Which radiographic test images the bladder after contrast via catheter?

• A. Cystography
• B. Voiding Cystourethrogram
• C. IVP
• D. Urography

Answer: (A)

Imaging the bladder after placing contrast directly into it through a catheter is the approach used in cystography. In this procedure, contrast material is instilled into the bladder via a urethral catheter and radiographs or fluoroscopy are used to visualize the bladder’s shape, capacity, and any leaks or abnormalities once the bladder is filled.

This differs from tests that rely on intravenous contrast to visualize the urinary tract (such as intravenous pyelography/urography), which focus on the kidneys, ureters, and bladder after systemic contrast, not on imaging the bladder after direct instillation. It also differs from a voiding study, which images the bladder and urethra during urination to assess function and identify vesicoureteral reflux or urethral abnormalities.

So, the test that best matches imaging the bladder after contrast is introduced via catheter is cystography.