transverse magnetisation

transverse magnetisation

An MRI term for a component of the net magnetisation vector located at right angles to the main magnetic field. Precession (gyration) of the transverse magnetisation at the Larmor frequency generates the detectable NMR signal. Without externally applied radio frequency energy, transverse magnetisation decays to zero with a characteristic time constant of T2, or more strictly T2*. The transverse magnetisation value drops from maximum to about 37% of its original value in a time T2.
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proposed the application of balanced steady-state free precession (bSSP) for the significantly higher frequency for anatomy based resonance as compared to gradient echo (GE), which scarifies the certain amount of sensitivity and CNR as a result of spoiling of transverse magnetisation.
In CSE and FSE, most favourable TE is required to induce the maximum signal in the coil prior to the decay of transverse magnetisation.
This decay of the transverse magnetisation depends on the biological behaviour of the tissue.

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