Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate clear lungs bilaterally . Cardiomediastinal and hilar contours are within normal limits . There is no pneumothorax or evidence of pulmonary edema . Blunting of the right costophrenic angle may reflect a trace pleural effusion or alternatively focal pleural thickening . No air under the right hemidiaphragm is present .
    OUTPUT:
    
No acute intrathoracic abnormality .