Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is stable with mild cardiomegaly . There is stable opacity at the left lower lobe which could represent unchanged left lower lobe atelectasis or a left lower lobe pneumonia in the right clinical setting . Previously seen right lower lobe atelectasis improved when compared to ___ study . No pleural effusions or pneumothorax are seen .
    OUTPUT:
    
Stable left lower lobe opacification when compared with ___ study .