Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , resulting in bronchovascular crowding . Linear bibasilar opacities are again seen , minimally changed since ___ . No superimposed consolidation is definitely seen . There is no pneumothorax or pleural effusion . The heart size is top normal .
    OUTPUT:
    
No acute intrathoracic process . Bibasilar atelectasis is minimally changed since ___ .