Bloch equations
Equations describing nuclear magnetic resonance / From Wikipedia, the free encyclopedia
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For the wavefunction of a particle in a periodic potential, see Bloch's theorem.
In physics and chemistry, specifically in nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI), and electron spin resonance (ESR), the Bloch equations are a set of macroscopic equations that are used to calculate the nuclear magnetization M = (Mx, My, Mz) as a function of time when relaxation times T1 and T2 are present. These are phenomenological equations that were introduced by Felix Bloch in 1946.[1] Sometimes they are called the equations of motion of nuclear magnetization. They are analogous to the Maxwell–Bloch equations.