Bilateral Cerebral Blood Flow and Oxygen Consumption in Man by use of Krypton ⁸⁵

Side-to-side differences of estimated cerebral blood flow and oxygen consumption are found in most of 38 bilateral studies with the method of Kety and Schmidt using Kr 85 as inert gas instead of nitrous oxide. The results indicate that bilateral values reflect the blood flow and oxygen consumption of the whole brain much more reliably than unilateral values. Accurate, bilateral determinations may prove of value, especially for the individual evaluation of the results obtained in a given subject.