A 70-year-old woman with a left middle cerebral artery territory infarct after a coronary angiogram.A, Axial 2.5-mm image from noncontrast brain CT shows.

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Presentation transcript:

A 70-year-old woman with a left middle cerebral artery territory infarct after a coronary angiogram.A, Axial 2.5-mm image from noncontrast brain CT shows a calcified embolus in a Sylvian branch of the left middle cerebral artery (arrow).B, Axial 2.5-mm imag... A 70-year-old woman with a left middle cerebral artery territory infarct after a coronary angiogram.A, Axial 2.5-mm image from noncontrast brain CT shows a calcified embolus in a Sylvian branch of the left middle cerebral artery (arrow).B, Axial 2.5-mm image obtained from the same brain CT as A shows a calcific gyral attenuation in the right frontal lobe (arrow), very likely representing a second calcified cerebral embolus.C, Axial 2.5-mm image (obtained at the same axial level as A), from noncontrast brain CT performed 1 day after A and B, shows that the previously identified calcified cerebral embolus in a Sylvian branch of the left middle cerebral artery is no longer visualized.D, Axial 2.5-mm image (obtained at same axial level as B) from the same examination as C shows unchanged cortical attenuation in the right frontal lobe. Two new calcific densities are identified in the left precentral gyrus (arrows), consistent with downstream migration and fragmentation of the previously identified calcified cerebral embolus. E.C. Kavanagh et al. AJNR Am J Neuroradiol 2006;27:1996-1999 ©2006 by American Society of Neuroradiology