Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The mediastinal , cardiac and hilar contours appear within normal limits . Streaky left basilar opacity suggests minor atelectasis associated with a mildly elevated left hemidiaphragm , although less striking than before . Otherwise , the lungs appear clear .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .