Abstract #4421

Clinical Significance of Ischemic Hypointense Findings in Vessels and Tissue in Gradient Echo T2*-Weighted Images at 3 Tesla Evaluated by Simple Visual Estimation in Stroke Patients Treated with Intravenous Rt-PA

Masafumi Harada¹, Hitoshi Kubo¹, Naomi Morita², Hiromu Nishitani², Tsuyoshi Matsuda³

¹Department of Medical Imaging, Univeristy of Tokushima, Institute of Health Biosciences, Tokushima City, Tokushima, Japan; ²Department of Radiology, Univeristy of Tokushima, Institute of Health Biosciences, Tokushima City, Tokushima, Japan; ³GE Healthcare Japan, Hino, Tokyo, Japan

The purpose of this study was to determine the clinical significance of Ischemic vessels (IschV) and tissue (IschT) signs in gradient echo T2*-weighted images (Gre T2*-WIs) and the correlation of clinical outcome with visual recognition of these signs. The current study may indicate that IschT sign in Gre T2*-WI at 3 tesla would include more severe ischemia than IschV sign and is therefore a candidate for determination of risk for deteriorated outcome with Gre T2*-WI at 3 tesla.