Right temporoparietal haematoma demonstrates mildly hyperintense T1, heterogeneous T2 and hypointense EPI signal consistent with blood product. Abnormal DWI signal within the lesion is due to blood product. No other diffusion restriction. There is surrounding FLAIR hyperintensity in keeping with vasogenic oedema. Mass effect characterised by partial effacement of the right lateral ventricle and 2 mm leftward midline shift is stable. High FLAIR signal in right temporal sulci represents subarachnoid blood.
Tortuous flow voids and enhancing serpiginous vessels are again evident at the lateral aspect of the haematoma along the cortical/pial surface, consistent with a 12 x 21 mm nidus.
On the post contrast FSPGR, the nidus is supplied from the right middle cerebral artery and also from a PCA branch. There is a prominent cortical vein traversing from the posterior margin of the lesion into the posterior aspect of the superior sagittal sinus, and there may be smaller veins draining to the closely adjacent dural sinus (junction transverse and sigmoid). No deep venous drainage or intranidal aneurysm detected.