REAGENT FOR NUCLEAR MAGNETIC RESONANCE.

摘要

A reagent for nuclear magnetic resonance composed of a first inhalation gas containing oxygen at least in a concentration necessary for life supporting and a second inhalation gas to be supplied in the same amount as that of the first gas after the first gas is supplied for a given time. The second inhalation gas contains oxygen in the same concentration as that of the oxygen contained in the first gas and the concentration of the oxygen isotope <1><7>O contained in the second gas is higher than that of the oxygen isotope <1><7>O contained in the first gas, so that the blood oxyhemoglobin level after the supply of the first inhalation gas can be kept constant even after the supply of the second inhalation gas. Therefore, a change in the signal detected by NMR represents a change caused solely by the production of H2<1><7>O without being affected by a change in the oxyhemoglobin level, thus providing information regarding metabolic functions.