MAGNETIC RESONANCE IMAGING REQUIRING LONG WAITING TIME BETWEEN PRE-PULSES AND IMAGING PULSE TRAIN

摘要

In the black blood method using double-inversion pulses, the image of a heart during a systole of the cardiac cycle period is reliably produced even if the heartbeat fluctuates in every cycle. There is used a pulse sequence of the black blood method which is composed of a double-inversion pulse (DIV) and an imaging pulse train (SEQima). This sequence is applied in synchronism with an ECG signal of an object thereby to do the magnetic resonance imaging. The double-inversion pulse (DIV) is applied in synchronism with an R wave: R1 appear at a timing of the ECG signal with a first delay time (td1) (fixed value). The imaging pulse train (SEQima) is applied in synchronism with the next R wave: R2 with a second delay time (td2) (fixed value: matching the systole). The fluctuation of the cardiac cycle is absorbed for an inversion time (BBTI).