Among the non-destructive techniques capable of obtaining information on biological systems even in vivo, terahertz-based techniques are emerging due to their specificity to the water content, which can represent an important indicator of the presence of microorganisms and, in general, of the health status, particularly in plants. Nevertheless, the analysis of the extracted data (especially for images) and the exploitation of the potential of the technique for the study of the complex phenomena that occur in living tissues are still almost unexplored fields. In this work, the hydration status of leaves both in vivo and ex vivo was monitored continuously and non-destructively by acquiring videos in the sub-terahertz range through a portable imaging system. A model for describing the water flow in space and time in the midvein of a leaf is obtained which is suitable for the analysis of the data extracted from the portable sub-terahertz imaging system. These results show that terahertz-based technology can be used to study biological phenomena even in vivo; moreover, they pave the way for the introduction of a general method for the analysis of terahertz data based on surface fits in space and in time as well.

在能够获取生物系统信息（甚至在体内）的非破坏性技术中，基于太赫兹的技术由于其对水含量的特异性而正在兴起，水含量可以代表微生物存在的重要指标，并且一般而言，可以代表微生物存在的重要指标。健康状况，特别是植物的健康状况。然而，对提取的数据（尤其是图像）的分析以及利用该技术研究活体组织中发生的复杂现象的潜力仍然是几乎未经探索的领域。在这项工作中，通过便携式成像系统采集亚太赫兹范围内的视频，连续、非破坏性地监测体内和离体叶片的水合状态。获得了描述叶子中脉中水流在空间和时间上的模型，该模型适合对便携式亚太赫兹成像系统提取的数据进行分析。这些结果表明，基于太赫兹的技术甚至可以用于研究体内的生物现象；此外，它们为引入基于空间和时间表面拟合的太赫兹数据分析通用方法铺平了道路。