Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded . Increased interstitial markings are seen diffusely throughout . Cardiac silhouette is enlarged . Median sternotomy wires and mediastinal clips are identified . Linear bibasilar opacities are seen potentially atelectasis noting that infection is not excluded . Left chest wall dual lead pacing device is identified . Deformity of the proximal left humerus suggests prior fracture .
    OUTPUT:
    
Increased interstitial markings throughout the lungs which could be chronic in nature although interstitial edema is possible . Bibasilar opacities potentially atelectasis noting that infection is not excluded .