Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate low lung volumes . There is no pleural effusion or pneumothorax . Cardiomediastinal and hilar contours are within normal limits . There is no pulmonary edema . Opacity projecting over the right hilar region is likely summation artifact in this patient who is rotated .
    OUTPUT:
    
No acute intrathoracic abnormality .