Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has a single - lead pacemaker which terminates in the right ventricle . The heart is normal in size . The mediastinal and hilar contours appear unchanged . The lungs are clear aside from minimal unchanged left basilar atelectasis or scarring . There is no pleural effusion or pneumothorax . Degenerative changes along the thoracic spine are similar and a thoracolumbar compression deformity , which is partly visualized also appears similar .
    OUTPUT:
    
No evidence of acute disease .