A lateral sacral projection with accurate positioning demonstrates
1)the long axis of the sacrum aligned with the long axis of the collimated field.
2)near-superimposition of the greater sciatic notches.
3)an open L5-S1 intervertebral disk space.
4)the median sacral crest in profile.
A) 1 and 2 only
B) 1, 2, and 3 only
C) 3 and 4 only
D) 1, 2, 3, and 4

Question

Quizplus · Accepted Answer

1) The long axis of the sacrum aligned with the long axis of the collimated field ensures proper positioning and optimal visualization of the sacrum.
2) Near-superimposition of the greater sciatic notches ensures that the sacrum is not rotated and that both sides of the sacrum are accurately visualized.
3) An open L5-S1 intervertebral disk space confirms that there are no overlapping structures and that the L5-S1 joint is visualized.
4) The median sacral crest in profile provides a clear view of the sacral midline and any abnormalities that may be present. All four of these criteria must be met for an accurate lateral sacral projection.

A Lateral Sacral Projection with Accurate Positioning Demonstrates