Connor Randall and Daniel Bridges (IMAGE) University of California - Santa Barbara Caption Co-inventors Connor Randall (left) and Daniel Bridges hold the instrument, which measures the bone material strength index. Credit UCSB 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.