An AP axial (Towne method) cranial projection with poor positioning demonstrates the dorsum sella superior to the foramen magnum. How was the positioning setup mispositioned for such a projection to be obtained?
1. The patient's face was rotated toward the left side.
2. The chin was not adequately tucked.
3. The OML was not aligned perpendicular to the IR.
4. The central ray was angled too caudally.
a. 1 only
b. 4 only
c. 2 and 3 only
d. 2, 3, and 4 only
C
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