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Fig. 2B —76-year-old man with multiple large emboli. Coronal
multiplanar reconstructions of CT pulmonary angiography performed with 16-MDCT
scanner show endoluminal defects (arrows). Patient received pulmonary
artery obstruction index of 87.5%, and his blood gas values were
PaO2 (arterial partial pressure of oxygen), 43.4 mm Hg;
PaCO2 (arterial partial pressure of carbon dioxide),
25.5 mm Hg; SaO2 (arterial oxygen saturation), 82.5%;
and PAO2–PaO2
(alveolar–arterial difference in partial pressure of oxygen), 74.7 mm
Hg.
