Linear relationship between absorbed radiation dose and pulse rate during fluoroscopy.

Area of Science:

• Medical Imaging Physics
• Radiological Sciences
• Radiation Oncology

Background:

• Fluoroscopy is a widely used imaging technique in various medical procedures.
• Optimizing radiation dose is crucial for patient safety and minimizing risks.
• Understanding the relationship between fluoroscopy parameters and radiation dose is essential for effective dose management.

Purpose of the Study:

• To investigate the correlation between fluoroscopy pulse rate and absorbed radiation dose.
• To compare absorbed radiation dose with fluoroscopy time and C-arm reported dose.
• To determine the effectiveness of low-dose settings and reduced pulse rates in lowering radiation exposure.

Main Methods:

• Simulated patient model used for controlled fluoroscopy exposures.
• Experiments conducted at varying pulse rates (30, 8, 4, 2, 1 pulse/sec) on standard and low-dose settings.
• Absorbed radiation dose measured using Landauer nanoDot™ OSL dosimeters.

Main Results:

• A significant linear correlation was observed between fluoroscopy pulse rate and absorbed radiation dose (R² > 0.995 for both settings).
• Low-dose settings reduced absorbed radiation dose by 58% (±2.8%) compared to standard settings.
• Combining 1 pulse/sec with low-dose settings reduced absorbed dose by 97.7% (±0.1%) compared to standard settings.

Conclusions:

• Absorbed radiation dose decreases linearly with decreasing fluoroscopy pulse rate.
• Adjusting pulse rate and utilizing low-dose settings are effective strategies for substantial radiation dose reduction.
• Optimized fluoroscopy protocols can significantly enhance patient safety during interventional procedures.