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 . There is streaky opacity in the bilateral bases which has increased over the interval , and likely represents atelectasis . There is no pneumothorax , pleural effusion , or consolidation .
    OUTPUT:
    
No acute cardiopulmonary process .