Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated . There are streaky retrocardiac opacities . No pleural effusion or pneumothorax . Heart is normal size . There is no pulmonary edema . The mediastinal and hilar structures are unremarkable . Sternotomy wires , some fractured , and cervical hardware are noted .
    OUTPUT:
    
Streaky retrocardiac opacities may reflect atelectasis but pneumonia is not excluded in the correct clinical setting . If necessary , a lateral view could be obtained for further evaluation .