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Fig. 1 | BMC Gastroenterology

Fig. 1

From: Evaluation of dual-wavelength excitation autofluorescence imaging of colorectal tumours with a high-sensitivity CMOS imager: a cross-sectional study

Fig. 1

Representative autofluorescence ratio image. Autofluorescence images were obtained with a high-sensitivity CMOS imager by irradiating the resected specimen with 405-nm followed by 365-nm excitation light. The ratio images were then created by dividing the F365ex (365 nm) by F405ex (405 nm). a. Colon tumour observed during endoscopy. b. Fresh resected specimen. c. Autofluorescence image at 365-nm excitation (F365ex). d. Autofluorescence imaging at 405-nm excitation (F405ex). e. The calculated ratio image. f. Resected formalin-fixed specimen

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