Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . There is a bulging contour along the lower mediastinum suggesting a hiatal hernia . Streaky associated opacities are apparent on the lateral view which suggests coinciding atelectasis . Otherwise , the lung fields appear clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No definite acute cardiopulmonary process . Suspected hiatal hernia .