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Differences between radiological findings of COVID-19 and non-COVID-19 infections in pediatric patients

World Journal of Pediatrics 2021年第1期17卷 79-84页

作者： Beyza Nur Kuzan Bülent Aslan Taha Yusuf Kuzan Aysegül Karahasan Yagci nuri cagatay cimsit Department of Radiology Marmara University School of MedicineIstanbul 34899Turkey Department of Radiology Sancaktepe Sehit Dr.Ilhan Varank Training and Research HospitalIstanbul 34785Turkey Department of Clinical Microbiology Marmara University School of MedicineIstanbul 34899Turkey

Background This study aimed to reveal the differences between coronavirus disease 2019(COVID-19)infections and non-COVID-19 respiratory tract infections in pediatric *** Sixty pediatric patients admitted to the hospital between March 11,2020 and April 15,2020 with respiratory tract infections were evaluated *** them,20 patients with reverse transcription-polymerase chain reaction(RT-PCR)tests and chest computed tomography(CT)examinations were included in the *** to the RT-PCR test results,the patients were divided into the COVID-19 and non-COVID-19 *** clinical observations,laboratory results,and radiological features from the two groups were then *** According to the RT-PCR test results,12 patients were assigned to the COVID-19 group and 8 to the non-COVID-19 *** were no significant differences between the two groups in terms of clinical or laboratory *** terms of radiological features,the presence of bronchiectasis and peribronchial thickening was statistically significantly higher in the non-COVID-19 group(P=0.010 and P=0.010,respectively).Conclusions In pediatric cases,diagnosing COVID-19 using radiological imaging methods plays an important role in deter-mining the correct treatment approach by eliminating the possibility of other infections.

关键词： Chest imaging Computerized tomography COVID-19 Pediatric Pneumonia

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Diffusion Weighted MRI: A Practical and Quick Approach to Evaluate Brain Death

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International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2015年第2期4卷 113-123页

作者： Ihsan nuri Akpinar Bediha Aygun nuri cagatay cimsit Ozlem Turkoglu Department of Radiology Medical Faculty Marmara Univeristy Istanbul Turkey Department of Radiology Haydarpasa Numune Education and Research Hospital Istanbul Turkey Department of Radiology Dr. Lutfi Kirdar Kartal Education and Research Hospital Istanbul Turkey

It is significantly important to define brain death with greater precision in terms of timing and accuracy. While in the past determination of brain death is simply based on conventional angiography, now with major technological advances the Diffusion-weighted MRI is a new method sensitive to cerebral ischemia which gives on the molecular level the deeply ischemic nature of the changes. Its value in brain death has been shown in various studies. In our study, we did a comparative overview of diffusion-weighted imaging (DWI) with and magnetic resonance angiography (MRA) considering the contribution of ADC measurements from brain parenchyma, in the patients diagnosed with brain death by clinical criteria. We studied 16 brain deaths in serial studies, in which there is a prominent difference between the white and gray matter ADC values on diffusion MRI. In the postmortem brains, ADC values comparing with the normal brain parenchyma, were reduced 65% in white matter and 42% in gray matter. Also, the patients’ ADC values of gray and white matter were significantly lower than those of irreversible brain-ischemia patients’ in ADC values. In comparison to most of the other studies, in our study population studied is large, in which is a comprehensive study that results consistent with the literature. As a result we propose that in the definition of brain death Diffusion MRI and ADC measurements are reliable to show diffuse ishemic changes of brain parenchyma.

关键词： DWI MRI Brain Death Transplantation

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Role of echo Doppler ultrasonography in the evaluation of postprandial hyperemia in cirrhotic patients

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World Journal of Gastroenterology 2008年第2期14卷 260-264页

作者： Ozdogan Osman Atalay Huseyin cimsit cagatay Tahan Veysel Tokay Sena Giral Adnan Imeryuz Nese Baltac|oglu Feyyaz Tuney Davut Erzen Canan Tozun Nurdan Department of Gastroenterology Marmara University School of Medicine Istanbul Turkey Department of Internal Medicine Marmara University School of Medicine Istanbul Turkey Department of Radiology Marmara University School of Medicine IstanbulTurkey

AIM: To assess the role of echo-Doppler ultrasonography in postprandial hyperemia in cirrhotic patients by comparing the results with the hepatic vein catheterization ***: Patients with cirrhosis, admitted to the portal hemodynamic laboratory were included into the study. After an overnight fast, echo-Doppler ultrasonography (basal and 30 min after a standard meal) and hemodynamic studies by hepatic vein catheterization (basal, 15 min and 30 min after a standard meal) were performed. Ensure Plus (Abbot Laboratories, North Chicago, IL) was used as the standard liquid meal. Correlation analysis of the echo-Doppler and hepatic vein catheterization measurements were done for the basal and postprandial ***: Eleven patients with cirrhosis (5 Child A, 4 Child B, 2 Child C) were enrolled into the study. After the standard meal, 8 of the 11 patients showed postprandial hyperemia with increase in portal blood flow, portal blood velocity and hepatic venous pressure gradient. Hepatic venous pressure gradient in the postprandial period correlated positively with postprandial portal blood velocity (r = 0.8, P < 0.05) and correlated inversely with postprandial superior mesenteric artery pulsatility index (r = -1, P < 0.01).CONCLUSION: Postprandial hyperemia can be efficiently measured by echo-Doppler ultrasonography and the results are comparable to those obtained with the hemodynamic studies.

关键词： Postprandial hyperemia Echo-Doppler Hemodynamic study Cirrhosis Portal hypertension Portal pressure

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