Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prominent bilateral lower lung interstitial changes and increased opacity in the lower lungs , which could be pneumonia in the appropriate clinical setting . No pleural effusion or pneumothorax . No cardiomegaly . Mediastinal contours and hila are unchanged . Degenerative disease in the thoracic spine .
    OUTPUT:
    
1 . Prominent bilateral lower lung interstitial changes . 2 . No definite focal consolidation to suggest pneumonia , but slight prominent opacity of the bilateral lower lungs that could be pneumonia in the appropriate clinical setting .