Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable frontal chest radiograph . The lungs are mildly hyperinflated , consistent with asthma . There is no pleural effusion , pneumothorax or focal airspace consolidation . The heart size is normal . The mediastinal and hilar structures are unremarkable . The pulmonary vascularity is normal .
    OUTPUT:
    
No acute cardiopulmonary process .