Terahertz Image of 17th Century Painting (IMAGE) Georgia Institute of Technology Caption This image shows reflected raw terahertz signals measured across the painting "Madonna in Preghiera" by the workshop of Giovanni Battista Salvi da Sassoferrato. Credit Courtesy of David Citrin 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.