Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . A dual - lead pacemaker / ICD device appears in a similar position . The cardiac , mediastinal and hilar contours appear unchanged , allowing for differences in technique . The lung volumes are very low . Particularly in that setting , minimal left basilar opacities are probably associated with minor atelectasis . The lungs appear otherwise clear . There is no pleural effusion or pneumothorax . The bones are probably demineralized to some degree .
    OUTPUT:
    
Findings suggesting minor left basilar atelectasis without definite evidence for pneumonia .