If a radiographer is exposed to 0.93 mGya/h for 15 minutes, what will be the total occupational exposure?

• A. 0.125 mGy
• B. 0.2325 mGy
• C. 0.500 mGy
• D. 0.4125 mGy

Answer: (B)

To determine the total occupational exposure, we start by converting the exposure rate from milliGray per hour (mGya/h) to a total exposure over the specified time period. The exposure rate is given as 0.93 mGya/h, and the exposure duration is 15 minutes.

First, we need to convert the exposure time from minutes to hours because the exposure rate is provided in hours. Since there are 60 minutes in an hour, 15 minutes is equivalent to:

15 minutes × (1 hour / 60 minutes) = 0.25 hours.

Now, we calculate the total exposure by multiplying the exposure rate by the time in hours:

Total exposure = Exposure rate × Time

Total exposure = 0.93 mGya/h × 0.25 hours = 0.2325 mGy.

This calculation shows that the total occupational exposure over the 15 minutes at the given exposure rate is 0.2325 mGy, which means that this amount accurately reflects how much radiation the radiographer has been exposed to during that period of time. Thus, option B is correct.