Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest redemonstrates severe cardiomegaly . The lungs are clear without pneumothorax or large effusion . Previously seen lucency in the left lung base is much less conspicuous on this upright radiograph . Lumbar scoliosis is unchanged . No discernable displaced rib fracture .
    OUTPUT:
    
No radiographic evidence to suggest free intraperitoneal air . Additional findings are unchanged since recent preceding radiograph .