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Nature Biotechnology 23, 983–987 (1 August 2005) | doi:10.1038/nbt1121

In vivo imaging platform for tracking immunotherapeutic cells

Eric T Ahrens , Rafael Flores , Hongyan Xu & Penelope A Morel

Cellular therapeutics show great promise for the treatment of disease, but few noninvasive techniques exist for monitoring the cells after administration. Here we present a magnetic resonance imaging (MRI) technology that uses perfluoropolyether (PFPE) agents to track cells in vivo.