QA-DWI Phantom (IMAGE) Center of Diagnostics and Telemedicine Caption DWI of the phantom with polyvinylpyrrolidone (PVP) solutions (b value 500 s/mm2). Credit Kristina Sergunova et al. 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.