Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slightly rotated positioning . Heart size is at the upper limits of normal . Aorta is mildly tortuous . There is upper zone redistribution , but no overt CHF . No focal infiltrate , consolidation , or effusion is detected . Minimal atelectasis at the left base .
    OUTPUT:
    
No focal infiltrate to suggest pneumonia . Mild upper zone redistribution .