ABSTRACT
Evaluating the hazards and beneficiary of the chest - CT imaging for patients of COVID-19
Subjects and Methods: -
A total number of 160 suspected Covid-19 patients were classified into four groups (GP1(n=40) ,GP2(n=40) and GP3(n=40)).
The groups undergoing CT chest examination (Toshiba, Activion 16) .The acquisition protocols for the different groups were as follows: GP 1 ((n=40), 100 Kv , 160 ±15 mAs , GP2 ((n=40) , 120 Kv , 150 ±20 mAs) , GP3((n=40) , were 120 Kv Sure Exposure (SE), GP4((n=40) , 100 Kv , Sure Exposure (SE)) . and the other parameters are (pitch=1.5; rotation time=0.75 sec; matrix size 512x512), All images were reconstructed by Filtered Back Projection.

Results:-

The CTDI volume for the different groups were: (GP1: 7.8±0.09 mGy ; GP2: 26.4 ±0.25mGy; GP3: 16.8 ±4.7mGy; GP4: 5.5±0.1mGy , P In contrast, CNR and SNR were insignificantly different (P>0.05) among all groups. GP1and GP4 has a highly significant noise (P<0.05), in comparison with GP2 and GP3.
Conclusion:
The study demonstrates that chest CT performed with 100 kV protocol and dose modulation (