Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are within normal limits . The bilateral hila are unremarkable . The lungs are clear . Apparent minimal blunting of the posterior costophrenic angles on lateral view makes it difficult to exclude trace bilateral pleural effusions . There is no evidence of pulmonary vascular congestion . There is no pneumothorax .
    OUTPUT:
    
Clear lungs without focal consolidation . Difficult to exclude trace bilateral pleural effusions .