Rapid development in the field of nanomedicine is bringing novel opportunities for improved disease diagnosis and drug delivery.Among various nanomaterials involved in nanomedicine,carbon nanotubes(CNTs) possessing a unique one-dimensional structure with interesting intrinsic mechanical,physical,and chemical properties have been extensively explored for a wide range of applications in biology and medicine.This review article provides an overview of how CNTs are used in different aspects of biomedicine including drug delivery and cancer treatment,bio-sensing,biomedical imaging,as well as tissue engineering.The recent developments,future perspective,and major challenges in this field are discussed.