图7. 应用于不均匀磁场下的高分辨2D J-编辑谱方法. (a)基于3D采样的HR-G-SERF实验序列，相位循环：Φ₁ (x, -x), Φ₂ (x), Φ₃ (x, x, y, y, -x, -x, -y, -y), Φ_rec (x, -x, -x, x). (b)基于2D快速采样的AH-G-SERF实验序列，由ZS模块和G-SERF回波链模块组成设计的，相位循环：Φ₁=Φ₂=Φ₃=Φ_rec=x，Φ₄在J编辑回波链采样模块中以(x, x, x, x, -x, -x, -x, -x)_N/2为循环.细绿色长条和粗绿色长条分别表示π/2和π非选择性脉冲，蓝色和红色填充形状表示的分别是用于选择特定质子和空间编码的π选择性脉冲；G_z为空间编码的弱梯度，G₁、G₂、G₃和G₄为相干选择梯度(摘自文献[53])

Fig.7. High-resolution 2D J-edited spectroscopy applied in inhomogeneous magnetic fields. (a) HR-G-SERF sequence based on 3D acquisition. Phase cycling: Φ₁ (x, -x), Φ₂ (x), Φ₃ (x, x, y, y, -x, -x, -y, -y), Φ_rec (x, -x, -x, x). (b) AH-G-SERF sequence based on accelerated 2D acquisition from the combination of ZS and G-SERF echo-train acquisition modules. Phase cycling: Φ₁=Φ₂=Φ₃=Φ_rec=x, and Φ₄ is set as a phase array of (x, x, x, x, -x, -x, -x, -x)_N/2 in the J-edited echo-train acquisition module. Thin and fat green bars represent π/2 and π nonselective pulses. Blue and red shaped pulses indicate π selective pulses applied for inversing selected proton and spatial frequency encoding, respectively. G_z denotes the weak gradient for spatial frequency encoding. G₁, G₂, G₃, and G₄ are coherence-selection gradients (Excerpted from Ref.[53])