Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , resulting in crowding of bronchovascular structures . There is no pleural effusion , pneumothorax or focal airspace consolidation . Heart is mildly enlarged . There is no evidence of pulmonary edema . The mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .