Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior radiograph , lung volumes remain low . Streaky opacity in the left lung base is likely atelectasis , and similar to the prior radiograph . No focal opacity identified at the left lung base on concurrent CT . Moderate cardiomegaly is unchanged . The mediastinal and hilar contours are stable . No pneumothorax is identified .
    OUTPUT:
    
No focal consolidation concerning for pneumonia .