Answer :
Final answer:
The correct dosage of I-131 for a 55 kg patient, according to the given recommended dosage, is 231 μCi or 0.231 mCi, which corresponds to answer choice B.
Explanation:
To calculate the dosage of I-131 in millicuries for a patient weighing 55 kg given a recommended dose of 4.2 μCi per kg, you multiply the patient's body mass by the dosage per kilogram. Using the conversion factor that 1 mCi = 1000 μCi, the calculation is as follows: 55 kg × 4.2 μCi/kg = 231 μCi
Since the question asks for the dosage in millicuries, you need to convert μCi to mCi: 231 μCi ÷ 1000 = 0.231 mCi
Therefore, the correct answer is B) 231 μCi or 0.231 mCi.
