Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Known opacity in the right upper lobe with a new metallic density overlying 8 . No pleural effusion or pneumothorax identified . Unchanged atelectasis / scarring in the left mid lung zone . The size of the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Status post right upper lobe lesion biopsy . No pneumothorax identified .