Skip to Content
Medical Term:



The effective T2 relaxation time, shorter than T2 because of magnetic field inhomogeneities; the observed time constant of free induction decay. In gradient echo images, contrast depends on T2*, whereas in sequences with a 180° rephasing pulse, the contrast depends on T2.


© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.