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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Imaging Studies I: Kidney, Ureter, and Bladder Studies01:28

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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...
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Imaging Studies II: Ultrasonography01:24

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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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Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

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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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Ureters01:22

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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Imaging Studies IV: Magnetic Resonance Imaging01:27

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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,...
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Author Spotlight: Developing a Bedside Protocol for Kidney and Genitourinary Ultrasonography
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Korean ureter length: A computed tomography-based study.

Sung Il Jung1, Hee Sun Park1, Mi Hye Yu1

  • 1Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine, Seoul, Korea.

Investigative and Clinical Urology
|May 8, 2020
PubMed
Summary
This summary is machine-generated.

Ureter length in healthy Koreans was measured using CT scans. This ureter length (ULCT) can be estimated using the length between the ureteropelvic and ureterovesical junctions (LLCT), with LLCT providing the most accurate indirect measurement.

Keywords:
KoreaTomography, x-ray computedUreter

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Area of Science:

  • Urology
  • Radiology
  • Anatomy

Background:

  • Accurate measurement of ureter length is crucial for various urological procedures.
  • Previous studies have not established reliable indirect methods for estimating ureter length in the Korean population.

Purpose of the Study:

  • To measure ureter length in healthy Koreans using reformatted computed tomography (ULCT).
  • To identify indirect estimation methods for ureter length by measuring the length between the ureteropelvic junction and the ureterovesical junction (LLCT) and body height.

Main Methods:

  • Retrospective study including 508 ureters from 254 healthy Korean patients.
  • Measurements included ULCT, LLCT, and standing and sitting body height using computed tomography.

Main Results:

  • Mean left and right ULCT were 25.2±2.2 cm and 25.0±2.2 cm, respectively.
  • Mean left and right LLCT were 21.1±1.8 cm and 20.3±1.9 cm, respectively.
  • LLCT showed a significant linear correlation with ULCT (r²=0.485), enabling indirect estimation via the equation: ULCT = 0.823 × LLCT + 8.093.

Conclusions:

  • Ureter length in healthy Koreans can be accurately measured using ULCT.
  • LLCT provides the most accurate indirect estimation of ureter length compared to body height.
  • The derived equation allows for reliable indirect estimation of ureter length in clinical practice.