SPECT Brain Scan 1 (IMAGE) IOS Press Caption SPECT brain scans showing abnormal low blood flow in an NFL player compared to a normal healthy control subject. Credit University of California Los Angeles Medical Center, USA 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.