title: [Dynamic observation of the features of chest radiograph in SARS patients].
abstract: OBJECTIVE
  To observe the radiological features of chest X ray in SARS patients.
  
  
  METHODS
  The chest films of 23 cases of SARS were reviewed in the study. The chest film features and site of lung involvement were studied in early stage, most severe stage and recovery stage. The sequential chest film were evaluated hemiquantitatively. The correlation between the score of lung involvement and clinical course was also studied.
  
  
  RESULTS
  The lung involvement was most common in lower lung field and outer zone both in early and acute stage. 91.3% cases had bilateral involvement and 91.2% had multifield involvement (two lung fields involvement is 47.8%, three and four lung fields involvement are both 21.7%). The ill-defined and variable opacities showed to be dominant. The improvement of acute stage lesion in 17 cases is related to the usage and increased dosage of corticosteroid, some cases showed non-parallel with symptom and chest X-ray. Hemiquantitative analysis showed there are 6 cases had second peak in X ray, the mean time of onset is 13.2 days, and lasted for 5.8 days.
  
  
  CONCLUSIONS
  The chest X ray of SARS has some features and its changes can reflect the clinical situation.
authors.affiliation: Department of Pulmonary Medicine, Peking University First Hospital, Beijing 100034, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Ma
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.forename: Chengli
authors.initials: C
authors.lastname: Que
authors.forename: Haichao
authors.initials: H
authors.lastname: Li
authors.forename: Ligong
authors.initials: L
authors.lastname: Nie
authors.forename: Guangfa
authors.initials: G
authors.lastname: Wang
authors.forename: Zhidong
authors.initials: Z
authors.lastname: Gao
authors.forename: Rengui
authors.initials: R
authors.lastname: Wang
authors.forename: Xiaoyuan
authors.initials: X
authors.lastname: Xu
authors.forename: Haiying
authors.initials: H
authors.lastname: Lu
authors.forename: Guiqiang
authors.initials: G
authors.lastname: Wang
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013902:Radiography, Thoracic; D045169:Severe Acute Respiratory Syndrome / Q000000981:diagnostic imaging* / Q000453:epidemiology