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Imaging Studies V: Intravenous Urography and Retrograde Pyelography

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IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...

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Updated: May 22, 2026

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis

Intrarenal Injection of Escherichia coli in a Rat Model of Pyelonephritis

Published on: July 18, 2017

Imaging in upper urinary tract infections.

J Ifergan¹, R Pommier, M-C Brion

¹General Radiology Department, Bicêtre Hospital, AP-HP, University Paris Sud, 78, rue du Général-Leclerc, 94275 Le Kremlin-Bicêtre, France.

Diagnostic and Interventional Imaging

|May 1, 2012

Summary

This summary is machine-generated.

Most upper urinary tract infections don't need emergency imaging. A timely sonogram usually suffices, but complicated cases may require a contrast-enhanced CT scan for better diagnosis and complication assessment.

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Area of Science:

Radiology
Urology
Infectious Diseases

Background:

Upper urinary tract infections (UTIs) are common but typically managed without immediate advanced imaging.
Prompt diagnosis is key to preventing complications and guiding appropriate treatment.

Observation:

Sonography within 48 hours is often sufficient for uncomplicated cases, ruling out obstructed pyelonephritis.
Complicated UTIs or those in compromised patients necessitate urgent contrast-enhanced CT scans.

Findings:

CT scans offer superior diagnostic accuracy and complication detection compared to sonography for pyelonephritis.
Radiologists must recognize rare pseudotumoral forms of pyelonephritis for accurate diagnosis.

Implications:

Appropriate imaging selection (sonogram vs. CT) optimizes patient management and resource utilization.
Awareness of rare pyelonephritis variants aids in avoiding unnecessary invasive procedures and guides targeted therapy.