Original and Terahertz Images of Cross (IMAGE) Georgia Institute of Technology Caption Comparison of the inscription on (a) the original cross before corrosion removal, (b) the final terahertz image after post-processing, and (c) the cross after corrosion removal. Credit Georgia Tech-Lorraine Usage Restrictions n/a 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.