1. Date of download: 7/8/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Comparison of MRI and CT for Detection of Acute Intracerebral Hemorrhage JAMA. 2004;292(15):1823-1830. doi:10.1001/jama.292.15.1823 Example of acute intraparenchymal hematoma imaged at 1 hour 54 minutesfrom symptom onset with computed tomography (A, white arrowhead) and at 1hour 12 minutes from symptom onset with magnetic resonance imaging (B, gradientrecalled echo [GRE] image, black arrowhead). Figure Legend:

2. Date of download: 7/8/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Comparison of MRI and CT for Detection of Acute Intracerebral Hemorrhage JAMA. 2004;292(15):1823-1830. doi:10.1001/jama.292.15.1823 Computed tomography (CT) and magnetic resonance (MR) images from representativeaxial slices from 2 patients (A,B) in whom hemorrhage was visualized on MRI,but not CT, by our consensus panel. For each patient, the left panel showsthe CT image, the middle panel shows the corresponding gradient recalled echo(GRE) image, and the far right panel shows the diffusion-weighted images (DWI).In each case, hemorrhagic transformation was visualized on GRE (black arrowheads)occurring within regions of ischemia (yellow arrowheads) visualized on DWIscan. Hypointensity on GRE indicates susceptibility induced signal loss dueto hemorrhage. Figure Legend:

3. Date of download: 7/8/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Comparison of MRI and CT for Detection of Acute Intracerebral Hemorrhage JAMA. 2004;292(15):1823-1830. doi:10.1001/jama.292.15.1823 Computed tomography (CT) and magnetic resonance (MR) images from representativeaxial slices from 2 patients (A,B) in whom hemorrhage was visualized on CT,but not interpreted as acute blood on MRI, by our consensus panel. For eachpatient, the left panel shows the CT image, the middle panel shows the correspondinggradient recalled echo (GRE) image, and the right panel shows the diffusion-weightedimage (DWI). In patient 3, the hemorrhage is apparent on CT as a hyperdenselesion (white arrowhead). A corresponding hypointensity is marked on the GRE(black arrowhead) and on the DWI image (yellow arrowhead). In this patient,the MRI lesion was recognized as blood but was interpreted as chronic, notacute, hemorrhage. In patient 4, a left frontal lesion is interpreted as subarachnoidblood on CT (white arrowhead). This lesion is apparent on the GRE sequence(black arrowhead) but was interpreted as blood by only 1 of 4 members of ourpanel. The corresponding DWI image shows hyperintensity indicative of acuteischemia within the left anterior cerebral artery territory (yellow arrowheads). Figure Legend:

4. Date of download: 7/8/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Comparison of MRI and CT for Detection of Acute Intracerebral Hemorrhage JAMA. 2004;292(15):1823-1830. doi:10.1001/jama.292.15.1823 Multiple subcortical microbleeds are not identified as old hemorrhageon computed tomography (CT) (panel A). Representative axial slices from gradientrecalled echo (GRE) sequence demonstrating the microbleeds (panel B, blackarrowheads); in addition to an acute cerebellar hemorrhage (panel C, blackarrowhead). Acute intraventricular hemorrhage is seen in the left occipitalhorn on both MRI and CT. Figure Legend: