Computed tomography urography

[1] In a CT urogram, the contrast agent is through a cannula into a vein, allowed to be cleared by the kidneys and excreted through the urinary tract as part of the urine.

[citation needed] Before the procedure, a person is often asked about things that might put them at risk – for example pregnancy or an allergy to contrast.

[5] The CT scan will image the urinary tract, including the kidney, ureters, bladder, and urethra.

[3] The contrast dye may not all go inside the vein at the cannula site, and if it extravasates, it may cause pain or bruising to the local area.

[3] The scan involves radiation, which may increase the risk of future cancers by a very small amount,[3] or prove damaging to a pregnancy.

FIGURE 8. Selected images from a CT Urography protocol CT. 8a is an axial CT image from the renal parenchymal phase. There is a mildly enhancing soft tissue mass in the left renal pelvis (arrow) consistent with a transitional cell carcinoma. Figure 8b (coronal reformats) and 8c (left oblique coronal reformats) demonstrate the double bolus technique of CT Urography. These images confirm soft tissue mass (arrows) in the renal pelvis with contrast excretion into the collecting system (arrowheads). [ citation needed ]