Figure 9. CT and MRI images in lesions of a vascular aetiology. A haemorrhagic venous infarct presents as a thin-walled cystic lesion with a blood–fluid level in the deep right cerebral hemisphere. There is subfalcine herniation with gross distortion of a blood-filled ventricular system. A CT venogram of a 23-year-old man revealed evidence of thrombosis of the superior sagittal sinus (not shown).