Skip to Content
Medical Term:

longitudinal relaxation


Definition: in nuclear magnetic resonance, the return of the magnetic dipoles of the hydrogen nuclei (magnetization vector) to equilibrium parallel to the magnetic field, after they have been flipped 90°; varies in rate in different tissues, taking up to 15 s for water.

See: TI

Synonym(s): spin-lattice relaxation, spin-spin relaxation

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.