Microvascular Injury and Distal Thrombosis in COVID-19

"Chest CT-scan will be performed with blocked inspiration.~Lung ventilation/perfusion scintigraphy imaging will be performed within 24hrs after CT pulmonary angiography, 410MBq of Technegas will be inhaled by patients and ventilation tomography performed thereafter. Then, 185MBq 99mTc-macroaggegates will be injected intravenously followed by the perfusion tomography.~A combined CT acquisition will be performed.~The day following lung ventilation/perfusion scintigraphy, 740MBq of Tc99m labeled albumin will be intravenously administered.~Cardiac gated-blood-pool scintigraphy will be then performed in best septal left anterior oblique and left profile according to specific parameters.~45-60 min after injection, a non-gated tomographic acquisition over the lungs will be done, with the same parameters than for PS SPECT, resulting in a late albumin acquisition."