CT Manifastation of Severe Acute Respiratory Syndrome and Its Diagnostic Value

摘要

Objective To assess the CT manifestation and dynamic evolulution of severe acute respiratory syndrome(SARS) and its diagnostic value. Methods Radiographs and HRCT of 60 cases diagnosed as SARS were performed on admission and every 4-6 days afterwards. The CT findings were analysed and correlated with those on radiographs. Results In 25 cases at the initial stage of the disease CT demostrated pulmonary small patchy density in 22 cases, most of them were of ovoid ground -glass - like density. CT demostrated large areas of opacity in 3 cases. Radiography demonstrated ill - defined patchy density in 16 of the 25 cases. After the initial stage, multiple large areas of infiltration were seen in all the cases, including uniform ground - glass - like density in 10 cases, ground - glass - like density with consolidation in 45, and predominantly consolidation in 5. After 10 - 14 days of admission, obvious progress of the lesion was found in 50 cases, resolution of the lesion in 10 and increased interstitial hyperplasia in 4. Conclusion HRCT demonstrates the density, contour and extent of the pulmonary lesion of SARS most clearly especially in the early stage of the disease; it provides important information for early diagnosis of SARS.