Lung Clearance Index (IMAGE) National Jewish Health Caption Pulmonologists at the Center for Deployment-Related Lung Disease use a test called “lung clearance index” to non-invasively examine the extent of injury to the deepest and smallest airways in the lungs, which are particularly vulnerable to the combustion smoke and desert dust that military members were exposed to in Iraq and Afghanistan. Credit National Jewish Health Usage Restrictions All multimedia is available for free and unrestricted media use with courtesy to National Jewish Health License Original 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.