Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual - chamber pacemaker is unchanged in location . Heart size is stable . Lungs are relatively well aerated with no focal consolidation or pleural effusion . There are hazy interstitial markings bilaterally , which likely represent chronic scarring . No pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia or pleural effusion .