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10.47176/mjiri.34.174 http://scihub22266oqcxt.onion/10.47176/mjiri.34.174 33816373!8004581!33816373     free     free     free Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Med+J+Islam+Repub+Iran 2020 ; 34 (ä): 174 Nephropedia Template TP {{tp|p=33816373|t=2020. Segmentation of COVID-19 pneumonia lesions: A deep learning approach |pdf=|usr=}}{{33816373}} gab.com Text Segmentation of COVID-19 pneumonia lesions: A deep learning approach JO: Med J Islam Repub Iran http://www.kidney.de/pget.php?&tw=1&pmid=33816373 #FOAvip Background: Lung CT scan has a pivotal role in diagnosis and monitoring of COVID-19 patients, and with growing number of affected individuals, the need for artificial intelligence (AI)-based systems for interpretation of CT images is emerging. In current investigation we introduce a new deep learning-based automatic segmentation model for localization of COVID-19 pulmonary lesions. Methods: A total of 2469 CT scan slices, containing 1402 manually segmented abnormal and 1067 normal slices form 55 COVID-19 patients and 41 healthy individuals, were used to train a deep convolutional neural network (CNN) model based on Detectron2, an open-source modular object detection library. A dataset, including 1224 CT slices of 18 COVID-19 patients and 9 healthy individuals, was used to test the model. Results: The accuracy, sensitivity, and specificity of the trained model in marking a single image slice with COVID-19 lesion were 0.954, 0.928, and 0.961, respectively. Considering a threshold of 0.4% for percentage of lung involvement, the model was capable of diagnosing the patients with COVID-19 pneumonia, with a sensitivity of 0.982% and a specificity of 88.5%. Furthermore, the mean Intersection over Union (IoU) index for the test dataset was 0.865. Conclusion: The deep learning-based automatic segmentation method provides an acceptable accuracy in delineation and localization of COVID-19 lesions, assisting the clinicians and researchers for quantification of abnormal findings in chest CT scans. Moreover, instance segmentation is capable of monitoring longitudinal changes of the lesions, which could be beneficial to patients' follow-up. Twit Text FOAVip Segmentation of COVID-19 pneumonia lesions: A deep learning approach ????Med J Islam Repub Iran http://www.kidney.de/pget.php?&tw=1&pmid=33816373 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=33816373 #FOAvip English Wikipedia <ref>{{Cite pmid|33816373}}</ref> Segmentation of COVID-19 pneumonia lesions: A deep learning approach #MMPMID33816373 Ghomi Z; Mirshahi R; Khameneh Bagheri A; Fattahpour A; Mohammadiun S; Alavi Gharahbagh A; Djavadifar A; Arabalibeik H; Sadiq R; Hewage K Med J Islam Repub Iran 2020[]; 34 (ä): 174 PMID33816373show ga Background: Lung CT scan has a pivotal role in diagnosis and monitoring of COVID-19 patients, and with growing number of affected individuals, the need for artificial intelligence (AI)-based systems for interpretation of CT images is emerging. In current investigation we introduce a new deep learning-based automatic segmentation model for localization of COVID-19 pulmonary lesions. Methods: A total of 2469 CT scan slices, containing 1402 manually segmented abnormal and 1067 normal slices form 55 COVID-19 patients and 41 healthy individuals, were used to train a deep convolutional neural network (CNN) model based on Detectron2, an open-source modular object detection library. A dataset, including 1224 CT slices of 18 COVID-19 patients and 9 healthy individuals, was used to test the model. Results: The accuracy, sensitivity, and specificity of the trained model in marking a single image slice with COVID-19 lesion were 0.954, 0.928, and 0.961, respectively. Considering a threshold of 0.4% for percentage of lung involvement, the model was capable of diagnosing the patients with COVID-19 pneumonia, with a sensitivity of 0.982% and a specificity of 88.5%. Furthermore, the mean Intersection over Union (IoU) index for the test dataset was 0.865. Conclusion: The deep learning-based automatic segmentation method provides an acceptable accuracy in delineation and localization of COVID-19 lesions, assisting the clinicians and researchers for quantification of abnormal findings in chest CT scans. Moreover, instance segmentation is capable of monitoring longitudinal changes of the lesions, which could be beneficial to patients' follow-up. äSegmentation of COVID-19 pneumonia lesions: A deep learning approach (epmc).pdf DeepDyve Pubget Overpricing