Where Should the Superior Edge of the IR/collimated Field Be $1 / 2$

question 22

Multiple Choice

Where should the superior edge of the IR/collimated field be placed for an AP projection of the thoracic vertebrae?

• A) 1 inch above the shoulders
• B) 1 \(1 / 2\) to 2 inches above the shoulders
• C) 1 \(1 / 2\) to 2 inches below the shoulders
• D) At the level of the shoulders