Zhang Xiaoming
Department of Radiology, Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN 55905, USA.
Med Eng Phys. 2017 Apr;42:111-115. doi: 10.1016/j.medengphy.2017.01.014. Epub 2017 Jan 31.
A surface wave elastography method is proposed to study the viscoelastic properties of skin by measuring the surface wave speed and attenuation on the skin. Experiments were carried out on porcine skin tissues. The surface wave speed is measured by the change of phase with distance. The wave attenuation is measured by the decay of wave amplitude with distance. The change of viscoelastic properties with temperature was studied at room and body temperatures. The wave speed was 1.83m/s at 22°C but reduced to 1.52m/s at 33°C. The viscoelastic ratio was almost constant from 22°C to 33°C. Fresh and decayed tissues were studied. The wave speed of the decayed tissue increased from 1.83m/s of fresh state to 2.73m/s. The viscoelastic ratio was 0.412/mm at the decayed state compared to 0.215/mm at the fresh state. More tissue samples are needed to study these viscoelastic parameters according to specific applications.
提出了一种表面波弹性成像方法，通过测量皮肤表面波速度和衰减来研究皮肤的粘弹性特性。在猪皮肤组织上进行了实验。表面波速度通过相位随距离的变化来测量。波衰减通过波幅随距离的衰减来测量。研究了在室温和体温下粘弹性特性随温度的变化。在22°C时波速为1.83m/s，但在33°C时降至1.52m/s。从22°C到33°C，粘弹性比率几乎恒定。研究了新鲜组织和腐烂组织。腐烂组织的波速从新鲜状态的1.83m/s增加到2.73m/s。腐烂状态下的粘弹性比率为0.412/mm，而新鲜状态下为0.215/mm。根据具体应用，需要更多组织样本以研究这些粘弹性参数。
