What are some other common MRS terms?
FID (Free Induction Decay): This is the name given to the signal recorded after a single RF field pulse. Its called a free induction decay because they are freely precessing, inducing a current into the coil, and their signal is decaying. Nutation Angle: The amount of rotation away from B0 caused by the B1 field. In NMR jargon, it is sometimes called the flip angle. Pulse Sequence: The sequence of RF pulses used to generate desired signal characteristics. NEX (Number of Excitations): The number of times the pulse sequence is repeated, for purposes of signal averaging. TR (Repetition Time): The time between individual repetitions of the pulse sequence. Partial Saturation: Applies to acquisitions in which NEX > 1. If the TR < (5T1), the spin system will not fully recover from a pulse, and is said to be partially saturated. All other things being equal, the overall signal will be reduced relative to the full longitudinal relaxation (5T1) condition. Ernst Angle: The nutation angle that opt
