Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are noted along with obscuration of the left costophrenic angle , likely representing a pleural effusion . There is mild pulmonary vascular congestion . The right IJ catheter terminates in the right atrium . There is no focal consolidation or pneumothorax . Median sternotomy wires and aortic valve replacement are noted . There is no change in the cardiomediastinal silhouette .
    OUTPUT:
    
Left pleural effusion and mild pulmonary vascular congestion .