David Citrin, Georgia Institute of Technology (image) Georgia Institute of Technology Share Print E-Mail Caption Georgia Tech professor David Citrin is shown with images produced by a terahertz imaging technique. Researchers studied a 17th century painting using a terahertz reflectometry technique to analyze individual paint layers. Credit John Toon, Georgia Tech 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.