Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate increased lung volumes , compatible with patient 's known history of extensive emphysema . Hilar and mediastinal silhouettes are unchanged . Heart size is top normal . There is no pleural effusion or pneumothorax . Bilateral reticulo - nodular opacities , most pronounced in the lower lobes , have progressed since ___ exam . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
1 . Bilateral reticulonodular opacities , most pronounced in the lower lobes , have progressed since ___ exam , and likely represent infection in appropriate clinical setting . Atypical infection is a consideration , given patient 's clinical status . Chest CT is recommended for further evaluation . 2 . Emphysema .