图5. (a) 单层激发和(b)多层激发的OPAM-2DJ实验的脉冲序列示意图.该序列由纯化学位移ZS模块和回波链J采样模块组成.绿色填充代表π/2和π非选择性脉冲；红色填充代表单色π脉冲；黄色填充代表多色π/2和π脉冲；G_z为与空间选层脉冲相匹配的弱梯度；G₁、G₂、G₃和G₄是相干选择路径梯度；Φ_{m, n}为附加的傅里叶编码相位；序列的相位为：Φ₁ (x, -x)、Φ₂ (x)、Φ₃ (x, x, y, y, -x, -x, -y, -y)、Φ_rec (x, y, y, x)；Φ₄在回波链J采样模块中，遵循(x, x, -x, -x)的相位(摘自文献[47])

Fig.5. Pulse sequences for (a) single-band and (b) multi-band OPAM-2DJ experiments. The sequence is constituted of ZS and echo-train J acquisition modules. Green bars denote π/2 and π nonselective pulses, respectively. The red-shaped pulse represents monochromatic π pulse. The yellow-shaped pulses represent polychromatic π/2 and π pulses. G_z indicates the weak gradient for extracting spatial slice-selective signals; G₁, G₂, G₃, G₄ are used for coherence pathway selection. Φ_{m, n} is the appended Fourier encoding phase. Phase cycling: Φ₁ (x, -x), Φ₂ (x), Φ₃ (x, x, y, y, -x, -x, -y, -y), Φ_rec (x, y, y, x). Φ₄ is varied as (x, x, -x, -x) in the echo-train J acquisition module (Excerpted from Ref. [47])