AUTHOR=Tei Lorenzo , Baranyai Zsolt TITLE=Editorial: The Chemistry of Imaging Probes JOURNAL=Frontiers in Chemistry VOLUME=6 YEAR=2018 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00253 DOI=10.3389/fchem.2018.00253 ISSN=2296-2646