Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are exceedingly low , which limits evaluation and results in crowding of the bronchovascular structures . Within this limitation , there is no pleural effusion , pneumothorax or definite focal airspace consolidation . The cardiac and mediastinal contours are unremarkable . A large amount of air is seen within the stomach .
    OUTPUT:
    
No definite acute cardiopulmonary process accounting for low lung volumes .