Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear of airspace or interstitial opacity . The cardiomediastinal silhouette is unremarkable . No pleural effusions or pneumothorax . Focal triangular opacity over the right hemidiaphragm could represent focal scarring versus anatomic variant . No aggressive osseous lesions .
    OUTPUT:
    
No acute intrathoracic disease .