Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been significant interval improvement in large left effusion with a small amount of remnant fluid and associated compressive atelectasis as well as a linear streak of atelectasis in the lingula . Remainder of the lungs is clear . There is no pneumothorax . Cardiomediastinal silhouette and hilar contours are normal .
    OUTPUT:
    
Small remnant left pleural effusion status post thoracentesis without evidence of pneumothorax .