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用多普勒组织声像图的ＤＴＩ－ＰＷＤ技术对４４例健康志愿者左心室壁节段运动情况进行研究，将左心室壁分为１３个节段，对每一节段室壁运动频谱进行定量分析。结果显示正常人室壁运动频谱有其规律性，于心电图Ｑ波后出现等容收缩波（ＩＶＣ）和收缩波（Ｓ）；于心电图Ｔ波后出现等容舒张波（ＩＶＲ）、早期舒张波（Ｅ）、反相波（Ｒ）和晚期舒张波（Ａ）。且左室后壁、下壁、侧壁的Ｓ波、Ｅ波、Ａ波分别大于相对应的前间隔、前壁和后间隔的波群速度。所有室壁节段其Ｓ波平均为７．３１±０．８２ｃｍ／ｓ，Ｅ波为８．７４±２．３８ｃｍ／ｓ，Ａ波为５．７５±０．８８ｃｍ／ｓ。并且有８５．４７％的室壁节段其Ｓ波速度大于６ｃｍ／ｓ，有９８．９３％的室壁节段其Ｓ波速度大于５ｃｍ／ｓ。结果表明ＤＴＩ－ＰＷＤ可作为评价室壁节段运动速度直观、准确的定量手段。
The DTI-PWD technique of Doppler tissue was used to study the segmental motion of left ventricular wall in 44 healthy volunteers. The left ventricular wall was divided into 13 segments. The wall motion spectrum of each segment was evaluated Quantitative analysis. The results showed that the spectrum of normal human wall motion had its own regularity. IVC and S wave appeared after Q wave of electrocardiogram. After T wave of ECG, isovolumic diastolic wave (IVR), early diastolic wave (E), reversed phase (R) and late diastolic (A). And the S wave, E wave and A wave in the posterior wall, inferior wall and lateral wall of the left ventricle were larger than those of the corresponding anterior, anterior and posterior compartments, respectively. The mean S wave amplitude was 7.31 ± 0.82 cm / s for all wall segments, 8.74 ± 2.38 cm / s for E wave, and 5.75 ± 0.88 cm / s for A wave. And 85.47% of the wall segment S wave velocity greater than 6cm / s, 98.93% of the wall segment S wave velocity greater than 5cm / s. The results showed that DTI-PWD can be used as an intuitive and accurate quantitative method to evaluate the velocity of wall segment.