Fig. 3.

CT pulmonary angiography and dual-energy CT (DECT) perfusion in coronavirus disease 2019 (COVID-19)-related ARDS. (A) DECT perfused volume map of a patient without COVID-19 and no pulmonary embolism (control). The image is notable for homogeneous coloring throughout both lungs (indicating normal iodine distribution and normal perfusion). (B) Soft tissue reconstruction showing filling defects in lower lobe pulmonary arteries (arrows) in a 42-year patient with COVID-19. (C) Corresponding DECT color map showing widespread perfusion defects (arrows) in the same patient 42-year-old patient. (D) Example of wedge-shaped perfusion defect on DECT color map. (E) Example of mottled generalized perfusion defect on DECT color map.

(Courtesy of Dr Brijesh V. Patel and Professor Sujal R. Desai, London, UK).