Palpation Capsule Demo (IMAGE) Vanderbilt University Caption The wireless palpation capsule, held in the gripper of a laparoscope, is tapped against a piece of silicone containing red marbles that simulate hidden tumors. Tapping the capsule in different areas builds up a map of tissue stiffness shown on the computer display that reveal the position of the marbles. Credit John Russell, Vanderbilt University Usage Restrictions None License Licensed content 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.