Fig 4. A 86-year-old woman with new onset of confusion after a recent myocardial infarct.

A, Axial 2.5-mm image from noncontrast brain CT shows a gyral calcification in the posterior right frontal lobe (arrow).

B, Axial 2.5-mm image (obtained at the same axial level as A) from noncontrast brain CT performed after cardiac arrest (5 days after A). The previously identified gyral calcification in the posterior right frontal lobe appears unchanged. Note the presence of a new gyral calcification in the anterior right frontal lobe (arrow), consistent with a calcified cerebral embolus.