Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A dual lead pacemaker / ICD device with leads terminating in the right atrium and ventricle , respectively , appears unchanged . The heart is mild - to - moderately enlarged . Allowing for differences in technique , the mediastinal and hilar contours appear similar . The lungs appear clear aside from patchy bibasilar atelectasis . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease .