Certified Healthcare Safety Professional (CHSP) Practice Exam

Why is thermoluminescent dosimetry favored over film badges in certain tasks?

1. It is less expensive to use

2. It provides more accurate measurements

3. It requires less training

4. It is simpler to operate

The correct answer is: It provides more accurate measurements

Thermoluminescent dosimetry (TLD) is favored over film badges in certain contexts primarily because it provides more accurate measurements of ionizing radiation exposure. TLDs operate based on the principle of storing energy from ionizing radiation in crystal form, which can then be released as light when heated. This process allows for precise quantification of the absorbed dose of radiation, making TLDs more reliable for monitoring radiation exposure, especially in environments where accurate dosimetry is crucial—for example, in healthcare settings with radiation therapy or diagnostic imaging. In contrast, film badges can degrade over time, are less sensitive at low doses, and may not provide a clear indication of the actual dose received in certain scenarios. TLDs, therefore, tend to be preferred for tasks requiring high measurement fidelity or where the precision of radiation dose is critical to ensure safety and compliance with regulations. While other options touch on various operational aspects, they do not directly address the measurement capability and accuracy that are paramount in radiation safety protocols.