Quantification of radicals in aqueous solution by positronium lifetime: an experiment using a clinical PET scanner
Sodai Takyu,
Ken-ichiro Matsumoto,
Tetsuya Hirade
et al.
Abstract:Positrons and electrons sometimes exist as the unstable species positronium (Ps) in living organisms. The time it takes for Ps to annihilate represents the Ps lifetime and it varies depending on the surrounding electron density. The Ps lifetime may add new biological information to PET scan information. To discuss the feasibility of quantifying (free) radicals in vivo by the Ps lifetime, we used a clinical PET system to make Ps lifetime measurements in aqueous solutions containing radicals. The results suggest… Show more
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