Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes resulting in bronchovascular crowding . The cardiomediastinal and hilar contours are unchanged . There is no evidence of vascular congestion , pleural effusion , pneumothorax , or pneumonia .
    OUTPUT:
    
No acute cardiopulmonary process .