Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . A dual - lead pacemaker / ICD device , appears unchanged . The cardiac , mediastinal and hilar contours appear stable . There is similar patchy opacity at each lung base suggesting minor atelectasis or scarring . Otherwise , the lungs appear clear . Acute process is doubtful .
    OUTPUT:
    
Low lung volumes with similar patchy minor opacities at the lung bases , most suggestive of minor atelectasis . No definite evidence of acute cardiopulmonary disease .