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Fig. 2A. —66-year-old woman with dyspnea. Selective pulmonary angiograms of right (A) and left (B) pulmonary arteries show multiple emboli. First investigator scored arterial obstruction as 16 and perfusion as 7; Miller index was 67%. Second investigator scored obstruction and perfusion as 16 and 13, respectively; Miller index was 85%. Note that both investigators had scored obstruction component as 16.