American Society of Radiologic Technologist (ASRT) Practice Exam

Which device is NOT used for personnel cumulative radiation monitoring?

1. Film badge

2. Thermoluminescent dosimeter badge

3. Optically stimulated luminescence badge

4. Pocket ion chamber

The correct answer is: Pocket ion chamber

The pocket ion chamber is not commonly used for personnel cumulative radiation monitoring because it is primarily designed for immediate radiation dose assessment rather than long-term cumulative exposure. Pocket ion chambers provide a quick readout of radiation exposure, making them suitable for real-time monitoring during specific procedures or time-sensitive situations. However, they do not retain data over long periods, limiting their effectiveness for tracking cumulative exposure. In contrast, devices such as film badges, thermoluminescent dosimeter (TLD) badges, and optically stimulated luminescence (OSL) badges are specifically designed to accumulate and store radiation exposure over time. These devices allow for periodic readings, enabling the assessment of cumulative radiation dose for personnel over days, weeks, or months. By analyzing the developed film or the luminescent properties of the materials, these badges provide a comprehensive record of the radiation exposure, making them essential for ensuring safety and regulatory compliance in environments where radiation exposure is a concern.