CAMRT Radiography Practice Exam

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What does a TLD measure when it is worn under a lead apron?

Effective dose
Exposure dose
Accidental dose
Absorbed dose

The correct answer is: Absorbed dose

A thermoluminescent dosimeter (TLD) measures the absorbed dose of radiation when worn under a lead apron. The lead apron is used to shield the individual from any potential radiation exposure during imaging procedures. The TLD detects the amount of radiation energy absorbed by the tissues, indicating how much radiation has penetrated the lead apron and impacted the individual. While effective dose considers the biological effects based on radiation type and sensitivity of tissues, and exposure dose relates to the amount of radiation in the air, neither of these reflects the specific measurement taken by a TLD under the apron. Accidental dose typically refers to unexpected or incidental exposure, which isn't the focus of what a TLD would measure in this context. Thus, the TLD is specifically focused on assessing the absorbed dose, making it the correct answer in this scenario.