Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . Cardiomediastinal and hilar contours are unremarkable . Prominence of the right hilus is only insinuated behind the mediastinal shadow due to a slight rotation of the patient 's position but is unchanged from the prior examination . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .