Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no definite focal consolidation or pneumothorax . Haziness at the right base most likely represents atelectasis ; however , infectious process can not be completely excluded . There is prominence of the central pulmonary vasculature with upper zone redistribution , which is mostly unchanged from the prior exams and likely due to chronic CHF . The heart is enlarged , but unchanged from the prior exam . The aorta is tortuous with calcifications at the arch .
    OUTPUT:
    
Haziness at the right base most likely atelectasis ; however , infectious process can not be entirely excluded . Please refer to subsequent CT for further details .