Lee Thomas C, Bartlett Eric S, Fox Allan J, Symons Sean P
Division of Neuroradiology, Department of Medical Imaging, Sunnybrook and Women's College Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.
AJNR Am J Neuroradiol. 2005 Sep;26(8):2027-9.
An acute intracranial embolus may be associated with a hyperdense artery sign on CT, related to acute thrombus within the affected artery, a phenomenon that is well known and has been extensively documented. We present an unusual case of a middle cerebral artery territory acute infarct with a hypodense artery on CT. The Hounsfield unit attenuation of the embolic lesion was fat density. CT angiography and MR imaging confirmed the fatty lesion to be within the middle cerebral artery.
急性颅内栓子可能与CT上的动脉高密度征相关，这与受累动脉内的急性血栓有关，这一现象众所周知且已有大量文献记载。我们报告一例不寻常的大脑中动脉区域急性梗死病例，其CT表现为动脉低密度。栓塞病变的亨氏单位衰减为脂肪密度。CT血管造影和磁共振成像证实脂肪性病变位于大脑中动脉内。
