High power laser production of short-lived isotopes for positron emission tomography

Positron emission tomography (PET) is a powerful diagnostic/imaging technique requiring the production of the short-lived positron emitting isotopes 11 C, 13 N, 15 O and 18 F by proton irradiation of natural/enriched targets using cyclotrons. The development of PET has been hampered due to the size and shielding requirements of nuclear installations. Recent results show that when an intense laser beam interacts with solid targets, megaelectronvolt (MeV) protons capable of producing PET isotopes are generated. This report describes how to generate intense PET sources of 11 C and 18 F using a petawatt laser beam. The work describing the laser production of 18 F through a (p,n) 18 O reaction, and the subsequent synthesis of 2-[ 18 F] is reported for the first time. The potential for developing compact laser technology for this purpose is discussed.