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Initial Results of Clinicophysiologic Correlations

Robert H. Ackerman, MD, MPH; John A. Correia, PhD; Nathaniel M. Alpert, PhD; Jean-Claude Baron, MD; Athanassios Gouliamos, MD; James C. Grotta, MD; Gordon L. Brownell, PhD; Juan M. Taveras, MD

Arch Neurol. 1981;38(9):537-543.

Abstract
• Initial results in over 50 patients with stroke suggest that positron images made during continuous inhalation of carbon dioxide labeled with oxygen 15 and molecular oxygen labeled with oxygen 15 provide data on tissue function that may be relevant to acute stroke management. Five cases illustrate the following findings:¹⁵O-activity patterns observed in areas of ischemic injury or infarction are what one would expect if the¹⁵O distributions represented physiologic functions, such as cerebral blood flow and metabolism. Areas of abnormal¹⁵O activity correlate with the clinical or computed tomographic (CT) localization of the deficit. In studies performed acutely, changes in¹⁵O distributions anticipate alterations in CT scans and may be predictive of outcome. Data related to oxygen metabolism correlate better with tissue viability than do those reflecting cerebral blood flow.

Author Affiliations
From the Cerebral Blood Flow Laboratory, the Department of Radiology (Drs Ackerman, Correia, Alpert, Baron, Gouliamos, Grotta, Brownell, and Taveras), and the Neurology Service (Drs Ackerman, Baron, and Grotta), Massachusetts General Hospital; and the Departments of Radiology and Neurology, Harvard Medical School, Boston. Dr Baron is now with HÔpital d'Orsay, France; Dr Gouliamos, the University "Aretaieion" Hospital, Athens, Greece; and Dr Grotta, the University of Texas Health Science Center, Houston.

Footnotes
Accepted for publication Dec 22, 1980.

Presented in part at the ninth International Symposium on Cerebral Blood Flow and Metabolism, Tokyo, June 1, 1979.

Reprint requests to Massachusetts General Hospital, Boston, MA 02114 (Dr Ackerman).

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