Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is top normal . The mediastinal contours are unremarkable . The hilar contours and mediastinal contours are unremarkable . Pulmonary vascularity is not engorged . There may be subtle reticulation within the lung bases , but no focal consolidation , pleural effusion or pneumothorax is present . There are minimal degenerative changes in the thoracic spine .
    OUTPUT:
    
No focal consolidation to suggest pneumonia . Minimal reticulation of the lung bases may be due to chronic changes .