Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a single - lead pacemaker device in place . The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . Aside from minor basilar atelectasis , lung fields appear clear . There are no substantial pleural effusions . The bones appear demineralized . The patient is status post posterior lumbar fusion , incompletely assessed . Surgical clips project over the left upper quadrant .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .