Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP views of the chest provided . Stable opacification of the right hemithorax in this patient with prior right pneumonectomy . Lung is hyperinflated , though clear . No pneumothorax . Heart size could not be assessed . No definite acute fracture . Degenerative changes are partially imaged in the upper lumbar spine .
    OUTPUT:
    
No acute findings . If there is strong concern for rib fracture , dedicated rib series is recommended to further assess .