Table 2. Different I -SCAN modes and their functions.

Mode	Enhancement	Functionality
i-SCAN (Modes off)	SE/CE/TE -off	High definition white light endoscopy
i-SCAN 1	SE/TE	Sharpens surface vessels and enhances surface texture of mucosa
i-SCAN 2	SE, CE, TEc	Increases contrast between mucosa and blood vessels, enhances surface texture of mucosa
i-SCAN 3	SE, CE, TEg	Increases contrast between mucosa and blood vessel including dimly illuminated far-field regions, enhances surface texture of mucosa