Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate low lung volumes . Relative to prior radiograph dated ___ , there has been little interval changes . The right hemidiaphragm appears elevated . The heart is enlarged though stable when compared to prior study . Hilar and mediastinal contours are within normal limits . Lungs demonstrate no focal opacity convincing for pneumonia . Several healed right rib fractures are noted . No acute osseous abnormality is detected . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No acute intrathoracic abnormality .