Fig. 1 Flow chart of the study population

Fig. 2 PE in a 65-year-old male patient with confirmed diagnosis of COVID-19. a, b Coronal CT chest in pulmonary window shows bilateral GGO and posteriorly located consolidations, CT-SS = 29. c CT pulmonary angiography shows multiple segmental and subsegmental pulmonary embolism

Fig. 3 Multiple thromboembolic complications in a 50-year-old male patient with confirmed diagnosis of COVID-19. a Axial CT chest in pulmonary window shows bilateral GGO and posteriorly located consolidations, CT-SS = 24. b CT pulmonary angiography shows large thrombus in the right pulmonary artery. Axial NCCT brain scan (not shown) shows ischemic infractions in the left water shed zones. c, d Axial contrast enhanced CT scan through the spleen and kidneys shows splenic and left renal infarctions, and mural thickening of small bowel indicative of mesenteric ischemia. e, f Coronal and sagittal abdominal CT angiogram shows total occlusion of the infra-renal abdominal aorta and iliac arteries, and hanging thrombus in the abdominal aorta above the obstruction level

Fig. 4 Upper limb ischemia in a 36-year-old male patient with confirmed diagnosis of COVID-19. a Axial CT chest in pulmonary window shows bilateral GGO and posteriorly located consolidations, CT-SS = 15. b CT pulmonary angiography shows thrombi filing the right and left pulmonary arteries. c Left upper limb coronal and MIP CTA show totally thrombosed brachial artery with distal collateral filling

Fig. 5 Dural sinus thrombosis in a 38-year-old male patient who presented by persistent head and confirmed diagnosis of COVID-19. a Axial CECT shows right side focal gyral enhancement secondary to venous congestion. b Axial CTV shows empty delta sign secondary to thrombosed superior sagittal sinus. c Sagittal CTV shows multiple filling defects in the superior sagittal and straight sinuses. d Axial FLAIR image shows right side cortical vein of high signal intensity denoting thrombosis. e TOF MRV demonstrates absent flow signal in the right vein of Trolrad, proximal part of the left transverse sinus, and filling defect at the right sigmoid sinus. f Sagittal T2 image shows abnormal signal intensity of the superior sagittal and straight sinuses. Chest CT was unremarkable and CT-SS was equal to 0

Fig. 6 Multiple cerebral infarctions in a 35-year-old female patient who was under Extracorporeal Membrane Oxygenation (ECMO) machine as part of COVID-19 management. a Coronal chest CT in pulmonary window shows diffuse GGOs involving almost both lung with partial sparing of the left upper lung lobe, CT-SS = 35. b Coronal chest CT pulmonary angiography demonstrates pulmonary arteries patency and the ECMO catheters in the SVC and IVC. c, d Axial and coronal NCCT brain show bilateral ischemic infarctions and small area of hemorrhagic transformation on the left side