Clinical value of X-ray plain film in the diagnosis of early lung cancer / 中国基层医药

ABSTRACT

Objective To evaluate the diagnostic value of X ray film in early lung cancer.Methods 100 patients with pulmonary nodules were selected as the subjects.X-ray examination was performed.The histopathological findings were the gold standard.The diagnostic efficacy of X-ray plain film in early lung cancer was analyzed.The diagnostic accuracy,radiation dose and characteristics of lesions were compared between X ray and CT.Results 47 cases of lung cancer were diagnosed by X-ray plain film,5 cases of benign lesions were diagnosed as malignant,and 9 cases of malignant lesions were diagnosed as benign.The diagnostic sensitivity,specificity,positive predictive rate,negative predictive rate and diagnostic coincidence rate were 83.9％,88.6％,90.4％,81.3％ and 86％,respectively.Comparison of X-ray and CT in the overall diagnosis of early lung cancer(86％ vs 93％),the difference was not statistically significant(x2 =2.647,P ＞ 0.05).But the effective radiation dose of X ray radiography was lower than CT scan [(0.16 ± 0.02)mGy/cm vs.(0.89 ± 0.03)mGy/cm],the difference was statistically significant(t =10.475,P ＜ 0.05).Comparison of X-ray and CT in the diagnosis of early lung cancer with minute lobe,burr,cavity and calcification,the difference was not statistically significant(P ＞ 0.05).But the X-ray film showed a significantly lower rate of grinding glass stove than CT(3.6％ vs.16.1％),the difference was statistically significant (x2 =4.940,P ＜ 0.05).Conclusion X ray film has high diagnostic accuracy in the diagnosis of early lung cancer,and with low price,low radiation dose,it is suitable for routine screening.