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B. Same patient. Coronal, minimum intensity projection (minIP) thick slab cine (anterior to posterior). This type of reconstruction provides excellent assessment of mosaic attenuation, which in this case is due to mosaic perfusion secondary to chronic thromboembolic pulmonary hypertension. The brighter areas of the lung parenchyma are relatively hyperperfused, whereas the darker areas are oligemic, and correlate with areas of diminished regional vascular caliber. Video available on AccessMedicine.com.