[A study on the new measurement of gastric lesions with an electronic endoscope]

We carried out measurement of gastric lesions in the inner surface of the stomach with a measuring system, which is composed of a stereo endoscope and a personal computer. Basically, the length on a flat board from 10 mm to 50 mm was measured by varying the distance between the lens and the board and the angles of the endoscope at first. The error of the measurement was less than 8.5%. Secondly, ten physicians of our clinic attempted the measurement of the pasted discs on the inner wall of a stomach model with the endoscope. The average measurement error and the average time required for endoscopy became more better using the newly developed system than a measuring rod. Clinically, we measured the length of stomach lesion and of normal mucosa in six patients and compared the values obtained with those of resected fresh specimens. The length of stomach lesions could be measured more accurately than that of normal mucosa of stomach. From our observations, it can be said that this system is as available as the basic examination procedures in use at present and worth using in clinical procedure for it's high reliability.