英文: 门控 (gated), 反门控去耦 (inverse gated decoupled).
把脉冲序列分成三部分:
relaxation time, pulse, acquisition
门控去耦 relaxation time 段照射去耦
反门控去耦: acquisition 段照射去耦.
照射去耦的影响:
relaxation time 段: 决定峰是否裂分 (去耦则单峰, 否则为耦合裂分峰)
acquisition 段: 决定峰的强度 (有去耦则 noe 增强 sensitivity, 没有去耦则不增强)