CT cystography is a specialized imaging examination that uses computed tomography (CT) to accurately visualize the urinary bladder. It is often combined with the use of a contrast agent, which is introduced directly into the bladder through a catheter, in order to better visualize its interior. CT cystography is highly accurate for detecting bladder ruptures or leaks and provides three-dimensional images of the bladder and surrounding tissues.
CT cystography is primarily indicated for the investigation of:
- Bladder trauma (e.g., after pelvic injury or car accident)
- Ruptures of the urinary bladder
- Vesicoureteral reflux (backflow of urine into the ureters)
- Perforation of the bladder after surgery or catheterization
- Bladder tumors
- Unexplained hematuria (in combination with other tests)
Preparation and Procedure
A thin catheter is inserted into the bladder through the urethra. A contrast agent is then administered directly into the bladder. The patient lies on the CT scanner, and image acquisitions are performed to assess the bladder interior and identify any leaks or abnormalities.
Usually, fasting is not required, unless the test is combined with other procedures. The patient should inform the doctor if they have a contrast allergy or a urinary tract infection. The procedure may cause mild discomfort due to the catheter.