Basic concepts# Summary Pharmacokinetics Definitions and notations Indicator transit times Trap Pass Compartment Plug flow Chain Plug-flow compartment Step Free N-compartment system 2-compartment exchange Non-stationary compartment Michaelis-Menten compartment Relaxation Definitions and notations Longitudinal relaxation Transverse relaxation Signals Definitions and notations Spoiled gradient-echo steady state Spoiled gradient-echo outside the steady state Optimization Inversion