Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lordotic positioning . Possible background hyperinflation . The heart is not enlarged . The aorta may be slightly unfolded . There is upper zone redistribution , but no overt CHF . No focal infiltrate or effusion is identified . There is no focal consolidation , pleural effusion , or pneumothorax in the lungs .
    OUTPUT:
    
Upper zone redistribution noted , without overt CHF . Otherwise , no acute pulmonary process .