DANB Radiation Health and Safety (RHS) Practice Exam

The total radiation generated during dental radiographic exposure is determined by which variable?

1. MA

2. exposure time

3. kvp

4. millampere seconds

The correct answer is: millampere seconds

The total radiation generated during dental radiographic exposure is determined by milliamperes-seconds (mAs). This measurement combines both the tube current (milliamperes or mA) and the time of exposure (in seconds), reflecting the total amount of radiation produced during the imaging process. When you multiply the current (mA) by the exposure time (seconds), you get a direct indication of the quantity of x-rays generated. This is essential for ensuring that the radiographic image has sufficient density and contrast, while also minimizing patient exposure to unnecessary radiation. While both exposure time and mA influence the total radiation output, mAs provides a more comprehensive view by incorporating both aspects into a singular measure. Understanding this relationship is crucial for dental professionals in optimizing radiographic techniques for patient safety and effective imaging.