Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The patient is status post median sternotomy and CABG . Dual - lead left - sided pacemaker is seen with leads extending to the expected position of the right atrium and right ventricle . The patient is rotated somewhat to the left . Mild bibasilar opacities most likely relate to atelectasis versus aspiration rather than infection . No large pleural effusion or pneumothorax is seen . The aorta is calcified . The cardiac silhouette is not enlarged . Minimal biapical pleural thickening is seen . Old left clavicular fracture is noted . The inferior - most sternal wire is fractured .
    OUTPUT:
    
Mild bibasilar opacities , most likely due to atelectasis or possibly aspiration .