الفهرس 
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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
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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.