There is an increasing interest in the role of imaging for diagnosis of COVID19. The infection causes a wide variety of imaging findings on CT scans, most typically ground-glass opacities and consolidations in the periphery of the lungs.
1. The sensitivity of chest CT to diagnose COVID-19 has been reported as high and can predate a positive viral laboratory test. Therefore, in endemic areas where the healthcare system is under pressure, hospitals with a high volume of admissions are using CT for rapid triage of patients with possible COVID-19 infection.
2. Chest CT has an important role in the assessment of COVID-19 patients with severe and worsening respiratory symptoms. Based on imaging, it can be evaluated how severely the lungs are affected, and how the patient’s disease is evolving, which is helpful in making treatment decisions.
3. There is an increasing awareness that lung abnormalities caused by COVID-19 can be found unexpectedly in CT examinations performed for other clinical indications, e.g. in patients without respiratory complaints.
AI helps in reducing the burden on clinicians. While a manual read of a CT scan can take up to 15 minutes, AI can analyze the images in 10 seconds.