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Migrainous Cerebral Infarction: A Tomographic Study of Cerebral Blood Flow and Oxygen Extraction Fraction with the Oxygen‐15 Inhalation Technique

A patient with migraine who had a permanent risual field defect was studied by angiography and CT scan. He also had a tomographk study of cerebral blood flow (CBF) and oxygen extraction fraction (EO2) using the non-in Tasire continuous oxygen-15 (15O) Inhalation technique. Angiography was normal. CT scan wealed an area of decreased density with contrast enhancement suggestire of a recent infarct in the left occipital lobe. The 13O inhalation technique showed a decrease in CBF and EO, typical of recent infarcts, In the corresponding area, an Increase in CBF with normal EO2, in the left temporal lobe, and a decrease in CBF with increased EO2, in the right occipital cortex. These findings illustrate the unusual nature and extent of the ischemic process underlying migrainous cerebral infarction.