Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart is mildly enlarged though this appears stable . Subtle lower lung opacity is most attributable to the bronchovascular crowding in the setting of low lung volumes . There is no definite signs of pneumonia or CHF . No large effusion or pneumothorax is seen . Mediastinal contour is normal . Imaged osseous structures are intact .
    OUTPUT:
    
No acute findings in the chest . Stable cardiomegaly .