Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size is normal . The mediastinal and hilar contours are stable . The aorta is mildly tortuous . The pulmonary vascularity is not engorged . Patchy ill - defined opacities are demonstrated within the right mid lung field and left lung base , with the finding in the right mid lung field appearing new compared to the prior study . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Patchy opacities within the right mid lung field and left lung base concerning for an infectious process .