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in nuclear magnetic resonance, the ratio of the magnetic dipole moment of the nucleus to the nuclear spin angular momentum; the gyromagnetic ratio is a unique value for each type of nucleus.
Synonym(s): magnetogyric ratio
gyromagnetic ratio (γ)
a value characteristic of any magnetic nucleus that determines the Larmor frequency, fL, in a given magnetic field B (fL= γB).
gyromagnetic ratioAn MRI term for a constant for a given nucleus which links the nuclear MR frequency to the strength of the external magnetic field, and corresponds to the ratio of the magnetic moment (field strength) to the angular momentum (frequency) of a particle. The value of the gyromagnetic ratio for hydrogen (1H) is 4,258 Hz/G or 42.58 MHz/Tesla.
gy·ro·mag·net·ic ra·ti·o(ji'rō-mag-net'ik rā'shē-ō)
The precessional frequency of an element at 1.0 tesla.