Which orientation is associated with the Posterior PA x-ray position?

Which orientation is associated with the Posterior PA x-ray position?

• A. Horizontal
• B. Vertical
• C. Diagonal
• D. Oblique

Answer: (A)

In this context, the direction of the X-ray beam relative to the patient is being tested. Posterior to anterior means the beam enters from the back and exits toward the front. For this view, the beam travels in a horizontal plane from back to front, so the orientation is horizontal. A vertical beam would go top-to-bottom, and an oblique or diagonal path would indicate an angled projection, which describes a different view. Therefore, horizontal is the correct association.

In this context, the direction of the X-ray beam relative to the patient is being tested. Posterior to anterior means the beam enters from the back and exits toward the front. For this view, the beam travels in a horizontal plane from back to front, so the orientation is horizontal. A vertical beam would go top-to-bottom, and an oblique or diagonal path would indicate an angled projection, which describes a different view. Therefore, horizontal is the correct association.