Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate multiple intact sternotomy wires and aortic valve replacement . Fine reticular opacities of the lateral lung bases appear to be chronic . The lungs are otherwise clear There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Chronic fine reticular opacities of the lateral lung bases ; otherwise clear lungs .