Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is minimal vascular engorgement , but there is minimal vascular engorgement and some interstitial prominence , but no focal opacities . The heart is mildly enlarged , with significant contribution from the right atrium . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia . Mild cardiomegaly .