Lab-on-a-Chip (image) Purdue University Share Print E-Mail Caption A device uses sound waves to detect the stiffness of an extracellular matrix, a structural network that contains cells. Changes in the stiffness of this structure can indicate the spread of disease. Credit Purdue University photo/Kayla Wiles Usage Restrictions None Share Print E-Mail 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.