Which position demonstrates the left kidney parallel to the image receptor while keeping the right ureter free of superimposition?

• A. RPO
• B. LPO
• C. Supine
• D. Prone

Answer: (A)

The choice that demonstrates the left kidney parallel to the image receptor while keeping the right ureter free of superimposition is the right posterior oblique (RPO) position. When patients are positioned in the RPO, the left kidney is optimally visualized due to its anatomical orientation. In this position, the patient is rotated approximately 30 to 45 degrees toward the right side, allowing the left kidney to align parallel to the image receptor.

This positioning also effectively distances the right ureter from the left kidney and any surrounding structures, reducing the chance of superimposition. By angling the patient in this way, the radiographer can obtain clear images of the left kidney while minimizing overlap with other anatomical parts, such as the right kidney or ureters, facilitating a better diagnostic view.

In contrast, other positions would not provide the same level of clarity or the necessary angles for optimal visualization of both the left kidney and the right ureter. For example, the left posterior oblique (LPO) would not be suitable as it would demonstrate the right kidney in a more advantageous position and may not isolate the left kidney effectively. The supine position places both kidneys directly perpendicular to the image receptor, resulting in potential superimposition, and the