Figure 3:

This proof of concept demonstrates CT perfusion findings in phase 1 in a 43-year old female patient proven COVID-19 with multiple ground glass opacities, with plasma Ddimer < 500 ng/ml and without pulmonary embolism on CT pulmonary angiography. There are multiple bilateral perfusion deficits due to microvascular obstruction, with increased blood flow in or adjacent to areas of ground glass opacities. The blood flow is slightly increased in the right lower lobe. Scan parameters: Conventional Dynamic Perfusion CT, Somatom Drive, Siemens; Scan volume 8,4 cm (aorta arch – left atrium); 1 mm recon; Dual input lung perfusion 4D, Vitrea, Vital, Canon; pulmonary flow: ml/min./100 ml; arterial flow: ml/min./100 ml; perfusion Index: % Baseline chest CT findings in selected slices (A, D), with perfusion index (B,E) and pulmonary arterial flow (C, F) in corresponding slices. (Figure courtesy of Department of Radiology, Haaglanden Medical Centre, The Hague, the Netherlands.)