Author Archives: azaleaazelia
Imaging of coronavirus disease 2019 part 19
Pan et al. investigated the time course of lung changes during recovery from COVID-19 pneumonia. The results showed that with the evolution of the disease, GGO would enlarge with a crazy paving pattern and partial consolidation. Lung involvement reached a … Continue reading
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Imaging of coronavirus disease 2019 part 18
Dynamic changes on chest CT Chest CT can also evaluate the time course of COVID-19 and assess the evolution of disease severity. Chung et al. evaluated each of the five lung lobes and determined the degree of involvement and rated … Continue reading
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Imaging of coronavirus disease 2019 part 17
Critical stage disease may show further expansion of consolidations, with the whole lung showing increased opacity, a so-called “white lung”. In recovery stage patients, the lesion area is reduced and absorbed, or only residual fibrous lesions are seen. Less common … Continue reading
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Imaging of coronavirus disease 2019 part 16
The lesion range can be acinar, leaflet, lung segment or lung lobe. Lesions are distributed as bilateral asymmetrical subpleural wedge-shaped or fan-shaped, mostly in the caudal lesions of the lung and dorsal subpleural area. When interlobular septa and intralobular interstitium … Continue reading
Imaging of coronavirus disease 2019 part 15
Disease progression mostly occurs in course of 7-10 days, with enlarged and increased density of GGO, and consolidated lessions with air bronchogram sign. GGOs from the early stage expand, and the density increases gradually. Consolidation shows increased lung parenchimal density, … Continue reading
Imaging of coronavirus disease 2019 part 14
Typical features on chest CT Typical features on chest CT include ground-glass opacity with a cloud-like change on chest CT, not obscuring the accompanying pulmonary vascular structures in lungs. Corresponding pathological changes are exudation in the alveolar cavity with partial … Continue reading
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Imaging of coronavirus disease 2019 part 13
Typical features on chest X-Ray Multiple small patchy shadows and interstitial changes in the lower zone of lungs are typical imaging features in common type patients. With the progression of the disease, it may manifest as a patchy distribution or … Continue reading
Imaging of coronavirus disease 2019 part 12
It is recommended to use volume CT with a maximum acquisition slice thickness of 5mm (>16 slice multi-detector CT) and a reconstruction slice thickness of 1.0-1.5mm. Multi-planar reformats (transverse, sagittal and coronal planes) are beneficial for the early detection of … Continue reading
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Imaging of coronavirus disease 2019 part 11
The sensitivity and specificity chest X-ray for mild type patients are relatively low. It is not recommended for patients with early COVID-19 stage. Chest CT scans can demonstrate almost all abnormalities including early mild exudative lesions. Chest CT is the … Continue reading
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Imaging of coronavirus disease 2019 part 10
Recommendation for chest imaging techniques Imaging, in particular chest X-ray and computed tomography (CT), is important in the detection of lung lesions, assessment of lesion size, density, and evolution. Chest X-ray examination is convenient and fast, and has been proven … Continue reading
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