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Fluorine-18 Is an Isotope Used in Positron Emission Tomography (PET)to

Question 108

Multiple Choice

Fluorine-18 is an isotope used in Positron Emission Tomography (PET) to scan the brain.If a researcher has 1.50 μg of 18F,how long before it decays to 1.0 ng? The half-life of 18F is 109.8 minutes.


A) 5.2 × 10-2 hr
B) 4.6 × 10-2 hr
C) 19 hr
D) 51 hr

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