Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperinflated . Moderate cardiomegaly is again noted . The aorta is calcified . There is mild increase in interstitial markings bilaterally . Mild pulmonary edema is noted . There is patchy opacification at the left base and the right cardiophrenic angle which are similar to ___ . There is no definite evidence of pleural effusion or pneumothorax . The trachea is deviated to the right , unchanged from the prior examination .
    OUTPUT:
    
1 . Background COPD with cardiomegaly . 2 . Patchy opacities at both bases appear similar to the prior examination and may represent atelectasis and scarring at the bases . However , infection can not be completely excluded in the correct clinical setting . 3 . Mild prominent pulmonary vasculature may represent mild pulmonary edema . 4 . Known thyroid enlargement accounting for rightward displacement of the trachea , unchanged from the prior examination .