Application of spiral CT combined with chest X-ray in early diagnosis of pulmonary infection

Abstract

Objective To investigate the effect of spiral CT combined with chest X-ray on diagnosis of early pulmonary infection. Methods Ninety-eight patients suspected with pulmonary infection from May 2016 to August 2018 in the Central Hospital of Jiamusi were selected, and all underwent spiral CT and chest X-ray. Compared with sputum culture results, the diagnostic results and value of chest X-ray examination and spiral CT combined with chest X-ray examination were compared, and the imaging signs of spiral CT in diagnosis of patients with different types of infection were analyzed. Results Among the 98 suspected cases, 52 cases were positive for pulmonary infection and 46 cases were negative. The accuracy of spiral CT combined with chest X-ray examination for pulmonary infection was significantly higher than that of chest X-ray examination (P<0.05). The diagnostic value of spiral CT combined with chest X-ray examination (positive predictive value, sensitivity, negative predictive value, specificity) in the diagnosis of pulmonary infection was higher than that of pure chest X-ray examination (P<0.05). According to sputum culture, among 52 patients with pulmonary infection, 17 cases had mixed infection, 19 cases had non-specific bacterial infection, 4 cases had viral infection and 12 cases had fungal infection. Among CT imaging signs, ground glass was the main type of virus infection; consolidation, nodule and ground glass were visible in fungal infections, consolidation was the main type of non-specific bacterial infections; and consolidation and ground glass were the main types of mixed infections. Conclusions Spiral CT combined with chest X-ray examination is of high diagnostic value in the diagnosis of early pulmonary infection, which can further identify the types of infection and provide a basis for the development of treatment programs. Key words: Early pulmonary infection; Spiral CT; Chest X-ray; Diagnostic value; CT imaging features