Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are unchanged compared to prior study . There is mild cardiomegaly . No pulmonary vascular congestion , pleural effusion ___ ___ B lines seen . No consolidation ___ pneumothorax seen . The visualized bony structures are unremarkable in appearance .
    OUTPUT:
    
Mild cardiomegaly without evidence of frank pulmonary edema .