Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is acute consolidation of left lower lobe which could be due to atelectasis but pneumonia can not be ruled out . There is bilateral small to moderate pleural effusions . Moderate to severe cardiomegaly is unchanged . Hiatal hernia is again noted .
    OUTPUT:
    
Acute left lower lobe collapse can be due to atelectasis but pneumonia can not be ruled out .