Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Moderate cardiomegaly and mediastinal contours are stable . Severe enlargement of the left atrium is unchanged . No focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
No pneumonia . Stable moderate cardiomegaly and severe left atrial enlargement .