The gyromagnetic ratio, expressed in Larmor precession frequency f = γ γ 2 π π B , is of great relevance to nuclear magnetic resonance analysis. Some isotopes in the human body have unpaired protons or neutrons (or both, as the magnetic moments of a proton and neutron do not cancel perfectly) Note that in the table below, the measured magnetic dipole moments, expressed in a ratio to the nuclear magneton, may be divided by the half-integral nuclear spin to calculate dimensionless g -factors. These g -factors may be multiplied by 7.622 593 285 (47) MHz / T, which is the nuclear magneton divided by the Planck constant, to yield Larmor frequencies (in MHz/T). If divided instead by the reduced Planck constant, which is 2 π less, a gyromagnetic ratio expressed in radians is obtained, which is greater by a factor of 2 π.