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Imaging Studies V: Intravenous Urography and Retrograde Pyelography

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

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...

Imaging Studies I: Kidney, Ureter, and Bladder Studies

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Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

Imaging Studies II: Ultrasonography

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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...

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Related Experiment Video

Updated: Sep 19, 2025

Urethral Stricture Induction Followed by Buccal Mucosa Graft Urethroplasty in a Rat Model

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Published on: April 28, 2023

Radiographical Changes after Ureteral Rest for Robotic Ureteral Reconstruction.

Matthew Lee¹, Nathan Liss², Kelley Zhao¹

¹Department of Urology, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA.

Journal of Endourology

|June 10, 2025

Summary

Ureteral rest before robotic ureteral reconstruction can alter ureteral stricture quality and length. These radiographical changes may inform surgical decisions for better outcomes.

Keywords:

robotics surgery ureter ureteral rest

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An Immature Murine Model of Reversible Unilateral Ureteral Obstruction

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An Immature Murine Model of Reversible Unilateral Ureteral Obstruction

An Immature Murine Model of Reversible Unilateral Ureteral Obstruction

Published on: April 4, 2025

Area of Science:

Urology
Radiology
Surgical Innovation

Background:

Ureteral strictures pose a challenge in reconstructive surgery.
Robotic ureteral reconstruction (RUR) is an advanced technique for management.
The role of ureteral rest in optimizing RUR is not fully understood.

Purpose of the Study:

To evaluate radiographical changes after ureteral rest prior to RUR.
To assess the impact of ureteral rest on stricture quality and length.
To determine the value of these changes in surgical decision-making.

Main Methods:

Retrospective review of 50 patients undergoing ureteral rest before RUR (2018-2022).
Ureteral rest defined as absence of hardware across the stricture.
Radiographical analysis of pre- and post-ureteral rest pyelograms by a genitourinary radiologist.

Main Results:

Median ureteral rest duration was 11.1 weeks.
12.0% of narrowed strictures progressed to obliterative.
74.0% of patients showed increased stricture length (median 0.2 cm).
88.0% surgical success rate at 6.2 months follow-up.

Conclusions:

Ureteral rest can modify ureteral stricture characteristics.
Radiographical changes observed may influence surgical planning for RUR.
This approach may enhance outcomes in ureteral stricture management.