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目的 探讨严重急性呼吸综合征 (SARS)的早期X线和CT表现。方法 对 2 8例SARS患者的早期X线和CT表现进行分析。患者在发病 1～ 3d内行X线及CT检查。CT检查包括常规螺旋扫描和高分辨率CT(HRCT)。结果 2 8例中胸部CT检查均有异常所见。X线胸片发现病变者占6 0 7% (17/2 8)。影像表现可分为 :(1)单发小片状病灶 :占 82 1% (2 3/2 8)。在CT影像上病变分为 3种形态 :①类圆形磨玻璃样密度病灶 2 0例 ;②肺小叶形态的磨玻璃样密度病灶 2例 ;③小片状实变影像 1例。 (2 )多发小片状磨玻璃样病灶 2例。 (3)大片状影像 3例。 2 8例患者共发现 31个病灶 ,其分布上叶 7个 ,占 2 2 6 % ;中叶 3个 ,占 9 7% ;下叶 2 1个 ,占 6 7 7%。病灶最大径多为 2 0～ 3 5cm。结论 SARS早期X线和CT主要表现为肺内单发小片状影像。CT显示病变的形态为类圆形磨玻璃样密度病灶最为多见。
Objective To investigate the early X-ray and CT findings of severe acute respiratory syndrome (SARS). Methods Early X-ray and CT findings of 28 patients with SARS were analyzed. Patients in the onset of 1 ~ 3d X-ray and CT examination. CT examinations include conventional helical scanning and high resolution CT (HRCT). Results 28 cases of chest CT examination have abnormal findings. X-ray showed lesions accounted for 60.7% (17/2 8). Imaging performance can be divided into: (1) single small flake lesions: accounting for 82 1% (2 3/2 8). The CT images of the lesions are divided into three forms: ① class round glass-like density lesions 20 cases; ② lung lobular morphology of glass-like lesions in 2 cases; ③ small piece of solidification in 1 case. (2) Multiple small pieces of ground glass-like lesions in 2 cases. (3) 3 large flaky images. A total of 31 lesions were found in 28 patients, with 7 of the upper leaves distributed, accounting for 22.6%; 3 of middle leaves accounting for 97%; and 2 of the lower leaves accounting for 67.7% of the total. The maximum diameter of lesions is mostly 20 ~ 35cm. Conclusion X-ray and CT in early stage of SARS are mainly single lesion in lung. CT showed that the morphology of the lesion is the most common type of glass-like density lesions in round mills.