Radiological Imaging of Viral Pneumonia Cases Identified Before the COVİD-19 Pandemic Period and COVİD-19 Pneumonia Cases Comparison of Characteristics (original) (raw)
Comparison of Radiographic Appearances of Covid-19 Pneumonia and Influenza Pneumonia
Background The novel coronavirus (COVID-19) first discovered in December 2019 has infected over 400 million people worldwide with over 5 million deaths as of February 2022. Differentiation of the imaging appearance of COVID-19 pneumonia and the endemic seasonal influenza pneumonia is clinically important as it may help give direction on patient care. The aim of this study was to evaluate for differences in radiographic appearances of COVID-19 pneumonia and influenza pneumonia. Methods This was a cross sectional descriptive study comparing patterns of pneumonia on radiographs and CT examinations of patients diagnosed with COVID-19 pneumonia and influenza pneumonia. The comparisons included the predominant radiographic pattern of pneumonia (alveolar, interstitial, ground glass or nodular) and the extent of pneumonia (lobar, multi-lobar or diffuse involvement). The radiographic severity of disease was classified as mild, moderate or severe based on extent of lung involvement. Results A...
Diagnostics, 2021
Imaging plays an important role in the detection of coronavirus (COVID-19) pneumonia in both managing the disease and evaluating the complications. Imaging with chest computed tomography (CT) can also have a potential predictive and prognostic role in COVID-19 patient outcomes. The aim of this pictorial review is to describe the role of imaging with chest X-ray (CXR), lung ultrasound (LUS), and CT in the diagnosis and management of COVID-19 pneumonia, the current indications, the scores proposed for each modality, the advantages/limitations of each modality and their role in detecting complications, and the histopathological correlations.
Current Imaging Trends in COVID-19 Pneumonia
Journal of Nepal Medical Association, 2020
COVID-19 has rapidly emerged as a pandemic threatening lives and healthcare systems worldwide.With the emergence of the disease in Nepal, all faculties of medicine need to be well prepared toface the challenge. Fortunately, now plenty of research is available to facilitate our preparednessin the war against COVID-19. The reverse transcriptase-polymerase chain reaction is the currentgold standard diagnostic test and chest Computed Tomography scan for screening the disease isconsidered inappropriate by most society recommendations. The Nepal Radiologists’ Associationhas proposed its guidelines which have been endorsed by the Nepal Medical Council. This articleaims to summarize the role of imaging focusing on chest X-ray and Computed Tomography scanincluding the indications, specific findings, and important differentials. Imaging needs to be donetaking necessary precautions, to minimize disease transmission, protect health care personnel, andpreserve health care system functioning.
The Radiology of COVID-19 Pneumonia
2021
Coronavirus disease 2019 (COVID-19) has reached a pandemic stage in March 2020 and currently more than 220 million patients worldwide are infected. The characteristic findings of COVID-19 pneumonia are bilateral, peripheral, rounded ground-glass opacities (GGO) which are dominantly located in the lower lobes and that may be accompanied by consolidation. The distribution of the parenchymal lesions was reported to be bilateral (88%), multi-lobar (78%) and peripheral (76%), with a tendency to involve the posterior regions of the lungs (80%). Several other chest CT findings, such as interlobular septal thickening, bronchiectasis, "crazy paving" and halo sign, have also been reported but with a lower frequency. RSNA has published consensus statements to reduce report variability among radiologists and defined 4 main categories: typical, indeterminate, atypical, and negative, to provide a relative likelihood that these findings are attributable to COVID-19 pneumonia. It is vital to understand that imaging may be normal in the early stages of COVID-19, and many conditions may present with imaging findings mimicking COVID-19 pneumonia. Chest CT may be also used as a useful tool for better identification of patients who will benefit from more aggressive therapy. In addition, CT may be used to evaluate patency of pulmonary and coronary vascular structures and myocardial damage. Although CT scan is not recommended as a diagnostic and screening tool, it can be helpful to clinician for a fast and accurate decision-making and has a crucial role in the diagnosis, risk stratifying, and follow-up of the progression of COVID-19 pneumonia.
Canadian Journal of Infectious Diseases & Medical Microbiology, 2022
Background. orax computed tomography (CT) imaging is widely used as a diagnostic method in the diagnosis of coronavirus disease 2019 (COVID-19)-related pneumonia. Radiological di erential diagnosis and isolation of other viral agents causing pneumonia in patients have gained importance, particularly during the pandemic. Aims. We aimed to investigate whether there is a di erence between CT images from patients with COVID-19-associated pneumonia compared to CT images of patients with pneumonia due to other viral agents and which nding may be more e ective in diagnosis. Study Design. e study included 249 adult patients with pneumonia identi ed by thorax CT examination and with a positive COVID-19 RT-PCR test compared to 94 patients diagnosed with non-COVID-19 pneumonia (viral PCR positive but no bacterial or fungal agents detected in other cultures) between 2015 and 2019. CT images were retrospectively analyzed using the PACS system. CT ndings were evaluated by two radiologists with 5 and 20 years of experience, in a blinded fashion, and the outcome was decided by consensus. Methods. Demographic data (age, gender, and known chronic disease) and CT imaging ndings (percentage of involvement, number of lesions, distribution preference, dominant pattern, ground-glass opacity distribution pattern, nodule, tree in bud sign, interstitial changes, crazy paving sign, reversed halo sign, vacuolar sign, halo sign, vascular enlargement, linear opacities, traction bronchiectasis, peribronchial wall thickness, air trapping, pleural retraction, pleural e usion, pericardial e usion, cavitation, mediastinal/hilar lymphadenopathy, dominant lesion size, consolidation, subpleural curvilinear opacities, air bronchogram, and pleural thickening) of the patients were evaluated. CT ndings were also evaluated with the RSNA consensus guideline and the CORADS scoring system. Data were divided into two main groups-non-COVID-19 and COVID-19 pneumonia-and compared statistically with chi-squared tests and multiple regression analysis of independent variables. Results. RSNA and CORADS classi cations of CT scan images were able to successfully di erentiate between positive and negative COVID-19 pneumonia patients. Statistically signi cant di erences were found between the two patient groups in various categories including the percentage of involvement, number of lesions, distribution preference, dominant pattern, nodule, tree in bud, interstitial changes, crazy paving, reverse halo vascular enlargement, peribronchial wall thickness, air trapping, pleural retraction, pleural/pericardial e usion, cavitation, and mediastinal/hilar lymphadenopathy (p < 0.01). Multiple linear regression analysis of independent variables found a signi cant e ect in reverse halo sign (β 0.097, p < 0.05) and pleural e usion (β 10.631, p < 0.05) on COVID-19 pneumonia patients. Conclusion. e presence of reverse halo and absence of pleural e usion was found to be characteristic of COVID-19 pneumonia and therefore a reliable diagnostic tool to di erentiate it from non-COVID-19 pneumonia.
Indian Journal of Radiology and Imaging
Background: Chest radiography (CXR) is a widely available baseline radiological modality in evaluating symptomatic patients with suspected or confirmed Covid-19 disease. Serial changes can help in monitoring the patients in conjunction with the clinical status of these patients in a hospital setting. Purpose: The purpose of this study was to analyse the patterns of radiological findings on chest radiograph (CXR) for suspected and confirmed COVID-19 patients on initial presentation to the emergency medical services (EMS) on admission and to assess the progression and resolution. Materials and Methods: In this study, patients who presented to EMS of a multispeciality hospital as suspected or confirmed Covid-19 on consecutive reverse transcriptase polymerase chain reaction (RT-PCR). CXR was examined for findings of haziness, patterns and distribution of opacities. Progression and regression of findings in serial CXR were studied and evaluated with the clinical and laboratory parameters...
Hong Kong Medical Journal, 2020
Between 25 January 2020 and 7 February 2020, 22 patients admitted to Princess Margaret Hospital, Hong Kong had diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection confirmed by real-time reverse transcription polymerase chain reaction of nasopharyngeal aspirate and throat swab. Of them, three (13.6%) patients required intensive care unit (ICU) admission. Their clinical and laboratory data as well as computed tomography (CT) images were reviewed. Herein, we review the findings from unenhanced CT scans of the thorax and serial chest radiographs in these three patients with coronavirus disease 2019 (COVID-19). The aim of the study was to provide insights into possible prognostic indicators of COVID-19 from an imaging perspective.
2020
OBJECTIVESTo characterize CT-findings of COVID-19 pneumonia and their value in diagnosis and outcome prediction.METHODSChest CTs of 182 patients with a confirmed diagnosis of COVID-19 infection by RT-PCR were evaluated for the presence of CT-abnormalities and their frequency. Regarding the patient outcome each patient was categorized in 5 progressive stages and the duration of hospitalization was determined. Regression analysis was performed to find which CT findings are predictive for patient outcome and to assess prognostic factors for the hospitalization duration.RESULTSMultivariate statistical analysis confirmed a higher age (OR= 1.023, p= 0.025), a higher total visual severity score (OR= 1.038, p= 0.002) and the presence of crazy paving (OR= 2.160, p= 0.034) as predictive parameters for patient outcome. A higher total visual severity score (+ 0.134 days; p= 0.012) and the presence of pleural effusion (+ 13.985 days, p= 0.005) were predictive parameters for a longer hospitalizat...
Clinical Imaging, 2021
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2021
The SARS-CoV-2 can cause severe pneumonia and highly impact general health. We aimed to investigate different clinical features and CT scan findings of patients with COVID-19 based on disease severity to have a better understanding of this disease. For this purpose, 90 patients with coronavirus were examined retrospectively, which were divided into three categories based on the severity of the disease: mild/moderate, severe, and very severe. It has been shown that mean age and duration of hospitalization of patients increased with increasing the severity of disease. The most common clinical symptoms were shortness of breath, cough, and fever. As the severity of the disease increased from mild/moderate to very severe, there was an increase in neutrophile counts and a decrease in lymphocytes and white blood cells (WBC) showing excessive inflammation associated with severe forms of COVID-19. Subpleural changes (81%) and ground-glass opacification/opacity (GGO) lesions (73%) of the lung...