Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are moderately well inflated and clear . No pleural effusion or pneumothorax . There is stable mild cardiomegaly . Mediastinal contour and hila are unremarkable . Limited assessment of the osseous structures are notable for mild multilevel degenerative changes of the thoracic spine . No displaced rib fracture .
    OUTPUT:
    
No acute cardiopulmonary process .