Fig. 7
From: New MR sequences in daily practice: susceptibility weighted imaging. A pictorial essay
Brainstem haemorrhage in a 43-year-old patient. a CT shows an acute haemorrhagic lesion located in the medulla oblongata. b The SWI minIP image clearly depicts the brainstem haemorrhage, which is markedly hypointense. c, d SWI, axial and reformatted sagittal images, processed with a maximum intensity projection algorithm (MIP), show flow-related enhancement within the haemorrhagic lesion (arrow) and a hypertrophied right posterior inferior cerebellar artery (PICA; open arrow) which are consistent with a small ruptured brainstem AVM. e Cerebral angiography, selective injection of the right vertebral artery: brainstem AVM (arrow) fed by branches of the right PICA and early venous drainage into a cerebellar vein (arrowheads)