Where is the central ray directed for an AP projection of the knee?
A) $1 / 2$ inch above the patellar base
B) $1 / 2$ inch above the patellar apex
C) $1 / 2$ inch below the patellar base
D) $1 / 2$ inch below the patellar apex

Question

Quizplus · Accepted Answer

For an AP projection of the knee, the central ray is directed $1 / 2$ inch below the patellar apex to properly visualize the joint space and surrounding structures.

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