MRI image foot post-COVID (IMAGE) Northwestern University Caption MRI of the foot in a patient with severe COVID-19. The grey part of the foot is devitalized tissue (gangrene). Credit Northwestern 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.