Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . Noting soft tissue attenuation that obscures each costophrenic sulcus , it is difficult to exclude very small pleural effusion , although doubted . The lungs appear clear . The lungs appear hyperinflated . Bony structures are unremarkable . There has been no significant change allowing for differences in technique .
    OUTPUT:
    
Hyperinflation . No evidence of acute disease .