Computed Tomography Urography (CTU) vs Intravenous Urography (IVU) on Patients at Risk of Urothelial Tumors

The goal of this clinical research study is to use computed tomography urography (CTU) scans and intravenous urography (IVU) scans to check the status of urothelial cancer, in order to try to learn the level of effectiveness of possibly using CTU by itself in future patients.

Inclusion Criteria: 1. Patients who will undergo IVU using digital tomosynthesis and staging abdomino-pelvic CT as part of their routine care will be invited to participate in this study. 2. Patients who have been referred for CTU will also be invited to participate in the study. 3. Such patients will typically 1. Have histologically proven TCC, or 2. Have bladder tumors of Stage ≥ T3, or 3. Had cystectomies for bladder cancer, or 4. Upper tract TCC. 4. \>18 years age. 5. Written informed consent will be obtained from patients. Patient exclusion criteria: 1. Elevated serum creatinine of \>2 2. Allergy to intravenous CT contrast media 3. Ureteral stint present or removed within six weeks 4. Women of child bearing potential