For an AP axial chest projection (lordotic position),
1. the shoulders are positioned at equal distances from the IR.
2. the patient's back is arched until the midcoronal plane and IR form a 45-degree angle.
3. a 15-degree cephalad central ray angulation is used if the patient is standing erect.
4. the elbows and shoulders are rotated anteriorly.
a. 1 and 2 only
b. 2 and 3 only
c. 1, 2, and 4 only
d. 1, 2, 3, and 4
C
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