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[Real-time Lens Exposure Dose Measurement Using a Scintillator with Optical Fiber Dosimeter during Cardiac Catheter

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Nihon Hoshasen Gijutsu Gakkai Zasshi
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This study shows a new scintillator with optical fiber (SOF) dosimeter can accurately measure real-time eye lens radiation dose for interventional radiology operators. This real-time visualization helps monitor and manage operator exposure during procedures.

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lens exposure dosescattered radiation measurementscintillator with optical fiber detector

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Area of Science:

  • Medical Physics
  • Radiation Protection
  • Radiological Sciences

Background:

  • Operator eye lens radiation dose is a significant concern in interventional radiology.
  • Accurate real-time dosimetry is crucial for effective radiation protection.

Purpose of the Study:

  • To evaluate the feasibility of a scintillator with optical fiber (SOF) dosimeter for real-time eye lens dose measurement.
  • To calibrate the SOF dosimeter for scattered X-rays and assess its accuracy.

Main Methods:

  • SOF dosimeter calibration for scattered X-rays, including energy dependence analysis.
  • Comparison with radiophotoluminescence glass (RPLG) dosimeters during cardiac catheterization in a phantom.
  • Detection limit determination using the Kaiser method.

Main Results:

  • The SOF dosimeter demonstrated a 5.45% error rate compared to ionization chamber measurements in phantom studies.
  • Sensitivity showed a slight decrease at higher effective energies (max 18.5% difference).
  • Accuracy of integrated dose measurements ranged from 4.3% to 15.5% error compared to RPLG dosimeters.

Conclusions:

  • The SOF dosimeter offers a feasible method for real-time eye lens dose monitoring in interventional radiology.
  • It provides relatively high accuracy and real-time visualization of exposure status.
  • Further refinement may be needed to address noise influence on long-term measurements.