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Related Concept Videos

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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Urinary Tract Calculi III: Medical Management01:30

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The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
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Imaging Studies II: Ultrasonography01:24

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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Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

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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Urinary Tract Calculi VI: Surgical Management01:25

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Procedures for Kidney StonesMedical intervention is necessary when kidney stones or renal calculi are too large to pass spontaneously (typically greater than 5 millimeters) when stones are accompanied by symptomatic infection (such as fever or pyelonephritis), when they impair kidney function, or when they cause persistent symptoms like severe pain, nausea, or urinary retention. Additionally, patients with only one kidney or those who cannot be treated with medical management also require...
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Imaging Studies I: Kidney, Ureter, and Bladder Studies01:28

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...
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Dual-Energy CT for Urinary Stone Evaluation.

Alex Nourian1, Eric Ghiraldi1, Justin I Friedlander2,3

  • 1Department of Urology, Einstein Healthcare Network, 1200 Tabor Road, 3rd Floor Sley Building, Philadelphia, PA, 19141, USA.

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|November 28, 2020
PubMed
Summary

Dual-energy CT (DECT) enhances kidney stone diagnosis by accurately identifying uric acid stones, unlike conventional CT. This technology offers high accuracy and potential for guiding treatment, improving patient outcomes in nephrolithiasis management.

Keywords:
Dual-energy CTImagingNephrolithiasisRadiation exposureStone compositionUric acid

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Area of Science:

  • Radiology
  • Urology
  • Medical Imaging

Background:

  • Conventional computed tomography (CT) is effective for diagnosing nephrolithiasis (kidney stones).
  • However, conventional CT has limitations in determining the chemical composition of kidney stones.
  • Dual-energy CT (DECT) offers potential to overcome these limitations.

Purpose of the Study:

  • To review the current clinical utility of DECT in the diagnosis and management of nephrolithiasis.
  • To evaluate DECT's effectiveness in differentiating stone composition compared to conventional CT.

Main Methods:

  • Review of current literature on DECT applications in nephrolithiasis.
  • Analysis of DECT's diagnostic performance, including sensitivity and specificity for stone composition.
  • Assessment of radiation dose protocols and effectiveness in diverse patient populations.

Main Results:

  • DECT significantly outperforms conventional CT in distinguishing uric acid stones from other types, with >95% accuracy.
  • DECT protocols can achieve dose reduction, offering lower effective radiation doses than conventional CT.
  • DECT is effective even in patients with large body mass and can guide medical dissolution therapy for uric acid stones.

Conclusions:

  • DECT is a superior imaging tool for characterizing kidney stone composition, particularly uric acid stones.
  • Its accuracy aids in guiding targeted therapeutic strategies, such as medical dissolution.
  • Further research into DECT's role in overall patient management is recommended to support wider adoption.