CAMRT Radiography Practice Exam 2025 - Free Radiography Practice Questions and Study Guide

Retrograde urography is indeed characterized by the direct injection of contrast medium into the renal pelvis via a catheter, which differentiates it from excretory urography. In excretory urography, also known as intravenous pyelography (IVP), the contrast medium is injected intravenously, allowing it to travel through the bloodstream and filter through the kidneys, providing a view of the urinary tract as it naturally fills. In contrast, retrograde urography is utilized when imaging of the urinary tract is necessary but cannot be obtained through the normal excretory route, such as when there are obstructions or complications that prevent the proper passage of urine. This method involves a more invasive approach, targeting the kidneys directly with the contrast medium to visualize any potential issues. Therefore, the statement is accurate, as the defining aspect of retrograde urography is the direct administration of contrast to the renal pelvis.