Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest ( 4 exposures ) . Relative increase in lucencies within the lung apices is consistent with known emphysema . Bibasilar opacities appear similar to prior and are presumably vessels and atelectasis . There is no focal airspace consolidation that is worrisome for pneumonia . There is no pleural effusion or pneumothorax . Blunting of the left costophrenic sulcus may reflect scarring and is unchanged . The heart size is normal and there is no evidence for pulmonary edema . The mediastinal structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .