Impact of ¹⁸F-FDG Vials on Well Counter Background Radiation: Evaluating Shielding and Distance Effects

Area of Science:

• Nuclear Medicine
• Radiopharmaceutical Science
• Radiation Safety

Background:

• ¹⁸F-FDG is a key PET imaging agent emitting high-energy photons.
• Hot labs require understanding environmental radiation factors for safety and accuracy.
• Background radiation impacts workflow and instrument calibration.

Purpose of the Study:

• To evaluate the impact of shielding and distance on background radiation levels.
• To quantify radiation exposure from ¹⁸F-FDG vials in a hot lab setting.
• To determine the effectiveness of tungsten shielding and spatial separation.

Main Methods:

• Measurements of ¹⁸F-FDG vials using a well counter.
• Testing under 7 conditions including varying distances (1-3m) and tungsten shielding.
• Recording and analyzing count rates (cpm) for each condition.

Main Results:

• Unshielded ¹⁸F-FDG showed significantly higher radiation levels compared to shielded vials.
• Tungsten shielding reduced radiation exposure by up to 97.5% at 1 meter.
• Shielded measurements at 3 meters approached background radiation levels.

Conclusions:

• Both distance and shielding effectively reduce radiation exposure from ¹⁸F-FDG.
• Greatest shielding benefit observed at closer distances, highlighting compounded effectiveness.
• Spatial and protective strategies are vital for hot lab safety, compliance, and accurate measurements.