Imaging of Epithelial Cancer in Sub-Terahertz Electromagnetic Wave.

We used sub-terahertz (THz) imaging to exam two cross sections of epithelial cancer tissue embedded in paraffin using a 0.19 THz electromagnetic wave. The sub-THz imaging system was constructed with a tunnel injection transit time (TUNNETT) diode, a Schottky barrier diode detector and a X-Z stage. We examined the difference between a sub-THz wave absorption in melanoma and nevus tissue