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Fig. 1 Anterior and posterior images from perfusion scintigram.
Three equally sized regions of interest over lungs are shown. Counts in each
zone were measured. Geometric means of anterior and posterior images were then
used to calculate relative perfusion and ventilation for each zone for each
lung. By this method, percentages were obtained for upper, middle, and lower
zones of right and left lungs for both perfusion and ventilation.