Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs again demonstrate a persistent opacity in the right posterior segment . Opacification is unchanged from prior CT . There is no new focal consolidation . The heart size is top normal . Hyperexpansion consistent with emphysema is unchanged . The cardiomediastinal silhouette is normal . Atherosclerotic calcifications of the aortic arch are noted .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Persistent perifissural opacification of the posterior segment of the right upper lobe . As stated on report of ___ this may represent a recurrent aspiration or infection and followup chest radiographs are recommended to document resolution .