TBIcheck (IMAGE) Université de Genève Caption One drop of blood is enough for TBIcheck to diagnose a possible mild brain trauma. If a line appears below the control line, the injured person will have to go to the hospital for a CT scan. Credit © UNIGE 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.