Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . When compared with multiple prior studies , there is bilateral upper lung scarring with slight retraction of the bronchovasculature . There is no definite sign of new consolidation with relative opacity at the right heart border on the frontal view , not convincing for pneumonia . Lung volumes are low . Heart and mediastinal contours appear stable . No effusion or pneumothorax .
    OUTPUT:
    
Stable chest radiograph with upper lung scarring . Subtle opacity in the right lower lung , likely crowding of bronchovasculature .