Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to ___ , there is an increased focal opacity in the left lower lobe , concerning for aspiration . Lung volumes are mildly improved . The cardiomediastinal silhouette is unremarkable . Mild pulmonary vascular congestion remains unchanged . There is scarring and a nodular opacity in the left apex , better evaluated on prior CT . No pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Increased focal opacity in the left lower lobe , concern for aspiration . 2 . Mild pulmonary vascular congestion with improved lung volumes .