Evans, Medina, UT Southwestern Medical Center (image) UT Southwestern Medical Center Share Print E-Mail Caption Drs. Phil Evans (left) and Michael Medina, assistant vice president for health system imaging services, are overseeing the installation of the Aquillon One CT scanner. Credit UT Southwestern Medical Center Usage Restrictions With credit. 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.