See Pulse 180°.

Sequential line imaging technique utilizing two orthogonal oscillating magnetic field gradients, a SFP pulse sequence, and signal averaging to isolate the NMR spectrometer sensitivity to a desired line in the body.

RF pulse designed to rotate the macroscopic magnetization vector 180° in space as referred to the rotating frame of reference, usually about an axis at right angles to the main magnetic field. If the spins are initially aligned with the magnetic field, this pulse will produce inversion. Also called P Pulse.

Adiabatic RF pulses are amplitude and frequency modulated pulses that are insensitive to the effects of B1-inhomogeneity and frequency offset (conventional RF pulses used in MRI are only amplitude modulated). Due to an extended application time adiabatic RF pulses are mostly used in NMR imaging applications.

A sequence of two or more pulses with a null response at a particular frequency used to suppress the water signal in localized proton spectroscopy.