Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Linear left basilar opacities are seen , presumably atelectasis versus scarring . The lungs are otherwise clear without consolidation , effusion , or pulmonary vascular congestion . Cardiomediastinal silhouette is unchanged , noting cardiomegaly . Median sternotomy wires and mediastinal clips again seen . No acute osseous abnormality is identified .
    OUTPUT:
    
No acute cardiopulmonary process .