Heart Penetration on an AP Chest Projection

Multiple Choice

Heart penetration on an AP chest projection
1) is obtained by increasing the kVp.
2) results in a lower contrast image.
3) is required when apparatuses located at the mediastinal region are of interest.
4) results in a decrease in scatter radiation reaching the IR.

A) 1 and 3 only
B) 1, 2, and 3 only
C) 3 only
D) 1, 2, 3, and 4