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Fluorine-18 Undergoes Positron Emission with a Half-Life of 1

Question 84

Multiple Choice

Fluorine-18 undergoes positron emission with a half-life of 1.10 × 102 minutes.If a patient is given a 248 mg dose for a PET scan,how long will it take for the amount of fluorine-18 to drop to 83 mg? (Assume that none of the fluorine is excreted from the body.)


A) 99 minutes
B) 1.74 × 102 minutes
C) 1.32 × 102 minutes
D) 3.00 × 102 minutes
E) 2.11 × 102 minutes

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