Topical Terminology > Rephasing
1 Definition
Rephasing
For Rephasing we have a term and definition in MRI.
Rephasing (MRI) 
The process of returning out-of-phase magnetic moments back into phase coherence. Caused either by rapidly reversing a magnetic gradient (Field Echo) or by applying a 180É RF pulse (Spin Echo). In the spin-echo pulse sequence this action effectively cancels out the spurious T2* information from the signal.
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