Imaging of cerebral ischemia. John-Henry Corbett Department of clinical imaging science University of the Free State 3/08/2012. Stroke is a clinical term applied to any abrupt non-traumatic brain insult Infarction 75% Haemorrhage 25%
Department of clinical imaging science
University of the Free State
MCA dot sign
of lentiform nucleus
Insular ribbon sign
ASPECTS score of 7
Hyperdense left MCA. nucleus (L)Intravascular thrombus in this segment on CT angiography.
Left proximal MCA thrombus
Basilar artery throbus
DWI nucleus (L)
Posterior circulation acute ischemic stroke
ADC nucleus (L)
Old infarcts right frontal and left parietal
MRI -DWI nucleus (L)
MRI - PWI
Left MCA infarction. Match in DWI and PWI, so no penumbra.
Therefore not candidate for thrombolytic therapy.
Left carotid bulb stenosis
Core infarct and ‘false penumbra’
Left sided weakness, one week after a fall. ↑MTT, ↔CBV. Vasospasm due to subarachnoid blood.
Physiologic perfusion delay due to bilateral aplastic posterior communicating arteries