Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Moderate hiatal hernia is present . The pulmonary vasculature is normal . Lung volumes are relatively low . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Moderate sized hiatal hernia . No acute cardiopulmonary abnormality .