Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Focal opacity at the left costophrenic angle maybe due to atelectasis or adjacent fat pad . The lungs are otherwise clear and there is no pneumothorax . The cardiac silhouette is enlarged but stable in configuration and in part likely due to prominent mediastinal fat . Median sternotomy wires and mediastinal clips are again noted as well as coronary artery stents . Degenerative changes noted at the shoulders .
    OUTPUT:
    
No acute cardiopulmonary process . If desired , dedicated rib series can be performed .