Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart is borderline enlarged . The aorta remains tortuous . Hilar contours are stable . Hyperinflation of the lungs with attenuation of the pulmonary vascular markings is compatible with emphysema . Patchy ill - defined bibasilar airspace opacities are more pronounced on the left , and are concerning for an infectious process . Slight blunting of the costophrenic angles posteriorly on the lateral view likely reflects chronic pleural thickening rather than small pleural effusions . Diffuse demineralization of the osseous structures is present with mild loss of height of several mid and lower thoracic vertebral bodies , unchanged .
    OUTPUT:
    
Patchy bibasilar airspace opacities are concerning for an infectious process . Emphysema .