Oxygen-15 Is A $\beta$ + Emitter That Is Often Used in PET Scans

question 10

Multiple Choice

Oxygen-15 is a $\beta$ + emitter that is often used in PET scans.It has a half-life of 122 seconds.Calculate how long it takes for the patient's initial activity to be reduced by a factor of 100.

• A)203 mins
• B)1.22 \(\times\) 10⁴ mins
• C)13.5 mins
• D)8.13 mins
• E)None of these is correct.

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