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Sagittal V/P SPECT images of a patient with PE (arrow) and pleural fluid (intercepted arrow) at initial examination. Perfusion returns to normal at 3 months and remains normal at 6 months’ control. P, perfusion; PE, pulmonary embolism; qV/P, V/P quotient; V, ventilation; V/P SPECT, ventilation/perfusion single-photon emission computed tomography.
