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Imaging Studies IV: Magnetic Resonance Imaging

Imaging Studies IV: Magnetic Resonance Imaging

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...

Imaging Studies I: Kidney, Ureter, and Bladder Studies

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Kidney, Ureter, and Bladder (KUB) StudiesKidney, Ureter, and Bladder (KUB) studies are standard diagnostic imaging procedures used to assess the anatomy of the urinary system. They are commonly utilized for patients experiencing abdominal pain or urinary symptoms. By using a simple X-ray of the abdomen, KUB studies can reveal structural and pathological abnormalities within the kidneys, ureters, and bladder. These studies are particularly valuable in diagnosing kidney stones, urinary...

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...

Urologic Endoscopic Procedure: Cystoscopic Examination

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Meaning of Cystoscopic Examination:Cystoscopy is an essential diagnostic tool in urology that is used to assess the structure and function of the genitourinary system. It provides a direct view of the urethra, bladder, and, in some cases, the ureteral openings. This procedure helps detect structural abnormalities, infections, cancers, and blockages in the urinary tract. There are two types of cystoscopy:Flexible cystoscopy is commonly performed in outpatient settings due to its less invasive...

Ureters

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The ureters are retroperitoneal tubes located on either side of the vertebral column. They are responsible for transporting urine from each kidney to the urinary bladder. These tubes have thick walls and are approximately 25-30 cm long. Their diameter is around 10 mm at the renal pelvis, gradually narrowing to 1 mm as the ureter obliquely enters the posterior bladder wall through the ureteric orifices. The shape of these orifices is slit-like, which helps to prevent urine backflow toward the...

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Related Experiment Video

Updated: Jan 9, 2026

Introduction of an Integrated Pathology Image Management, Artificial Intelligence, and Reporting System

Introduction of an Integrated Pathology Image Management, Artificial Intelligence, and Reporting System

Published on: July 11, 2025

An Artificial Intelligence-Based System for Identifying Ureteral Stricture Regions.

Jong Mok Park¹, Khae-Hawn Kim¹

¹Department of Urology, Chungnam National University Sejong Hospital, Chungnam National University College of Medicine, Sejong, Korea.

International Neurourology Journal

|December 8, 2025

Summary

This summary is machine-generated.

This study introduces an AI system using YOLOv5 for precise ureteral stricture identification, enhancing surgical guidance and efficiency. The system achieved high accuracy, improving surgical outcomes for patients.

Keywords:

Endoscopy Region detection Surgical assistance technology Ureteral stricture YOLOv5

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Area of Science:

Urology
Medical Imaging
Artificial Intelligence

Background:

Ureteral stricture poses a significant challenge in urological surgery.
Accurate identification of the stenotic site is crucial for effective surgical intervention.

Purpose of the Study:

To propose a technical system for accurate identification and surgical guidance of ureteral stricture.
To enhance surgical efficiency in treating patients with ureteral stricture.

Main Methods:

Utilized the YOLOv5 algorithm, an artificial intelligence technology, for real-time image analysis.
Applied the system to detect the precise location of ureteral stenosis.
Selected YOLOv5 for rapid and accurate detection of the stenotic area.

Main Results:

The system demonstrated high recognition accuracy with an average sensitivity of 0.95.
This sensitivity confirms the system's precise guidance capabilities for identifying stenotic sites.
The AI-driven approach provided reliable detection of ureteral strictures.

Conclusions:

The YOLOv5-based system effectively supports surgical procedures for ureteral stricture.
Real-time image analysis by the system aids in accurate stricture detection.
Future work will focus on refining boundary estimations for stricture localization.