METHOD TO REDUCE ARTEFACTS IN THE MAGNETIC RESONANCE IMAGE DUE TO SPURIOUS MAGNETIC SIGNALS

摘要

In a magnetic resonance imaging method first a preparatory excitation of spins is applied and subsequently a temporary magnetic compensation gradient is applied in a direction opposite a phase-encoding direction. Thereafter an RF-excitation pulse is generated and a phase-encoding gradient is applied in the phase-encode direction. Finally magnetic resonance signals are received during an acquisition interval. Artefacts in the magnetic resonance image due to magnetisation spuriously generated by the preparatory excitation are avoided.