Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is hyperinflation consistent with background COPD . Cardiomediastinal silhouette is unchanged at the upper limits of normal or slightly enlarged . There is upper zone redistribution . There is more focal hazy opacity in the right perihilar region , similar to the chest x-ray from ___ and similar or slightly more pronounced compared with ___ . There is subsegmental atelectasis in the retrocardiac region , increased . There is minimal blunting of the left costophrenic angle on the AP view and , on the lateral view , a small pleural effusion is present , new compared with a lateral film from ___ . Again seen is slight pleural thickening at the left chest wall inferiorly which appears to relate to an old healed rib fracture .
    OUTPUT:
    
1 . Small left pleural effusion , new compared with ___ . 2 . Upper zone redistribution , without other findings pathognomic for CHF . 3 . Hazy focal perihilar right perihilar opacity is probably similar to the prior films . As before , this could represent residual CHF , but superimposed infection is difficult to exclude . Moreover , given persistence over time , the possibility of a chronic infiltrate should also be consider . Followup imaging to confirm resolution is recommended . In the absence of resolution , further assessment with CT scan would be recommended .