Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and mediastinal clips again noted . Lung volumes are low . Allowing for this , the lungs appear clear without convincing signs of pneumonia or edema . No large effusion or pneumothorax is seen . Cardiomediastinal silhouette is stable . Bony structures are intact with similar pattern of chronic degeneration at the bilateral shoulders .
    OUTPUT:
    
No acute findings .