Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs appear clear without focal consolidation , pleural effusion , or pneumothorax aside from minimal retrocardiac atelectasis . Ovoid opacity over the right lower hemithorax with surgical clip is compatible with the patient 's history of right mastopexy . The heart is normal in size , normal cardiomediastinal contours .
    OUTPUT:
    
No acute intrathoracic process .