Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mediastinal and hilar contours are unremarkable . There is stable mild cardiomegaly . Lung volumes are low with bronchovascular crowding evident in the lung bases . No focal opacification concerning for pneumonia . No evidence of fluid overload . No pleural effusion or pneumothorax . Sternotomy sutures are midline and intact .
    OUTPUT:
    
Stable mild cardiomegaly . No evidence of pneumonia .