They were split into 2 groups: group 1 (131 unvaccinated patients), and group 2 (103 fully vaccinated patients). Patients underwent high resolution computed tomography (HRCT) of the chest. All scans were evaluated, and CT severity score (CT-SS) was calculated. Results: For...
The echo phase changed under the influence of doppler effect contains the information of the vital signs of the target, such as the chest displacement caused by res- piration and heartbeat. However, there is a nonlinear relationship between the received signal and the chest displacement; in ...