This type of physiologically controlled imaging suppresses pulsation and flow artifacts. The pulse wave obtained with a finger sensor with a finger sensor is used as the trigger. Pulse sensors are more comfortable to use than ECG electrodes, but less precise.

See Pulse Length.

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.

RF pulse designed to rotate the macroscopic magnetization vector 90° 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 transverse magnetization and a FID. Also called P/2 Pulse.

Briefly applied magnetic field gradients.

See also Bipolar Gradient Pulse and Gradient Magnetic Field.