Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size remains mildly enlarged with a left ventricular predominance . Mediastinal and hilar contours are unchanged . Mild pulmonary vascular congestion is present . Patchy opacities in the lung bases may reflect areas of atelectasis but infection is not excluded . Linear opacity within the periphery of the right mid lung field likely reflects subsegmental atelectasis . Trace bilateral pleural effusions are noted . No pneumothorax is present . Partially imaged is an inferior vena cava filter within the upper abdomen . Mild to mold moderate multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild pulmonary vascular congestion , small bilateral pleural effusions , and patchy opacities in the lung bases , likely atelectasis though infection is not excluded .