Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . Cardiac silhouette size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Mild patchy opacities in the lung bases likely reflect areas of atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . Mild degenerative changes are noted in the lower thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis , but no focal consolidation to suggest pneumonia .