How does it differ from MRI (magnetic resonance imaging)?
In NMR, the signal is converted to spectra, whereas in MRI, the signal is converted to an image of concentration distribution. In NMR the analysis is performed in a homogeneous magnetic field that yields a consistent spectral position for given proton chemistries. In MRI the analysis is performed by imposing magnetic field gradients at the sample thus yielding spectral positions that are related to spatial location for the same proton chemistry.
