Posteroanterior view refers to the view seen when the central ray is directed from

• A. From Front to Back
• B. From Back to Front
• C. From Right to Left
• D. From Left to Right

Answer: (B)

Posteroanterior means the X-ray beam travels from the back of the body toward the front. In this view, the central ray is directed from posterior to anterior, with the patient typically standing with their chest against the image receptor and the X-ray tube positioned behind them. This orientation helps keep the heart closer to the detector, reducing magnification compared to front-to-back (anteroposterior) views. The other directions describe different views: front-to-back would be an AP view, while right-to-left or left-to-right would be lateral orientations, not PA.