الفهرس | Only 14 pages are availabe for public view |
Abstract COVID-19 is an infectious disease caused by severe acute respiratory syndrome corona virus. First case was reported in Wuhan –china in December 2019 before spreading. Current outbreak officially recognized as pandemic. COVID-19 typically presented with systemic and or/respiratory manifestation. Some also experience mild GIT or CVS symptoms but less common. The typical chest CT imaging characteristics of COVID-19 include multiple, peripheral, bilateral, patchy, sub-segmental, or segmental ground glass opacities and areas of consolidation, which are mostly distributed along the bronco vascular bundles and sub- pleural space. The presence of associated interlobular septal thickening in the areas of ground glass opacity can give a crazy paving appearance. Air bronchograms with areas of consolidation and bronchial wall thickening are often present. More rarely, there is a thickening of the adjacent pleura or inter-lobar pleura, and a small amount of pleural effusion. There is no obvious lymphadenopathy. In currently available reports, the most common chest CT findings in COVID-19 patients are the peripheral areas of ground glass opacity/consolidation (without sub-pleural sparing) which are bilateral in distribution. The aim of the study was to highlight the diagnostic value of MDCT in assessment of different patterns of covid-19 pneumonia to help in proper and accurate diagnosis. To elucidate this aim, a number of 250 patients were recrruitred (50.8% female and 49.2% male) their ages ranged from 15 to 75 years with the mean age = 39.43(± 12.19 y SD). There were 164 patients (65.6%) of the studied cases presented with multilobar involvement. Summary 90 Regarding the location of ground glass opacities in, 163 patients (65.2%) of the studied cases had peripheral location, patches were peripherally located. Regarding to the most frequently affected lobes 142 patients )56.8%) presented by lower lobe involvement. Most of the studied cases had ground glass opacity 235 patients (94%), 54 patients 21.6% had consolidation. Most of the patients presented with more than one pattern There were 7 patients (2.8%) who presented with crazy paving pattern. There were 10 patients (4 %) of the studied cases with plural effusion as an associated findings. Regarding the CT severity score, half (125 patients) of the studied cases had severe involvement, 65 patients (26%) had mild score and 60 patients (24%) had moderate CT severity score. As regard to predictors of bad outcome in patients with covid 19, The significant predictors of bad outcome in patients were multilobar Involvement, GGO and higher CT severity score. In this study, CT had excellent Diagnostic performance with an AUC of 0.895 with a sensitivity of 85.93% and specificity of 83.45% in assessment of COVID- 19 manifestations. |