This detailed book highlights recent advances in molecular imaging techniques and protocols, designed to be immediately applicable in global bio-laboratories. The chapters are categorized into seven major groups according to the reporter materials, such as imaging with passive optical readouts, activatable bioluminescent probes, functional substrates and luciferases, organic fluorescent probes, BRET probes, FRET probes, as well as with advanced instrumentation. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.