The Posterior PA x-ray position is oriented in which direction?

The Posterior PA x-ray position is oriented in which direction?

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

Answer: (A)

In a posterior PA projection, the X-ray beam travels from the back of the patient toward the front. When you position the image receptor in front of the patient for a chest or similar radiograph, the beam passes horizontally across the body from posterior to anterior. That perpendicular cross-wise travel to the body’s front, in this common upright setup, is described as a horizontal orientation. The other directions don’t match how the beam moves in this standard setup: vertical would imply an up‑and‑down beam path along the body’s axis, diagonal is an angled path, and circular isn’t a typical projection in conventional radiography.

In a posterior PA projection, the X-ray beam travels from the back of the patient toward the front. When you position the image receptor in front of the patient for a chest or similar radiograph, the beam passes horizontally across the body from posterior to anterior. That perpendicular cross-wise travel to the body’s front, in this common upright setup, is described as a horizontal orientation. The other directions don’t match how the beam moves in this standard setup: vertical would imply an up‑and‑down beam path along the body’s axis, diagonal is an angled path, and circular isn’t a typical projection in conventional radiography.