Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright and lateral chest radiographs demonstrate well - expanded lungs . Cardiomediastinal silhouette is unremarkable . Lungs show mild basilar atelectasis without focal consolidation . Sternotomy wires and aortic valve replacement are noted . No pleural effusion and no pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .