Fig. 8From: Clinical and experimental study of a terahertz time-domain system for the determination of the pathological margins of laryngeal carcinomaPCA 95% confidence ellipses of terahertz optical parameters for laryngeal carcinoma tissue, paracancerous tissue, and normal tissue (red represents laryngeal carcinoma tissue, blue represents paracancerous tissue, and green represents normal tissue). a Absorption coefficient and b refractive indexBack to article page