Clinical value of X-ray plain film in the diagnosis of early lung cancer

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(χ2=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). 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(χ2=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. Key words: X-ray film; Lung tumor; Diagnosis