Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are stable and within normal limits . The bilateral hila are unremarkable . The lungs are clear . Subtle opacity at the right cardiophrenic angle is most compatible with crowding of bronchovascular structures and / or mild atelectasis in the setting of a suboptimal inspiratory effort . Otherwise , the lungs are clear . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process .