Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to prior radiograph dated ___ , there has been no significant changes . No focal opacity is identified convincing for pneumonia . Cardiomediastinal and hilar contours are within normal limits . No overt pulmonary edema . There is no pleural effusion or pneumothorax . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute intrathoracic abnormality .