Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On the current study , there is evidence for background COPD . There is probable mild cardiomegaly . The aorta is calcified . There are patchy interstitial alveolar opacities which or most pronounced in both upper zones , extending from the suprahilar region this superiorly . There is minimal patchy opacity at the right and left bases peripherally . On the right , this extends to the infrahilar region . There is slight blunting of both costophrenic angles , but no gross effusion . No pneumothorax detected . A rounded density overlying the right lung apex medially is noted , but may represent artifact due to overlying soft tissues . Attention to this area on followup films is recommended .
    OUTPUT:
    
1 . Mild cardiomegaly . 2 . Likely background COPD . 3 . Abnormal opacities in both lungs , most pronounced in the mid and upper zones . These are of indeterminate chronicity , with an extensive differential . The differential includes infectious and inflammatory infiltrates as well as changes due to a chronic fibrotic process . Aspiration is also in the differential . This could also represent an atypical distribution of CHF , though that is considered less likely . An atypical presentation of neoplastic process is also considered less likely , but can not be entirely excluded . 4 . Rounded density right lung apex medially -- ___ artifact due to overlying soft tissues . Attention to this area on followup films is recommended .