ABSTRACT
The current COVID-19 pandemic has highlighted the essential role of chest computed tomography (CT) examination in patient triage in the emergency departments, allowing them to be referred to "COVID" or "non-COVID" wards. Initial chest CT examination must be performed without intravenous administration of iodinated contrast material, but contrast material administration is required when pulmonary embolism is suspected, which seems to be frequent in severe forms of the disease. Typical CT features consist of bilateral ground-glass opacities with peripheral, posterior and basal predominance. Lung disease extent on CT correlates with clinical severity. Artificial intelligence could assist radiologists for diagnosis and prognosis evaluation.
Subject(s)
Betacoronavirus , Coronavirus Infections/diagnostic imaging , Coronavirus Infections/epidemiology , Pandemics , Pneumonia, Viral/diagnostic imaging , Pneumonia, Viral/epidemiology , Pulmonary Embolism/diagnostic imaging , Tomography, X-Ray Computed , Adult , Aged , Artificial Intelligence , COVID-19 , Child , Contrast Media , Coronavirus Infections/complications , Female , Hospital Units/classification , Hospitalization , Humans , Lung/diagnostic imaging , Male , Middle Aged , Pneumonia, Viral/complications , Pregnancy , Pulmonary Embolism/etiology , Radiography, Thoracic/methods , SARS-CoV-2 , Severity of Illness Index , TriageABSTRACT
We report on shot noise measurements in carbon nanotube based Fabry-Perot electronic interferometers. As a consequence of quantum interference, the noise power spectral density oscillates as a function of the voltage applied to the gate electrode. The quantum shot noise theory accounts for the data quantitatively and allows us to determine directly the transmissions of the two channels characterizing the nanotube. In the weak backscattering regime, the dependence of the noise on the backscattering current is found weaker than expected, pointing either to electron-electron interactions or to weak decoherence.
