Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated with stable left lower lobe atelectasis and elevation of left hemidiaphragm . No new focal opacity . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Limited assessment of osseous structures are notable for old left - sided rib fractures .
    OUTPUT:
    
No acute cardiopulmonary process . No pneumonia .