American Society of Radiologic Technologist (ASRT) Practice Exam

Which type of urography involves catheterization of the ureters by a urologist?

1. Cystourethrography

2. Intravenous urography

3. Cystoureterography

4. Retrograde urography

The correct answer is: Retrograde urography

Retrograde urography is the correct answer because it specifically involves the direct catheterization of the ureters to administer contrast media. This procedure is typically performed by a urologist and is used to visualize the urinary tract, particularly when there is a need to assess the ureters and the renal pelvis. By introducing the contrast material directly into the ureters, this technique allows for a detailed view of the urinary system, which can be useful in diagnosing conditions such as obstructions or renal stones. On the other hand, cystourethrography focuses on the bladder and urethra rather than the ureters, utilizing a different imaging approach that doesn’t require direct catheterization of the ureters. Intravenous urography involves the injection of contrast material into a vein and its subsequent excretion by the kidneys, allowing visualization of the renal anatomy without the necessity of ureteral catheterization. Cystoureterography combines aspects of visualizing both the bladder and the ureters but does not exclusively involve catheterization of the ureters by a urologist. This distinction clarifies why retrograde urography is the most specific choice for the scenario described.