Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Midline tracheostomy tube is seen . Large - bore right - sided central venous catheter terminates in the low SVC . Patient is status post median sternotomy . The cardiac and mediastinal silhouettes are stable . Bilateral pulmonary opacities have significantly improved in the interval , with only minimal residual remaining . The lungs remain hyperinflated consistent with chronic obstructive pulmonary disease . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Significant interval decrease in previously seen bilateral pulmonary opacities with only minimal residual remaining .