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Insights into Imaging
Fig. 2 | Insights into Imaging

Fig. 2

From: Dual-energy CT angiography reveals high prevalence of perfusion defects unrelated to pulmonary embolism in COVID-19 lesions

Fig. 2

a 66-year-old male with COVID-19 related pneumonia at hospital day 7. A rt-PCR assay confirmed the diagnosis. DE-CTPA was performed for increased D-dimer (640 ng/mL) and oxygen requirement levels. Heterogeneous iodine distribution (PD +) is seen with sub-pleural perfusion defects (iodine map, left) partially matching the consolidations in the lower lobes (conventional lung images, right). Iodine concentration was measured at 0.452 mg/cm3 using a 1 cm2 ROI within the circle and at 0.873 mg/cm3 within the normal-appearing parenchyma. b 57-year-old-male with a rt-PCR confirmed COVID-19 pneumonia also at hospital day 7. The D-dimer level was increased at 1160 ng/mL. Heterogeneous perfusion defects (PD +) are seen in the sub-pleural areas (iodine map, left), partially matching the lung opacities (right). Iodine concentration was measured at 0.692 mg/cm3 within the circle and at 0.928 mg/cm3 within the normal-appearing parenchyma

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