A radioisotope and its imaging have been powerful tools to explore the mechanism of chemical reaction and
the dynamic behavior of trace element in biomolecular science and nuclear medicine. This article reviews some labelled
compounds for radiopharmaceuticals in biochemical science and nuclear medicine using short-lived nuclides, the production
and applications of “Multitracer” containing carrier-free radionuclides of more than 50 elements and a new radioactive
tracer technique coupled with simultaneously imaging of multiple molecules labelled by γ-emitters. In addition, X-ray
phase imaging and microscopy technique using synchrotron radiation are introduced.
Keywords: Radioactive tracer, Labelled compounds, Nuclear reaction, Nuclear fragment, Multitracer, Carrier-free, γ-Ray
emission imaging (GREI), α-Emitter, Phase-contrast X-ray imaging, Synchrotron radiation.
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