Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs appear slightly better aerated than the most recent prior study . There is no focal consolidation or pneumothorax . Again seen is hazy opacity in the left retrocardiac and basilar region , likely atelectasis as well as a small pleural effusion . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
1 . Improved aeration in the lungs . 2 . Left basilar atelectasis and small pleural effusion .