ABSTRACT
This chapter provides an overview of a range of imaging techniques from molecular and cellular levels to the human brain, and focuses on the imaging techniques using light and electromagnetics. Imaging techniques have been rapidly developing and expanding in a variety of fields in medicine and biology. Historically, computed tomography and positron emission tomography, as well as ultrasonic imaging systems, have been introduced in the medical world as biomedical imaging tools, and these imaging tools have changed the medical world dramatically in modern medicine. Molecular imaging is a type of biomedical imaging that visualizes cellular functions or molecular processes inside the body. Probes used for molecular imaging are targeted to biomarkers for specific visualization of targets or pathways. Chemical exchange saturation transfer imaging requires a sufficiently slow exchange on the magnetic resonance time scale to allow selective irradiation of the protons of interest.
