Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lung is well expanded and clear . Right lung demonstrates decreased right - sided pleural effusion with residual atelectasis but no evidence of pneumothorax . Heart remains of normal in size . Normal cardiomediastinal silhouette .
    OUTPUT:
    
Interval decrease in right pleural effusion with no evidence of pneumothorax after thoracentesis .