Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . The heart size is mildly enlarged and cardiomediastinal contours are stable . The bilateral costophrenic angles are indistinct , potentially due to effusions or potentially in part due to overlying soft tissues and technique . Retrocardiac opacity could represent atelectasis or consolidation . No pneumothorax .
    OUTPUT:
    
Possible bilateral pleural effusions with small retrocardiac opacity consistent with atelectasis or consolidation .