Abstract: DEVELOPMENT OF 99Tcm LABELLED CENTRAL NERVOUSSYSTEM(CNS) RECEPTOR IMAGING AGENTS Hu Ji He Youfeng Wang Yishang Xiao Lun(Department of Isotope, China Institute of Atomic Energe, Beijing 102413)ABSTRACTThe use of CNS receptor imagings and basic requirements for their imaging agents are reviewed. The labelled methods and the current state of development in CNS receptor imaging agents based on 99Tcm in recent years are introduced. Key words 99Tcm labelling CNS receptor imaging radiopharmaceuticals