To study the imaging characteristics of Human infection with avian influenza A H7N9 virus patients.

Six chest X-ray examinations and Nine CT examinations were performed in 5 cases of Human infection with avian influenza A H7N9 virus that were verified by the Clinic.

In the 5 cases,3 of 4 cases showed large areas of lung consolidation and bilateral lung involvement on chest X-ray.ALL the 4 cases showed multi-lobar or multi-segmental consolidation in bilateral lungs on CT images.There was no distribution tendency for any specific pulmonary lobes or segments.There was obvious air bronchogram in the consolidation.In 3 cases,The big consolidation appeared as homogeneous opacities and ground-glass appearance.Consolidation expanded along the pulmonary segment and coalesced together to form a pulmonary segment consolidation,The foci that crossed the interlobular fissure were observed in 2 cases.Early repeated examination showed rapid lesion progress with extensive lung consolidation or ground-glass opacity in both lungs.Small amount of pleural effusion or pleural thickening was noticed in 5 cases.The meditational lymph nodes enlargement was not observed.

The imaging abnormalities on the thoracic plain film are the clues to make the diagnosis of Human infection with avian influenza A H7N9 virus,and CT can detect the pulmonary abnormalities for more details.

Influenza in birds; Radiography,thoracic; Tomography,X-ray computed