FIGURE 8. Selected images from a<unk>  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<unk> . These images confirm soft tissue mass (arrows) in the renal pelvis with contrast excretion into the collecting system (arrowheads).<unk>  <unk>  is commonly used in the evaluation of hematuria, and specifically tailored to image the renal collecting system, ureters and bladder in addition to the renal parenchyma. Before the procedure, a person is often asked about things that might put them at risk - for example pregnancy or an allergy to contrast. They are asked to drink water, and not to urinate, so that the bladder is full. Metal objects such as earrings, which might produce artefact on the image, are removed. An intravenous cannula is inserted and contrast dye is injected through this during the scan. The scan involves a person lying down on a table that is put through a CT Scanner. The CT scan will image the urinary tract, including the kidney, ureters, bladder, and urethra. It does this by taking many cross-sectional images that can be computationally arranged so as to provide 3D information. The scan itself usually involves a CT scan without contrast (a non-contrast phase), a CT scan while the contrast is within the kidneys (a parencyhmal phase), and a CT scan taken while the contrast travels through the renal tract (an excretory phase).
Computed tomography urography
Urinary tract ultrasound
Cystography
Urinary cast
Cystoscopy
Cystometry
Urine cytology
Ureteroscopy