Using the beam divergence rule, if the routine lateral lumbar view is centered at the level of the iliac crest/L4-5 and the resultant image demonstrates the joint space of L5-S1 open, how much angle should be applied for the lateral L5-S1 projection? (Assuming L5-S1 lies about 2 inches below crest.)
A. 2
B. 4
C. 6
D. 8
Answer: B
Health Professions
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