Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP frontal view of the chest was obtained . There is new blunting of the left costophrenic angle , concerning for trace left pleural effusion . The right lung is clear . No definite focal consolidation is seen . There is no pneumothorax . Cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Blunting of the left costophrenic angle suggests a small pleural effusion .