if a patient received 2000 mrad during a 10 min fluoroscopic examination what was the dose rate?
- A- 0.2 rad / min
- B- 2.0 rad / min
- C- 5 rad / min
- D- 200 rad / min
The correct answer is A. 0.2 rad/min.
Here's how we can determine the dose rate:
- Convert mrad to rad:
We need to convert the given dose from millirads (mrad) to rads because options A-D are in rads per minute. There are 10 rads in 1 mrad. Therefore, 2000 mrad is equal to 2000 mrad * (10 rad/mrad) = 200 rad.
- Calculate the dose rate:
The dose rate is the total dose received divided by the time of exposure. In this case, the patient received 200 rad over a 10-minute fluoroscopic examination. Therefore, the dose rate is 200 rad / 10 minutes = 20 rad/min.
- Convert rad/min to smaller units:
To match the options, we need to convert the dose rate from rad/min to a smaller unit. Since there are 100 centirads (crad) in 1 rad, the dose rate is 20 rad/min * (100 crad/rad) = 2000 crad/min.
- Choose the matching option:
Option A (0.2 rad/min) is the closest match to the calculated dose rate of 2000 crad/min (which is equivalent to 0.2 rad/min).
Therefore, based on the calculations, the correct answer is A. 0.2 rad/min.
It's important to note that the actual dose rate during a fluoroscopic examination can vary depending on several factors, such as the type of procedure, the imaging equipment used, and the patient's anatomy.
