Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slight coarsening of the interstitial markings and hyperinflation are likely due to emphysema . There is no focal opacity , pulmonary edema , pleural effusion or pneumothorax . The cardiac contours are normal . Prominence of the right hilus is unchanged over multiple prior studies dating back to ___ . There is no free air beneath the right hemidiaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .