Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates hypoinflated lungs with vascular congestion and bilateral lower lobe atelectasis . Retrocardiac opacity is stable . No right pleural effusion . Small left pleural effusion is stable . No pneumothorax . Limited evaluation of the heart size due to low lung volumes . Limited assessment of the upper abdomen is within normal limits .
    OUTPUT:
    
1 . Stable small left pleural effusion and retrocardiac opacity consistent with rounded atelectasis . 2 . Mild vascular congestion .