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125:) to evaluate the perfusion and vascularity of the kidneys. CT scan taken at 90 to 180 seconds (when the contrast perfused the whole kidney) to evaluate the characteristics of kidney masses. The contrast starts to drain into the collecting system of the kidneys at 3 minutes after injection and the whole collecting system is well distended with contrast at 8 to 10 minutes. Taking a CT scan at this time is useful to evaluate any strictures or masses from within the ureters or from outside but compressing on the ureters. Contrast CT urography is also useful to monitor whether a tumour is responding to treatment.
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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
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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
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A person may have an allergy to the contrast dye. When this occurs, it is usually mild, causing symptoms such as an itch or a rash, however rarely causes a serious reaction such as anaphylaxis that may impair breathing. The contrast dye may not all go inside the vein at the cannula site, and if it
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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
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extravasates, it may cause pain or bruising to the local area. The scan involves radiation, which may increase the risk of future cancers by a very small amount, or prove damaging to a pregnancy. Additionally, the dye used can
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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).
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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
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CT urography (CTU) 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.
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Plain CT urography (without contrast) is used to evaluate stone diseases, calcifications within kidneys, density of renal masses and presence of any bleeding before contrast is given. Then
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CT scan while the contrast is within the kidneys (a parenchymal phase), and a CT scan taken while the contrast travels through the renal tract (an excretory phase).
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Kawashima, Akira; Vrtiska, Terri J.; LeRoy, Andrew J.; Hartman, Robert P.; McCollough, Cynthia H.; King, Bernard F. (October 2004).
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to evaluate kidney tumours (if any) and urinary tract. CT scan is then taken at 30 to 70 seconds (when the contrast reaches the
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Noorbakhsh, Abraham; Aganovic, Lejla; Vahdat, Noushin; Fazeli, Soudabeh; Chung, Romy; Cassidy, Fiona (December 2019).
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306:"What a difference a delay makes! CT urogram: a pictorial essay"
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278:"CT urogram | Bladder cancer | Cancer Research UK"
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16:Medical Imaging test done on CT scanner
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734:Extracorporeal shockwave therapy
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87:through a cannula into a vein
53:computed tomography urography
592:Artificial urinary sphincter
451:Percutaneous nephrolithotomy
597:Urethral bulking injections
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684:Voiding cystourethrography
322:10.1007/s00261-019-02086-0
78:is injected into a vein.
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627:Urinary tract ultrasound
282:www.cancerresearchuk.org
712:Urinary catheterization
669:Radioisotope renography
679:Retrograde urethrogram
483:Kidney transplantation
169:damage kidney function
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91:cleared by the kidneys
549:Suprapubic cystostomy
235:10.1148/rg.24si045513
197:www.radiologyinfo.org
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81:In a CT urogram, the
516:Ureterosigmoidostomy
229:(suppl_1): S35–S54.
310:Abdominal Radiology
65:computed tomography
689:Urodynamic testing
602:Cystourethrography
375:www.mayoclinic.org
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111:iodinated contrast
70:that examines the
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119:renal cortex
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722:Lithotripsy
674:Cystography
637:Intravenous
577:Urethrotomy
572:Urethropexy
478:Nephrectomy
466:Nephroscopy
439:Nephrostomy
193:"Urography"
739:Urinalysis
694:Cystometry
659:CT urogram
642:Retrograde
554:Cystoscopy
544:Cystectomy
488:Nephropexy
456:Nephrotomy
380:2020-07-04
287:2020-07-04
175:References
152:CT Scanner
61:CT urogram
22:CT urogram
647:Antegrade
632:Pyelogram
461:Endoscopy
330:2366-004X
243:0271-5333
129:Procedure
113:is given
33:Radiology
28:Specialty
758:Category
348:31214728
148:artefact
95:excreted
619:Imaging
611:General
564:Urethra
536:Bladder
339:8882435
63:) is a
498:Ureter
431:Kidney
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202:4 July
74:after
705:Other
162:Risks
99:urine
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344:PMID
326:ISSN
239:ISSN
204:2020
121:and
105:Uses
93:and
68:scan
652:Gas
334:PMC
318:doi
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