Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to ___ chest radiograph , the bilateral lung volumes are again low . The heart size is top normal . There is mild pulmonary vascular congestion without overt pulmonary edema . There is a possible small left pleural effusion . T12 vertebral body compression fracture and chronic right shoulder anterior dislocation are stable and unchanged compared to a most recent study .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion without overt pulmonary edema . Possible small left pleural effusion .