A group from Keio University and others has succeeded in developing a technology that uses optical fiber to make endoscopes thinner than injection needles. If put into practical use, it is expected to reduce the burden on patients during endoscopy of knee joints.

The developed endoscope is very thin, about 1.25 mm thick, so it can pass through the injection needle used for intravenous drips, etc., and can shoot high-resolution images. The group is aiming for practical use next year.