Abstract： Objective To discuss the clinical presentations and imaging features of a novel avianorigin influenza (H7N9).Methods Anteroposterior chest radiographs and serial thin-section CT images in 5 patients with H7N9 were reviewed retrospectively by two radiologists,the predominant inaging patterns of lung abnormalities and clinical data were recorded and analyzed.Results The large consolidation of the right lung with air bronchograms was the most common radiographic appearance in all patients with H7N9 at admission,and the abnormalities were more severe in the bilateral lower lobes.Both lungs developed large,scattered consolidations and ground-glass opacities with the progression of disease.The lesions in the left lung were more rapidly absorbed than those in the right lung.Conclusion Influenza H7N9 has certain chest imaging characteristics in the onset,progression and recovery of disease.