spinlatticerelaksaatio
spinlatticerelaksaatio (spin-lattice relaxation) is the process by which the net magnetization of nuclear spins returns to thermodynamic equilibrium along the external magnetic field after perturbation by a radiofrequency pulse. It is quantified by the longitudinal relaxation time, T1, which characterizes the exponential recovery of magnetization toward its equilibrium value M0.
The microscopic origin of spinlatticerelaksaatio depends on the environment and the spin system. In liquids, rapid
In measurement and applications, T1 is probed with inversion recovery, saturation recovery, or Look-Locker methods in
Typical values vary widely. At clinical MRI field strengths, tissue T1 times range from hundreds of milliseconds