Kristian Carlson, Wits University (IMAGE) University of the Witwatersrand Caption This is Dr. Kristian Carlson in the Microfocus X-ray Computed Tomography facility at Wits University. Credit WITS UNIVERSITY 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.