From the Executive Summary: "Since its identification in China in December 2019, the novel coronavirus COVID-19 [coronavirus disease 2019] has rapidly evolved into a pandemic. COVID-19 manifests with non-specific respiratory symptoms of variable severity and may require advanced respiratory support. The diagnosis of COVID-19 is currently confirmed by laboratory testing through identification of viral RNA in reverse transcriptase polymerase chain reaction (RT-PCR). Chest imaging has been considered as part of the diagnostic workup of patients with suspected or probable COVID-19 disease where RT-CR is not available, or results are delayed or are initially negative in the presence of symptoms suggestive of COVID-19. Imaging has been also considered to complement clinical evaluation and laboratory parameters in the management of patients already diagnosed with COVID-19. [...] This rapid advice guide examines the evidence and makes recommendations for the use of chest imaging in acute care of adult patients with suspected, probable or confirmed COVID-19, including chest radiography, computed tomography (CT) and lung ultrasound. It is intended to be a practical guide for health care professionals involved in the care pathway of COVID-19, from the time of presentation to a health facility to home discharge. The guidance is relevant to patients with different levels of disease severity, from asymptomatic individuals to critically ill patients."
2020 World Health Organization. Posted here with permission. Document is under a Creative Commons license and requires proper attribution and noncommercial use to be shared: [https://creativecommons.org/licenses/by-nc-sa/3.0/igo/]
World Health Organization: https://www.who.int/