Fig. 2
From: Low-mass-ion discriminant equation (LOME) for ovarian cancer screening
Classification results for the reference mass spectrum. a Principal component analysis-based discriminant analysis. b Preliminary low-mass-ion candidates. DS, discriminant score; OVC, ovarian cancer; CRC, colorectal cancer; GC, gastric cancer; BUT, benign uterine tumor; BOT, benign ovarian tumor; PCL, precancerous cervical lesion; BRC, breast cancer; and BBT, benign breast tumor