Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . Heart size is top normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Minimal patchy opacities are seen in the lung bases , likely reflective of atelectasis . No focal consolidation , pleural effusion or pneumothorax is clearly seen . Mild degenerative changes are noted in the lower thoracic spine .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis . No focal consolidation to suggest pneumonia .