医用棉纱布的太赫兹波段透射特性

Transmission characteristics of medical cotton gauzes in terahertz region

摘要:

生物医学诊断是太赫兹成像的重要应用领域。利用透射式太赫兹时域光谱(THz-TDS)在实验室温湿度条件下研究了用于伤口覆盖的医用棉纱布在0.1 THz?1.34 THz波段的透射特性。结果表明，在该波段，纱布对太赫兹辐射具有良好的透过性，且随频率增加，透射率迅速下降。利用最小二乘拟合得到太赫兹波透射率和纱布层数关系曲线，相关系数达0.996，并由此获得0.37 THz处0.34 mm厚单层纱布对太赫兹波的透射衰减系数约为0.159 7。本研究表明太赫兹光谱成像是包扎情况下烧伤评估、伤口恢复期监测的有效临床工具。

Abstract:

Biomedical diagnosis is an important application of terahertz imaging. The transmission properties of medical cotton gauzes as wound cover under 0.1 THz-1.34 THz are characterized by a transmission Terahertz Time-Domain Spectroscopy(THz-TDS). Results indicate that gauzes exhibit good transmission performance in researched waveband; and the power transmittance rapidly decreases with the increase of frequency. The fitting curve of THz power transmittance vs. layer numbers of gauzes is obtained with a correlation coefficient of 0.996 by using the least square fitting; from which, a transmission attenuation coefficient of 0.159 7 is obtained for a single layer of gauze with 0.34 mm thickness at 0.37 THz. This research shows that terahertz spectral imaging can be used as a powerful clinical tool for burn evaluation and wound healing progress monitoring.