Criterion for imaging diagnosis of Corona Virus Disease 2019
Corona Virus Disease 2019(COVID-19),a novel acute respiratory infection,is sweeping across the globe,and has become a significant global public health event.Diagnosis of COVID-19 can be made if there is evidence of etiology or serology.Clinical symptoms of COVID-19 are generally mild in vaccinated individuals and children.Imaging assessment is the main and commonly used method for clinical diagnosis,differential diagnosis,treatment monitoring,and follow-up.When medical resources are constrained,images are appropriate for medical triage of patients with moderate to severe clinical characteristics that suspected or with high probability of COVID-19.High-resolution CT is generally used for the assessment of lung lesions with long-term follow-up.Chest X-ray is of great value in predicting the prognosis of COVID-19 and is helpful in the management of critical patients.MRI can be used for evaluating and monitoring the efficacy during treatment for pregnant women and children.AI diagnosis is expected for early screening of fever patients.Typical image manifestations of COVID-19 include four stages:early stage,progressive stage,severe stage,and recovery stage.In the early stage,patchy,subsegmental,or segmental ground glass opacities(GGOs)were mainly found in subpleural areas.In the progressive stage,the lesion area is enlarged and increased,and involves multiple lobes.In the severe stage,both lungs showed diffuse consolidation or GGOs,presenting as"white lung".In the recovery stage,the lesions are absorbed.In most non-severe patients,the lesions were completely absorbed after 3 months.Some patients developed post-COVID-19 syndrome,which showed low-density areas in one lobe or multiple lobes,GGOs with a mosaic sign,streak shadow,reticular or honeycomb-like changes,traction bronchiectasis,pulmonary bullae,and pulmonary fibrosis in images.Clinically,the moderate type is mainly shown as GGOs,while in severe/critical cases,increasing GGOs,consolidations,and multiple lobes involvement were found in both lungs.COVID-19 needs to be distinguished from pneumonia caused by other viruses,severe acute respiratory syndrome,cryptogenic organizing pneumonia,and allergic pneumonia.
NETL
NSTL
万方数据
