Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal size and cardiomediastinal silhouette is within normal limits . Lungs are symmetrically expanded and clear . There is no pleural effusion or pneumothorax . No pulmonary edema . Deformity of the right anterior third rib may relate to prior injury .
    OUTPUT:
    
No acute intrathoracic process .