Abstract
SUMMARY Twelve patients with chronic obstructive pulmonary emphysema were studied with both pulmonary angiograms and intravenous R 131 IHSA (radio-iodinated human serum albumin) lung scans, in an attempt to localize the more severely affected areas of the lung. There was a good correlation between the two studies, particularly where the abnormalities were marked. Discrepancies between the distribution of the vasculature, as shown by the angiogram, and the degree of radioactivity on the lung scan were usually minor. It is suggested that lung scanning is a reasonably reliable method for defining the poorly vascularized areas in patients with emphysema.
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