Diagnostic Value of High Resolution CT Imaging for COVID-19 in 24 Confirmed Cases

Background: Covid19 virus causes pandemic worldwide. Objective: The purpose of the present study was to investigate the clinical features and imaging characteristics on chest High-Resolution Computer Tomography (HRCT) of COVID-19. Methodology: This retrospective study was conducted in the special designated department for covid-19 isolation unit under Ningxia Medical University from 10 January to 15 February 2020. The medical history, clinical symptoms, and imaging characteristics of confirmed COVID-19 patients from a single center were retrospectively analyzed. All cases underwent a chest HRCT examination. Results: A total number of 24 patients were recruited for this study of which 18 cases had clinical symptoms of respiratory tract infection; 2 cases had symptoms other than respiratory tract and 4 cases had asymptomatic. There were 15 males and 9 females aged 17 to 74 years. The main chest HRCT manifestation was diffuse ground-glass opacity (GGO) in the peripheral zone of the lungs and under the pleura. Pulmonary interstitial changes, bronchial air signs, bronchial vascular bundle thickening, paving stone signs, and "white lung" changes appeared in some cases. A few cases have enlarged lymph nodes and a small amount of pleural effusion. Conclusion: The COVID-19 has specific characteristics on chest HRCT. Bangladesh Journal of Infectious Diseases, April 2020;7(suppl_1):S3-S10

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Characteristics of chest high resolution computed tomography images of COVID-19: A retrospective study of 46 patients

Pakistan Journal of Medical Sciences ◽

10.12669/pjms.37.3.3504 ◽

2021 ◽

Vol 37 (3) ◽

Author(s):

Yibo Lu ◽

Jingru Zhou ◽

Yimei Mo ◽

Shulin Song ◽

Xue Wei ◽

...

Keyword(s):

Computed Tomography ◽

Retrospective Study ◽

High Resolution ◽

Ground Glass Opacity ◽

Ct Images ◽

Ground Glass ◽

High Resolution Computed Tomography ◽

Creative Commons ◽

Computed Tomography Images ◽

Clinical Records

Objective: To analyze the characteristics of chest high resolution computed tomography (CT) images of coronavirus disease 2019 (COVID-19). Methods: This is a retrospective study analyzing the clinical records and chest high-resolution CT images of 46 consecutive patients who were diagnosed with COVID-19 by nucleic acid tests and treated at our hospitals between January 2020 and February 2020. Results: Abnormalities in the CT images were found in 44 patients (95.6%). The lesions were unilateral in eight patients (17.4%), bilateral in 36 patients (78.3%), single in seven patients (15.9%), and multiple in 37 patients (84.1%). The morphology of the lesions was scattered opacity in 10 patients (21.7%), patchy opacity in 38 patients (82.6%), fibrotic cord in 17 patients (37.0%), and wedge-shaped opacity in two patients (4.3%). The lesions can be classified as ground-glass opacity in eight patients (17.4%), consolidation in one patient (2.2%), and ground-glass opacity plus consolidation in 28 patients (60.9%). Conclusion: Most COVID-19 patients showed abnormalities in chest CT images and the most common findings were ground-glass opacity plus consolidation. Abbreviations:COVID-19: coronavirus disease 2019, CT: computed tomography,SARS-CoV-2: severe acute respiratory syndrome coronavirus 2, RNA: ribonucleic acid. doi: https://doi.org/10.12669/pjms.37.3.3504 How to cite this:Lu Y, Zhou J, Mo Y, Song S, Wei X, Ding K. Characteristics of Chest high resolution computed tomography images of COVID-19: A retrospective study of 46 patients. Pak J Med Sci. 2021;37(3):---------. doi: https://doi.org/10.12669/pjms.37.3.3504 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Gastrointestinal Stromal Tumors: Clinical Symptoms, Location, Metastasis Formation, and Associated Malignancies in a Single Center Retrospective Study

Digestive Diseases ◽

10.1159/000489556 ◽

2018 ◽

Vol 36 (5) ◽

pp. 337-345 ◽

Cited By ~ 7

Author(s):

Ali Aghdassi ◽

Agnes Christoph ◽

Frank Dombrowski ◽

Paula Döring ◽

Christoph Barth ◽

...

Keyword(s):

Retrospective Study ◽

Gastrointestinal Stromal Tumors ◽

Clinical Symptoms ◽

Tumor Location ◽

Metastasis Formation ◽

Single Center ◽

Surveillance Strategy ◽

Mesenchymal Tumors ◽

Stromal Tumors ◽

Single Center Study

Background and Aims: Gastrointestinal stromal tumors (GISTs) are rare malignancies but the most common mesenchymal tumors of the digestive tract. Recent advances in diagnostic imaging and an increasing incidence will confront us more frequently with stromal tumors. This single center study aimed to characterize GIST patients in terms of tumor location, clinical presentation, metastasis formation, as well as associated secondary malignancies. Methods: In a retrospective study, 104 patients with a histologically confirmed diagnosis of GIST, collected between 1993 and 2011, were characterized for several clinical features. Results: The most common GIST location was the stomach (67.6%) followed by the small intestine (16.2%). Gastrointestinal bleeding (55.8%) and abdominal pain (38.5%) were the most frequently reported symptoms whereas about one-third of patients remained clinically asymptomatic (31.6%); 14.4% of patients had either synchronous or metachronous metastases and there was a significant prevalence also in the low risk group. The proportion of secondary malignant associated neoplasms was 31% in our GIST cohort, among which gastrointestinal, genitourinary tumors, and breast cancer were the most prevalent. Conclusion: There was a considerable risk for metastasis formation and the development of secondary neoplasias that should encourage discussion about the appropriate surveillance strategy after surgery for GIST.

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The characteristics of clinical symptoms for patients with vertigo: a single-center retrospective study

European Journal of Emergency Medicine ◽

10.1097/mej.0000000000000834 ◽

2021 ◽

Vol 29 (1) ◽

pp. 73-74

Author(s):

Atsushi Tanikawa ◽

Kento Ikegawa ◽

Go Makishi ◽

Hisashi Dote ◽

Takahiro Atsumi ◽

...

Keyword(s):

Retrospective Study ◽

Clinical Symptoms ◽

Single Center

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Risk Factors for Perioperative Respiratory Adverse Events in Children with Recent Upper Respiratory Tract Infection: A Single-Center-Based Retrospective Study

Therapeutics and Clinical Risk Management ◽

10.2147/tcrm.s282494 ◽

2020 ◽

Vol Volume 16 ◽

pp. 1227-1234

Author(s):

Hyun Jung Lee ◽

Jae Hee Woo ◽

Sooyoung Cho ◽

Hye-Won Oh ◽

Hyunyoung Joo ◽

...

Keyword(s):

Risk Factors ◽

Retrospective Study ◽

Tract Infection ◽

Adverse Events ◽

Respiratory Tract ◽

Respiratory Tract Infection ◽

Upper Respiratory Tract Infection ◽

Upper Respiratory Tract ◽

Single Center ◽

Upper Respiratory

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Comparative Study of HRCT Imaging Characteristics of Psittaci Pneumonia and COVID-19 Pneumonia

10.21203/rs.3.rs-967889/v1 ◽

2021 ◽

Author(s):

Zhenni Mao ◽

Changlian Tan ◽

Sainan Cai ◽

Qin Shen ◽

Qinru Liu ◽

...

Keyword(s):

Pleural Effusion ◽

Clinical Symptoms ◽

Ground Glass Opacity ◽

Chlamydia Psittaci ◽

Chest Imaging ◽

Test Results ◽

Special Significance ◽

Pneumonia Patient ◽

Imaging Characteristics ◽

Acid Test

Abstract Backgroud: Both Chlamydia psittaci and COVID-19 virus can cause lung inflammation, which manifests extremely similarly in clinical symptoms and imaging. Especially during the epidemic of COVID-19, psittacosis pneumonia is easily misdiagnosed as COVID-19 pneumonia. The identification of the chest imaging between the two diseases is of special significance when the epidemiological contact history is unclear, and the etiology and nucleic acid test results are not available. This study conducts to compare the imaging characteristics on chest high-resolution CTs (HRCT) between patients with psittaci pneumonia and COVID-19 pneumonia.Methods: A retrospective analysis of the imaging characteristics on chest HRCTs of 10 psittaci pneumonia patients and 13 COVID-19 pneumonia patients. The similarities and differences in HRCT images of patients with psittaci pneumonia and COVID-19 pneumonia were analyzed. Results: HRCT showed that among the 10 psittaci pneumonia patients, 8 cases (80.00%) had single lobe involvement, and 2 cases (20.00%) had multiple lobe involvement. Among the 13 COVID-19 pneumonia patients, 2 cases had single lobe involvement (15.38%), and 11 cases had multiple lobe involvement (84.62%). The types of lesions in 10 psittaci pneumonia patients included simple consolidation in 5 cases (50.00%), and ground-glass opacity (GGO) with consolidation in 5 cases (50.00%). The types of lesions in 13 COVID-19 pneumonia patients included simple GGO in 6 cases (46.15%), GGO with consolidation in 4 cases (30.77%), GGO with paving stone sign in 2 cases (15.38%), and simple consolidation in 1 case (7.69%). Lymphadenopathy was observed in 1 psittaci pneumonia patient (10.00%) and 1 COVID-19 pneumonia patient (7.69%). Among the 10 psittaci pneumonia patients, 8 cases (80.00%) had bronchial inflation, and 6 patients (60.00%) had pleural effusion. Among the 13 COVID-19 pneumonia patients, 5 patients (38.46%) showed signs of bronchial inflation, while no pleural effusion was observed in 13 patients.Conclusion: Chest HRCTs can distinguish COVID-19 pneumonia from psittaci pneumonia, and can provide early diagnoses of these two diseases.

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Clinical imaging characteristics of inpatients with COVID-19 in Heilongjiang Province, China: a retrospective study

10.21203/rs.3.rs-31215/v1 ◽

2020 ◽

Author(s):

Hao Jiang ◽

Wei Guo ◽

Huijie Jiang ◽

Mingyu Zhang ◽

Lai Wei ◽

...

Keyword(s):

Intensive Care Unit ◽

Intensive Care ◽

Clinical Laboratory ◽

Clinical Symptoms ◽

Ground Glass Opacity ◽

Care Group ◽

Heilongjiang Province ◽

Care Groups ◽

Imaging Characteristics ◽

Lung Lobes

Abstract Objectjve: To investigate the clinical, laboratory, and radiological characteristics of patients with coronavirus disease 2019 (COVID-19) in Heilongjiang Province. Methods: The present study carried out a retrospective analysis of 59 patients with COVID-19, including 44 patients in the intensive care unit (ICU) and 15 patients in the non-intensive care unit. The characteristics of the two groups of patients were compared.Results: ICU care group was older and the incidence was higher than that of non-ICU group. Lymphopenia, neutrophils, and increased D-dimer levels were high-risk causes of COVID-19 patients. Compared to the non-ICU care group, the incidence of pulmonary consolidation and Ground-glass opacity combined consolidation in the ICU care group was significantly higher, all lung lobes were more likely to be involved, and the number of lung lobes involved was greater and the area around the bronchi was more likely to be involved. Of the 59 patients with COVID-19 in this group, 15 received mechanical ventilation. All the intubated patients involved lung lobes, and a large number of lesions were seen in the area around the bronchial vessels. Conclusion: Significant differences were observed in clinical symptoms, laboratory tests, and CT features between the ICU and non-ICU care groups.

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The High Resolution Scanning Transmission Electron Microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100051591 ◽

1974 ◽

Vol 32 ◽

pp. 316-317

Author(s):

A. V. Crewe

Keyword(s):

Electron Microscope ◽

High Resolution ◽

High Vacuum ◽

Scanning Transmission Electron Microscope ◽

Ultra High Vacuum ◽

Resolving Power ◽

Imaging Characteristics ◽

Transmission Electron ◽

Scanning Transmission ◽

The Moment

The high resolution STEM is now a fact of life. I think that we have, in the last few years, demonstrated that this instrument is capable of the same resolving power as a CEM but is sufficiently different in its imaging characteristics to offer some real advantages.It seems possible to prove in a quite general way that only a field emission source can give adequate intensity for the highest resolution^ and at the moment this means operating at ultra high vacuum levels. Our experience, however, is that neither the source nor the vacuum are difficult to manage and indeed are simpler than many other systems and substantially trouble-free.

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