Wood Sample (IMAGE) Optica Caption Using their terahertz tomography approach, the researchers produced surface models of wood samples that were insect infested (a) and not infested (b). The cross sections on the bottom were reconstructed from the areas marked with a white dashed line in (a) and (b). Credit HAWK University of Applied Science and Arts 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.