[15p-D311-1~14] 2.4 Medical application

[15p-D311-7] Quantum PET Research: Positron Lifetime Measurement Using ¹²⁴I

〇Sodai Takyu¹, Hayato Ikeda^2,3, Hidekatsu Wakizaka¹, Ken-ichiro Matsumoto¹, Fumihiko Nishikido¹, Hideaki Tashima¹, Miwako Takahashi¹, Hiroshi Watabe², Taiga Yamaya¹ (1.QST, 2.CYRIC, Tohoku Univ., 3.ELPH, Tohoku Univ.)

Keywords:Positron emission tomography, Quantum PET, Positron lifetime measurement

In this study, we focused on the nuclide ¹²⁴I, which is available on the Supply Platform of Short-lived Radioisotopes, and investigated its potential use for the new concept "quantum PET", which is diagnostic imaging using ortho-positronium (o-Ps) lifetime. A pair of PET detectors measured ¹²⁴I aqueous solutions with different electron densities. We compared the timing spectra treating 603 keV prompt gamma-ray detection as the start and the 511 keV photon detection as the stop. There was a negative correlation between the electron density in the ¹²⁴I aqueous solution and o-Ps lifetime. We showed that the PET detectors could detect the correlation.