Three-Dimensional Dielectric Imaging with Microwave Frequency Sweeping

本项目将对三维技术进行研究。 通过频率扫描的微波散射的傅立叶映射。 的 研究可能会导致电介质成像系统的开发 评估和医疗诊断。 虽然存在许多成像 技术，介电剖面的直接成像目前是 不可用. 人体成像的微波剂量是 预计将在每克微瓦到几十瓦的数量级上， 微瓦每克，比普通的 建议的安全水平。 图像将提供电介质 目标的轮廓，分辨率为约3毫米，在每个 三维空间 由于电介质的敏感性， 相对于各种生物组织的介电常数，该方法 影像学检查应提供肿瘤和正常之间更大的对比度 比其他成像技术。 该技术也可能是 可用于其他材料的非侵入性评估， 或者在其他物理参数的映射中， 比如温度或压力。

This project will perform research on a technique of three.dimensional fourier mapping of microwave scattering by frequency sweeping. The research could lead to development of an imaging system for dielectric evaluation and for medical diagnosis. While there exist many imaging techniques, direct imaging of dielectric profiles is currently unavailable. The microwave dose for imaging of the human body is expected to be on the order of microwatts per gram to tens of microwatts per gram, which is two to three orders of magnitude below the recommended safety level. The image will provide a dielectric profile of the target with a resolution of about 3 mm in each of the three dimensions. As a result of the sensitivity of dielectric permittivity with respect to various biological tissues, this method of imaging should provide greater contrast between tumor and normal tissues than other imaging techniques. The technique might also be useful for non.invasive evaluation of other materials where dielectric profile is needed, or in the mapping of other physical parameters such as temperature or pressure.