Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is hyperinflation suggestive of background COPD . Slight prominence of slight diffuse prominence of interstitial markings likely relates to chronic changes of COPD . There is no focal consolidation , pulmonary edema , or pneumothorax . A small left pleural effusion has decreased compared with the prior study . There is diffuse demineralization .
    OUTPUT:
    
1 . No evidence of acute pulmonary process . 2 . Interval decrease in small left pleural effusion .