Abstract
The use of radioisotopes in the measurement of cerebral blood flow has been extensively investigated.<sup>1</sup>Although recent studies<sup>2-4</sup>involving external monitoring of intravenously administered radionuclides have been of significant value in the assessment of cerebral circulation, anatomic or regional localization of vascular lesions has proven difficult. The clinical utility of the scintillation camera in the performance of dynamic clinical studies with radioisotopes<sup>5,6</sup>and the recent use of short-lived radionuclides such as sodium pertechnetate Tc 99m in studies of regional blood flow<sup>7</sup>suggested the feasibility of quantitating cerebral blood flow concomitant with constant visual monitoring of the passage of<sup>99m</sup>Tc through the carotid and major cerebral arteries. Forty-four subjects without neurologic disease have been studied as controls; 15 patients with recent cerebrovascular accidents and 1 patient with an arteriovenous malformation have also been tested. <h3>Procedure</h3> We have recently modifiedthe scintillation camera employed,<sup>5</sup>by the use
Published Version
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