Idiopathic Normal Pressure Hydrocephalus (IMAGE) University of Eastern Finland Caption Idiopathic normal pressure hydrocephalus is characterized by enlarged ventricles of the brain and obliterated parasagittal sulci. Credit University of Eastern Finland 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.