Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been a significant improvement of left lower lobe pneumonia . There are only some residual opacities at costodiaphragmatic sulcus . There is no pleural effusion or pneumothorax . NG tube is in adequate position . Right jugular line has been removed .
    OUTPUT:
    
Significant improvement of left lower lobe pneumonia .