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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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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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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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Fluoroscopic imaging optimization in children during percutaneous nephrolithotrispy.

Ahmed Fahmy1, Omar Elgebaly1, Mohamed Youssif1

  • 1Faculty of Medicine, Urology Department, Alexandria University, Egypt.

Journal of Pediatric Urology
|August 5, 2020
PubMed
Summary

Implementing a radiation dose reduction strategy significantly lowered radiation exposure during pediatric percutaneous nephrolithotomy (PCNL). This optimization reduced fluoroscopy time and dose area product without negatively impacting surgical outcomes.

Keywords:
ChildrenOptimaziationPercutaneous nephrostomyRadiation

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Area of Science:

  • Pediatric Urology
  • Medical Imaging
  • Radiation Oncology

Background:

  • Radiation protection management emphasizes minimizing radiation exposure while preserving image quality, adhering to the As Low As Reasonably Achievable (ALARA) principle.
  • Percutaneous nephrolithotomy (PCNL) in children involves fluoroscopic guidance, necessitating strategies to reduce radiation dose.
  • Optimizing fluoroscopic imaging is crucial for pediatric procedures due to children's increased radiosensitivity.

Purpose of the Study:

  • To compare radiation exposure, measured by Dose Area Product (DAP) and Fluoroscopy Time (FT), during pediatric PCNL before and after implementing a radiation dose reduction strategy.
  • To evaluate the impact of the optimized fluoroscopy protocol on surgical outcomes in pediatric PCNL.
  • To assess the feasibility and effectiveness of intraoperative radiation dose reduction techniques in pediatric urology.

Main Methods:

  • A prospective study comparing two groups of children undergoing PCNL for kidney stones.
  • Group 1 (n=56) underwent PCNL with an implemented radiation dose reduction strategy, including table positioning, pulsed fluoroscopy with last image hold, beam collimation, and a dedicated fluoroscopy technician.
  • Group 2 (n=42) served as a control group, undergoing PCNL before the dose reduction strategy implementation.

Main Results:

  • Dose Area Product (DAP) decreased by 44% (from 2.46 to 1.38 mGy m²) in the group with the radiation reduction strategy (p < 0.04).
  • Total fluoroscopy time (FT) was significantly reduced by 55% (from 100.8s to 45s) after protocol implementation (p < 0.002).
  • The optimized protocol achieved significant radiation dose reduction with minimal impact on image quality.

Conclusions:

  • Optimization of fluoroscopic imaging significantly reduces radiation exposure in pediatric PCNL.
  • The implemented reduced radiation protocol did not increase surgical complexity, operative time, or complication rates.
  • This strategy effectively lowers radiation risks in a vulnerable pediatric population undergoing PCNL.