OCT Scanner and Biofilm (image) The Optical Society Caption This is a schematic and picture of a handheld scanner doctors can use to monitor biofilms in the ear. It also shows a picture of a healthy middle ear and one covered with a biofilm. Credit See image. Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.