Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The cardiac , mediastinal , and hilar contours appear unchanged , with the heart size within normal limits . The aortic knob remains calcified . The pulmonary vascularity is not engorged . Linear opacities in both upper lobes reflect areas of scarring as demonstrated on the prior CT . No new focal areas of consolidation are present . No pleural effusion or pneumothorax is visualized . There are no acute osseous abnormalities . Left humeral head prosthesis is partially imaged .
    OUTPUT:
    
No new areas of consolidation to suggest pneumonia . Bilateral upper lobe linear opacities compatible with areas of scarring .