Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior exam , there is little change . Again demonstrated are heterogeneous opacities in the in right mid and lower lung zones . There appears to be a moderate size loculated right pleural fluid collection . A patchy opacity at the left base is noted . There is no left pleural effusion . Mild pulmonary vascular congestion is new No pneumothorax is identified . There is persist prominence of the right mediastinal and hilar contours . The osseous structures are unremarkable .
    OUTPUT:
    
1 . Heterogeneous opacities in the right lung are consistent with history of pneumonia . Consider a contrast - enhanced chest CT to exclude a postobstructive process and to better characterize an apparently loculated right pleural effusion , the latter raising the possibility of empyema . 2 . New patchy opacity at the left base is nonspecific , but may reflect additional site of infection , 3 . New pulmonary vascular congestion . These above abnormalities can be further evaluated with a CT of the chest .