Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No free air detected beneath diaphragms . The right hemidiaphragm is elevated . Probable background hyperinflation , which can be seen with COPD . There is mild cardiomegaly . There is upper zone redistribution , but no overt CHF . The lung apices are obscured by the clavicular heads on this lordotic view . No focal infiltrate or effusion is detected .
    OUTPUT:
    
1 . No free air detected beneath the diaphragms . 2 . Incidental note made of elevated right hemidiaphragm . 3 . Mild cardiomegaly . Upper zone redistribution , but no overt CHF . 4 . Hyperinflation , suggestive of background COPD .