THE MERCK MANUAL: The Merck Manual of Diagnosis and Therapymultimedia


  • Pulmonary Embolism
  • Pulmonary Embolism (Ventilation Scan)

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    Pulmonary Embolism (Ventilation Scan)

    The upper left-hand image is an abnormal perfusion scan in the right posterior oblique (RPO) position. All of the other images are ventilation scans in the RPO position; the ventilation is normal. This "mismatch" between abnormal perfusion and normal ventilation of the right lung indicates a high probability of acute pulmonary embolism.

    By permission of the publisher. From Kucher N, Goldhaber S, Sewell J, et al. In Bone's Atlas of Pulmonary and Critical Care Medicine. Edited by J Crapo. Philadelphia, Current Medicine, 2005.