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Fig. 3B —22-year-old man with right shoulder pain. Axial CT image at level of rotator interval with paper clips still in place shows that scout image distorts location of desired skin entry position determined from A. Axial CT image should be used instead of CT scout image to guide initial needle placement between limbs of medial paper clip (dotted line)—not medial edge of lateral paper clip as suggested by scout image in A.