Figure 15. CT and MRI images of lesions of a vascular aetiology. CT brain of a 67-year-old woman who was a known hypertensive reveals a cerebellar and vermian bleed with an isodense component on the right side. The horizontal anterior margin of this component of the bleed suggests a probable gravity-dependent level. (a) T₁ weighted and (b) T₂ weighted images of an MR done 3 days later show a large cerebellar and vermian bleed. A fluid level and varying signal intensities within the bleed indicate blood products at different stages of degradation.