Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are very low . Bibasilar opacities likely reflect atelectasis . There is moderate cardiomegaly . Median sternotomy wires appear intact . Left chest wall pacer defibrillator has leads terminating in the right atrium and right ventricle . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Low lung volumes with bibasilar atelectasis . 2 . Moderate cardiomegaly .