Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unchanged and within normal limits . Pulmonary vascularity is not engorged . Left basilar pleural thickening and linear opacification in the left lung base compatible with fibrosis appear unchanged compared to the prior study . No new areas of parenchymal opacification are present . There is no pleural effusion or pneumothorax demonstrated . Multiple old bilateral rib fractures are again visualized . Multilevel degenerative changes within the thoracic spine are redemonstrated .
    OUTPUT:
    
No significant interval change from the prior study . No new areas of parenchymal opacification to suggest pneumonia .