Researchers at the RIKEN Center for Life Science Technologies have developed a semiconductor Compton camera for simultaneous imaging of bio-metal radiotracers and molecular PET tracers. The new gamma-ray emission imaging system, or GREI-II, was first tested in live mice by collecting images of cancers with copper-64 and zinc-65 radiotracers, according to findings published in the Journal of Analytical Atomic Spectrometry. "The half-lives of the molecular imaging agents for PET are very short. To realize the simultaneous and efficient imaging of the PET agents and bio-metal tracers, we had to improve the sensitivity of the camera and the speed of data processing," said researcher Shinji Motomura.

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