American Society of Radiologic Technologist (ASRT) Practice Exam

For the optimum image of the right kidney during urography, what position should a patient be in?

1. Right posterior oblique (RPO)

2. Left posterior oblique (LPO)

3. Lateral

4. Supine

The correct answer is: Left posterior oblique (LPO)

To achieve the optimum image of the right kidney during urography, positioning the patient in the left posterior oblique (LPO) position is ideal. This position allows the right kidney to be more perpendicular to the x-ray beam, enhancing visualization. By angling the patient to the left, the right kidney is rotated away from the midline and projected more clearly against the backdrop of the surrounding structures. The LPO position reduces the superimposition of the kidney with the spine and other pelvic structures, allowing for a more distinct image. This technique is particularly beneficial because it helps differentiate the anatomy and any potential abnormalities in the right kidney. Each of the other positions may not provide the same clarity or visualization for the right kidney. For instance, the right posterior oblique (RPO) position may not adequately separate the kidney from the spine, leading to potential image overlap. A lateral position could better show the kidney's lateral aspect but may not provide a comprehensive view of the renal contour or any abnormalities. The supine position might also not provide sufficient separation from the surrounding structures, making it harder to visualize the kidney effectively. In urography, optimal positioning is critical for diagnostic imaging quality, and choosing the left posterior oblique position is a