Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . There is a trace left pleural effusion seen best on the lateral view . There is no right pleural effusion . There is no pneumothorax . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process . Trace left pleural effusion .