Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are extremely low accentuating the cardiac silhouette and pulmonary vasculature . Given low lung volumes , there remains central pulmonary vascular congestion without interstitial edema . Heart size is likely normal given AP projection and slightly lordotic positioning . Hazy bibasilar opacities could represent atelectasis though infection is difficult to exclude in the correct clinical setting . . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes with bibasilar opacities , difficult to exclude infection in the correct clinical circumstance . Pulmonary vascular congestion without frank interstitial edema .