Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low but have improved since ___ . The lungs are clear . The small left pleural effusion has essentially resolved in the interim . The heart remains mildly enlarged . Median sternotomy wires appear intact and unchanged . No focal consolidation to suggest pneumonia . No pneumothorax .
    OUTPUT:
    
1 . Persistent but improved lung volumes with essential complete resolution of the small left pleural effusion . 2 . No focal consolidation to suggest pneumonia .