CT urography (protocol)
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At the time the article was created Ian Bickle had no recorded disclosures.
View Ian Bickle's current disclosuresAt the time the article was last revised Tariq Walizai had no financial relationships to ineligible companies to disclose.
View Tariq Walizai's current disclosures- CT-intravenous urogram
- CT-intravenous urograms
- CT-IVU
- CT urogram
- CTU
- CT IVP
CT urography (CTU or CT IVU), also known as CT intravenous pyelography (CT IVP), has now largely replaced traditional IVU in imaging the genitourinary tract. It gives both anatomical and functional information, albeit with a relatively higher dose of radiation.
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Indications
urothelial cancer surveillance
congenital collecting system abnormality
CTU has high sensitivity (96-100%) and high specificity (94-100%) of identifying ureteric and bladder calculi 2.
Purpose
The aim is to illustrate the collecting systems, ureters and bladder with intravenous contrast, albeit in a single acquisition as opposed to the multiple and more dynamic traditional IVU. Visualization of other structures in the abdomen is also better with CTU than with traditional IVU. Upper tract tumors, strictures and to a degree the function of the kidney can be assessed.
Technique
A variety of techniques have been described 1. A CTU may be performed along with other CT studies of the genitourinary tract, such as a 3 or 4 phase or split bolus study 2.
See also
References
- 1. McTavish JD, Jinzaki M, Zou KH et-al. Multi-detector row CT urography: comparison of strategies for depicting the normal urinary collecting system. Radiology. 2002;225 (3): 783-90. Radiology (full text) - doi:10.1148/radiol.2253011515 - Pubmed citation
- 2. Moloney F, Murphy K, Twomey M, O’Connor O, Maher M. Haematuria: An Imaging Guide. Advances in Urology. 2014;2014:1-9. doi:10.1155/2014/414125 - Pubmed
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- Right ureteric injury from penetrating trauma
- Transitional cell carcinoma of the renal pelvis
- Normal split bolus study
- Normal kidneys on 4-phase CT study
- Hydronephrosis due to ureteric stone
- Distal ureteric tumour
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