Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . There has been significant interval decrease in size of the right - sided pleural effusion which is now small . Streaky opacities at the right lung base most suggestive of atelectasis . There is no visualized pneumothorax . Left lung remains clear . Cardiomediastinal silhouette is within normal limits without evidence of midline shift .
    OUTPUT:
    
Significant interval decrease in size of right pleural effusion . No pneumothorax .