Early X- ray and CT Manifestations of Severe Acute Respiratory Syndrome

摘要

Objective to study early X-ray and CT findings of severe acute respiratory syndrome . Methods chest radiography and CT were performed in 28 patients with severe acute respiratory syndrome within 1 to 3 days after onset. CT examinations include conventional spiral CT and HRCT. The findings on the radiography and CT images were analyzed. Results All patients had abnormal CT findings, but chest X - ray abnormals only were observed in 17 cases (60.7%, 17/28). Single small focal patchy opacity was found in 23 cases (82%, 23/28) on CT. Among them, oval ground - glass opacities were found in 20 cases, lobular distribution opacities in 2 cases and extensive opacities in 3 cases.31 lesions were found in 28 cases.Their distributions were as follows: upper lobes in 22.6% ,middle lobe in 9.7% and lower lobes in 67.7 % . The most lesions diameter ranged from 20 to 35 mm. Conclusion The main imaging features of severe acute respiratory syndrome on the early stage is focal patchy opacities. Oval small ground- glass opacities are the most dominant morphological findings on CT.