Alpha particles have a quality factor of 20. If a patient receives a dose of alpha particles at a rate of 10 mGy.h-1 for a period of 30 minutes, what is the equivalent dose that the patient receives?(Hint: There are 2 parts to this calculation. See page 296 of your textbook for a further hint if needed.)Group of answer choices5 mSv5 mGy0.1 Gy6 Sv0.1 Sv0.2 Sv
Question
Alpha particles have a quality factor of 20. If a patient receives a dose of alpha particles at a rate of 10 mGy.h-1 for a period of 30 minutes, what is the equivalent dose that the patient receives?(Hint: There are 2 parts to this calculation. See page 296 of your textbook for a further hint if needed.)Group of answer choices5 mSv5 mGy0.1 Gy6 Sv0.1 Sv0.2 Sv
Solution
The equivalent dose (H) can be calculated using the formula:
H = D * Q
where D is the absorbed dose and Q is the quality factor.
First, we need to calculate the absorbed dose. The patient receives a dose of 10 mGy per hour for 30 minutes, which is half an hour. Therefore, the absorbed dose is:
D = 10 mGy/h * 0.5 h = 5 mGy
Next, we convert the absorbed dose from mGy to Gy by dividing by 1000 (since 1 Gy = 1000 mGy):
D = 5 mGy / 1000 = 0.005 Gy
Finally, we calculate the equivalent dose by multiplying the absorbed dose by the quality factor:
H = D * Q = 0.005 Gy * 20 = 0.1 Sv
So, the equivalent dose that the patient receives is 0.1 Sv.
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