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¹Başkent University Medical School Hospital, Departments of Radiology, Ankara, Turkey
² Başkent University Medical School Hospital, Departments of Neurosurgery, Ankara, Turkey
³ Başkent University Medical School Hospital, Departments of Neurology, Ankara, Turkey Early detection of acute infarct has been more important since the introduction of new therapeutic regimens such as thrombolysis. In cerebrovascular accidents, first mode of investigation is computed tomography to rule out the possibility of hemorrhage; it is possible to diagnose acute infarction in the first four hours by magnetic resonance. We present two cases of acute cerebral infarction detected as bright middle cerebral artery at the first two and six hours with non-contrast computed tomography seans. Follow-up magnetic resonance seans of these two cases showed acute infarction with hemorrhagic transformation. Keywords : Computerized tomography, hemorrhagic transformation, infarct, magnetic resonance, middle cerebral artery