Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well expanded and clear . There are no lung opacities concerning for pneumonia . Left hemidiaphragm is mildly elevated . Heart size , mediastinal and hilar contours are normal . Mild - to - moderate sized hiatal hernia is present . No pleural effusion .
    OUTPUT:
    
No acute cardiopulmonary process . No pneumonia .