Nuclear magnetic resonance imaging

Nuclear magnetic resonance imaging (NMRI) is a powerful imaging modality having a range of important applications to medicine and industry. The basic principles of NMRI are reviewed in this paper. Particular emphasis is placed on developing the conceptual and mathematical basis for understanding three fundamental NMRI concepts, namely, spin density projection, phase encoding, and selective irradiation. The question of resolution in NMR imaging is discussed, and a brief presentation of chemical shift, spin relaxation time, and fluid flow velocity imaging is given.