If a patient received 0.2 Gy during a 5-minute fluoroscopic examination, what would be the dose rate?

To find the dose rate from the given information, you need to divide the total dose received by the duration of the exposure. In this case, the patient received a total dose of 0.2 Gy during a 5-minute examination.

First, convert the total dose from Gy to mGy, since the answer choices are in mGy/min. There are 1000 milliGray (mGy) in 1 Gray (Gy), so:

0.2 Gy = 0.2 x 1000 mGy = 200 mGy

Now, to find the dose rate, divide the total dose (200 mGy) by the exposure time in minutes (5 minutes):

Dose Rate = Total Dose / Time

Dose Rate = 200 mGy / 5 min = 40 mGy/min

Therefore, the correct dose rate is 40 mGy/min, which aligns with the answer choice that states 40.0 mGy/min. This calculation illustrates how to derive the dose rate based on the total exposure and time during fluoroscopic procedures, which is critical in understanding radiation dosimetry in a clinical setting.