Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed and compared to the prior study . Mid left lung and bilateral basilar linear opacities are unchanged since ___ and likely represent scarring . Unchanged low lung volumes likely represent chronic volume loss due to scarring . The lungs are clear without focal consolidation , vascular congestion , pleural effusion , or pneumothorax . The heart and mediastinal contours are normal .
    OUTPUT:
    
No radiographic evidence of pneumonia .