Molecular imaging is a field of medical imaging that visualizes and quantifies biological processes at the molecular and cellular levels. This technology allows researchers and physicians to observe molecular pathways, interactions, and processes within the body in real-time. By using specific imaging probes that target molecules of interest, molecular imaging can provide valuable information about disease progression, treatment response, and drug effectiveness. This technology is used in various fields such as cancer research, neuroscience, cardiology, and drug development.