Solved

Where Is the Central Ray (CR) Centered for an AP

Question 45

Multiple Choice

Where is the central ray (CR) centered for an AP projection of the lumbar spine with a 14- × 17-inch (35- × 43-cm) IR?

A) At the iliac crest
B) At the ASIS
C) 1 to 1.5 inches (2.5 to 3 cm) above the iliac crest
D) At the lower costal margin

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