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Related Experiment Video

Updated: May 18, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Radiation exposure during continuous and pulsed fluoroscopy.

Damien L Smith1, Jonathan P Heldt, Gideon D Richards

  • 1Department of Urology, Loma Linda Universit , Loma Linda, CA 92354, USA.

Journal of Endourology
|September 13, 2012
PubMed
Summary
This summary is machine-generated.

Pulsed fluoroscopy significantly reduces radiation dose and fluoroscopy time during ureteroscopy compared to continuous mode. This imaging technique is adequate for visualizing guidewires and stones, making it a valuable tool for minimizing patient exposure.

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Area of Science:

  • Medical Imaging
  • Urology
  • Radiation Physics

Background:

  • Older C-arm systems show variable radiation exposure with pulsed fluoroscopy due to ramp and trail effects.
  • Modern C-arm systems require updated comparisons of pulsed versus continuous fluoroscopy modalities.

Purpose of the Study:

  • To compare radiation doses delivered by pulsed and continuous fluoroscopy modes.
  • To evaluate image quality and adequacy for ureteroscopy tasks using a modern C-arm system.

Main Methods:

  • Thermoluminescent dosimeters (TLDs) measured radiation dose at three body locations during simulated ureteroscopy.
  • Thirty pedal activations were performed in pulsed or continuous modes to visualize guidewires and stones.
  • Absorbed radiation and image quality were compared between the two imaging modes.

Main Results:

  • Pulsed fluoroscopy delivered significantly less radiation (e.g., 0.10 vs 0.26 mGy anterior skin, P<0.001).
  • Mean fluoroscopy time was substantially reduced with pulsed mode (3.0 vs 12.5 seconds, P<0.001).
  • Pulsed images were deemed adequate for guidewire identification (100%) and stone localization (90.5%).

Conclusions:

  • Pulsed fluoroscopy reduced fluoroscopy time by 76% and radiation dose by 64%.
  • Pulsed fluoroscopy provides adequate imaging for most ureteroscopy tasks.
  • Consider pulsed fluoroscopy to reduce radiation exposure during ureteroscopy.