Value of screening endoscopy in evaluation of esophageal, gastric and colon cancers

Figure 3 Autofluorescence imaging’s limited role in certain lesions and benefit in others. A: White light imaging (WLI) displays a red lesion with a slightly depressed area on the bottom right corner (white arrow); B: Autofluorescence imaging (AFI) does not demonstrate a distinct lesion that can be ruled neoplastic; C: WLI made it difficult for the endoscopists to identify the isochromatic flat lesion: D: AFI displays a well-marked lesion with slightly raised borders (white arrows)[50].