Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Underlying trauma board partially obscures the view . Allowing for this , lung volumes are low but without focal opacities . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . No displaced fracture is seen .
    OUTPUT:
    
No acute intrathoracic process .