Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The low lung volumes are noted with crowding of bronchovascular markings . Cardiac , mediastinal and hilar contours are accentuated by low lung volumes but are unchanged from ___ . Previously noted lung base opacifications are improved , compatible with atelectasis . No pleural effusion or pneumothorax is present .
    OUTPUT:
    
No acute cardiopulmonary process .