Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation or pneumothorax . The cardiomediastinal silhouette is normal . The slight blunting of the left costophrenic angle likely due to a trace left pleural effusion . There is no evidence of pulmonary vascular congestion .
    OUTPUT:
    
Trace left pleural effusion . No pneumothorax .