A Left Lateral Sacral Projection Demonstrates the Greater Sciatic Notches

Multiple Choice

A left lateral sacral projection demonstrates the greater sciatic notches without superimposition and the superiorly situated femoral head anteriorly. How should the positioning setup be adjusted for an optimal projection to be obtained?

A) Rotate the right side of the pelvis anteriorly.
B) Position a radiolucent sponge between the lateral body surface and the imaging table to eliminate lumbar sagging.
C) Angle the central ray caudally.
D) Rotate the right side of the pelvis posteriorly.