Reproducibility and Correlation of X-Ray Meters for Monitoring Scatter Radiation During Fluoroscopic Procedures

Area of Science:

• Medical Physics
• Radiation Dosimetry
• Clinical Imaging

Background:

• The accuracy of solid-state radiation dosimeters in pulsed, low-energy X-ray procedures is not well-established.
• Clinical applications require reliable radiation monitoring tools.

Purpose of the Study:

• To evaluate the reliability and accuracy of solid-state and Geiger-Mueller radiation detectors in a clinical, low-energy, pulsed X-ray environment.
• To assess the impact of detector angulation on radiation measurements.

Main Methods:

• Three clinical meters (solid-state X2, solid-state i3, Geiger-Mueller RadFlash) were compared against an ion chamber meter.
• Reproducibility and inter-meter relationships were calculated.
• The effect of angulation (0° to 45°) on measurements was investigated.

Main Results:

• All tested meters demonstrated good reproducibility.
• Solid-state meters (X2, i3) and the ion chamber showed linear agreement; the Geiger-Mueller meter (RF) overestimated dose rates.
• Solid-state meters showed significantly reduced readings at 20° and 45° angulation, unlike the RF meter which was only affected at 45°.

Conclusions:

• The tested meters are suitable for measuring scatter radiation in low-energy, pulsed fluoroscopy.
• Careful angulation is crucial for solid-state detectors to ensure accurate dose rate measurements.
• Differences in readings between meter types should be considered during clinical use.