Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . The lung volumes are low . There is new elevation of the left hemidiaphragm with streaky basilar opacification . The lateral view suggests perhaps a trace pleural effusion at least on the right . A trace coinciding pleural effusion on the left is not excluded . The thoracic spine curves mildly to the right . An anterior flowing osteophyte is noted throughout the mid through lower thoracic spine .
    OUTPUT:
    
Left basilar opacification with volume loss ; differential considerations include pneumonia or substantial atelectasis . Correlation with clinical presentation is recommended .