American Society of Radiologic Technologist (ASRT) Practice Exam

What is the main advantage of the dose area product (DAP) meter?

1. It measures dose at the level of the collimator

2. It terminates exposure after a certain dose is reached

3. Technologists do not need to place it into the field

4. Regular calibration is required

The correct answer is: Technologists do not need to place it into the field

The main advantage of the dose area product (DAP) meter is that it provides a measurement of the radiation dose delivered to a specific area without the necessity for physical placement within the radiation field. This capability ensures that the measurement is accurate and can be taken without influencing the radiation dose distribution during a procedure. Using a DAP meter allows for assessments of radiation exposure to patients while eliminating the risk of the device interfering with the imaging process or receiving direct radiation. As such, this makes it a practical and efficient tool for radiologic technologists to utilize in clinical settings. Other aspects, while relevant to the operation and functionality of DAP meters, do not convey the same significant advantage. For instance, measuring dose at the level of the collimator or requiring regular calibration pertains to different aspects of the device's operation rather than highlighting its primary benefit. Terminating exposure after a certain dose is more aligned with specific safety protocols rather than the unique advantage offered by the DAP meter itself.