Gradient - Moment 09 May 2026

: Prevents "ghost" artifacts in the phase-encoding direction caused by moving blood or CSF.

GMN, also known as , involves adding extra gradient pulses (lobes) to a pulse sequence to ensure that moving spins do not accumulate a net phase by the time the echo is formed. Gradient - Moment 09

: Additional gradient lobes are designed so that the "first moment" (the integral of gradient strength over time multiplied by time) equals zero at the echo time. Result : : Prevents "ghost" artifacts in the phase-encoding direction