Tethered Capsule Endomicroscopy (image) Massachusetts General Hospital Caption By manipulating the plastic ball attached to the flexible tether (lower, right hand) the system operator can control the position of the endomicroscopy capsule in a patient's esophagus. Credit Michalina Gora, Ph.D., and Kevin Gallagher, Wellman Center for Photomedicine, Massachusetts General Hospital. 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.