Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is unchanged with tortuous aorta , hiatal hernia and mild cardiomegaly . Linear opacity in the right lung base is similar to the remote prior study and likely represents atelectasis or scarring . . Blunting of the left posterior costophrenic sulcus likely represents a Bochdalek 's hernia . Multiple chronic appearing rib fractures are unchanged from the prior study . Hyperinflation suggests COPD .
    OUTPUT:
    
1 . No evidence of acute cardiopulmonary process . 2 . Moderate hiatal hernia . 3 . COPD