Objective To summarize the imaging features of high-resolution CT(HRCT) of cryptogenic pathogenic pneumonia(COP) and improve its cognitive level. Methods The radiographic features of HRCT were analyzed in 10 patients with pathologic diagnosis and 20 patients with clinical COP. Results The clinical manifestations of COP patients with cough,sputum,shortness of breath may be associated with fever,chest pain,fatigue,weight loss and other symptoms. The main lesion morphology was real shadow(20 cases),ground glas...