Warsaw University of Technology, Institute for Metrology and Biomedical Engineering, Warsaw, Poland.
Ultrasound Med Biol. 2010 Jul;36(7):1145-56. doi: 10.1016/j.ultrasmedbio.2010.04.008.
Determination of the mechanical properties of the myocardium is crucial for cardiac diagnosis. Cardiac strain and strain rate imaging may enable such quantification. To further develop these methodologies, an experimental setup allowing the recording of ultrasonic deformation data in a reproducible manner is necessary. Such setup with biventricular polyvinyl alcohol heart phantoms has been built. To test this setup, segmental longitudinal, radial and circumferential displacement, velocity, strain and strain rate in the phantoms were measured using a clinical ultrasound scanner and commercially available deformation imaging algorithms (based on both tissue velocity imaging and speckle tracking). The model deformation was close to that observed in the human left ventricular wall and was highly reproducible (e.g., the average peak longitudinal strain for the mid- and apical phantom segments equals -15.32 +/- 0.53% and -19 +/- 6% for the ventricle wall). The experimental setup is a valuable source of data for the development of algorithms for deformation estimation.
确定心肌的力学特性对于心脏诊断至关重要。心脏应变成像和应变速率成像是实现这种定量分析的方法。为了进一步开发这些方法，需要建立一种能够以可重复的方式记录超声变形数据的实验设置。已经建立了带有双心室聚乙烯醇心脏模型的这种设置。为了测试该设置，使用临床超声扫描仪和商用变形成像算法（基于组织速度成像和斑点跟踪）在模型中测量了节段性纵向、径向和周向位移、速度、应变和应变速率。模型变形与观察到的人类左心室壁变形非常接近，且具有高度可重复性（例如，中值和心尖段的平均峰值纵向应变为-15.32 +/- 0.53%和-19 +/- 6%，与心室壁相对应）。该实验设置是用于开发变形估计算法的有价值的数据来源。
