Clinical study using novel endoscopic system for measuring size of gastrointestinal lesion

Figure 2 Endoscopic image with a 5 mm wide grid (distance between objects: 10 mm, tilt angle: 30°). The pattern of a 1 mm square (black solid lines) was observed endoscopically (DBO: 10-40 mm, tilt angle: 0°-30°), and the 5 mm wide grid (white solid lines) was superimposed on the original image. The measurement errors (white arrows) were obtained by comparing the actual area (white dashed square line, size: 10 mm square) and four spots 5 mm away from the center of the grid (Upper, Lower, Right, Left). DBO: Distance between objects.