Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views the chest . Left chest wall AICD again noted with leads extending to the region the right atrium and right ventricle . Midline sternotomy wires and mediastinal clips again noted . Lung volumes are low limiting assessment . There are low lung opacities noted bilaterally which could reflect pneumonia or aspiration . Cardiomediastinal silhouette is unchanged . No large effusion or pneumothorax . No convincing signs of edema . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Lower lung opacities concerning for pneumonia versus aspiration .