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Initial CT findings and temporal changes (69 patients)


The imaging manifestations of the new coronavirus pneumonia are similar to common viral pneumonia, but also have its own imaging characteristics. In our study, patients may have a single lobe or multiple lobes involvement; 30.2% of patients had only one lobe involved, and 44.4% had all lobes involvement.

This study shows that the most common manifestations of new coronavirus pneumonia are patchy/punctate ground glass opacities (85.7%) and patchy consolidation (19.0%), and findings are mainly distributed in the subpleural region.

As the disease progressed, the range of ground glass density patches and consolidation increased, which were mainly distributed in the middle and outer zones of the lung. When patients’ condition would improve, a little fibrous stripe may appear. Conversely, when patients’ condition worsened, the lungs showed diffuse lesions, and the density of both lungs increased widely, showing a “white lung” appearance, which seriously affects the patient’s lung function. 

SOURCE: European Radiology

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Imaging features of COVID-19 pneumonia


Non-contrast-enhanced chest computed tomography (CT) showed multiple, bilateral, peripheral, patchy ground glass opacities (lobular and subsegmental), with fading margins. The lesions had mainly a subpleural distribution.

CT also demonstrated slight thickening of the adjacent pleura and interlobular septa in the lesion. After 5 days, a subsequent CT scan showed enlarged lesions, compared with previous images, and progressive ground glass opacities in both lower lobes, indicating disease progression.

IMAGES: European J Nucl Med + Mol Imaging

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Chest CT: relationship to negative RT-PCR testing


Some patients with positive chest CT findings may present with negative results of real time reverse-transcription-polymerase chain- reaction (RT-PCR) for 2019 novel coronavirus (2019-nCoV).

In this report, we present chest CT findings from five patients with 2019-nCoV infection who had initial negative RT-PCR results. All five patients had typical imaging findings, including ground-glass opacity (GGO) (5 patients) and/or mixed GGO and mixed consolidation (2 patients). After isolation for presumed 2019-nCoV pneumonia, all patients were eventually confirmed with 2019-nCoV infection by repeated swab tests.

A combination of repeated swab tests and CT scanning may be helpful when for individuals with high clinical suspicion of nCoV infection but negative RT-PCR screening.

SOURCE: Radiology

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Coronavirus pneumonia: CT scan findings – II


Thirty five-year-old man with 2019-novel coronavirus pneumonia.

A–D. Axial computed tomography (CT) images of upper, middle, and lower lobes of right lung and lower lobe of left lung show multifocal regions of patchy consolidation and nodular ground-glass opacities, mainly distributed along bronchial bundles and subpleural regions. E. Coronal reformation CT image shows multifocal nodular ground glass opacities in right lower lung lobe.

ORIGINAL REPORT: Korean Journal of Radiology