T2*

T2*

An MRI term for the time constant for the loss of phase coherence among spins oriented at an angle to the static magnetic field, which is due to a combination of magnetic field inhomogeneities and spin-spin relaxation, resulting in a rapid loss of transverse magnetisation and the MRI signal. The value of T2* is < T2.
References in periodicals archive ?
Intra-tumor microcalcification, hemorrhage, or other T2* change such as macrophage and free radical of NIPT may be related to relative low signal intensity on T2-weighted images.
The aim of this study is to explore the possibility of T2* weighted images (T2*WI) as another sequence in addition to T1WI to determine the process of bone fusion of the radial epiphysis and explore new findings.