Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There are no definite focal consolidations . No pneumothorax . There is a chronic retrocardiac opacity , present on ___ consistent with scarring . Cardiac and mediastinal contours are normal . No pleural effusions .
    OUTPUT:
    
No evidence of consolidation . Chronic changes in left lung consistent with scarring .