of the chest?

Answer 1

The sternal angle is the key landmark on the sternum used for AP chest projections as it is the site where the second rib attaches, aiding in orientation.

Step-by-step explanation:

For an AP (anteroposterior) projection of the chest, the important landmark on the sternum to use is the sternal angle. This is the junction line between the manubrium and the body of the sternum where the second rib attaches. This location is critical because the first rib is typically obscured by the clavicle, making the sternal angle and the second rib essential for orientation and identification during medical imaging procedures.