Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volume remains low . Bibasal opacities have slightly increased changed when compared to the prior examination . There is no pulmonary edema . The cardiomediastinal silhouette is unremarkable . No pneumothorax .
    OUTPUT:
    
Slight interval worsening of the left basilar pneumonia , the right lower lobe pneumonia is stable .