“How long are you radioactive after a PET scan?”
I am a 50 year old male. I want to know how long are you radioactive after a PET scan?
3 Answers
RadiologistRadiologist
Technically, about 9 hours....5 half-lives of the F-18 (I presume that's your agent). The half-life of F18 is 110 minutes. A simpler answer would be 12 hours.
All the best.
All the best.
Fludeoxyglucose F 18 has a half life of 109.7 minutes. Therefore, at 219.4 minutes, there is only 25% residual activity, and at 329.1 minutes, there is only 12.5% residual activity.
Half-life of F-18 is about 2 hours. 8 half-lives, or 16 hours would leave only a minimal amount of radiation.
