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Fig. 4C —57-year-old woman with pulmonary arterial hypertension due to
chronic pulmonary embolism. Cardiac catheterization yielded pulmonary artery
pressures of 66/26 mm Hg with mean pressure of 44 mm Hg. High-resolution CT
image shows mosaic perfusion in upper lobes with enlargement of segmental
arteries in areas of increased attenuation.
