Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A bedside AP radiograph of the chest demonstrates surgical sutures and volume loss in the right upper lobe , consistent with the patient 's prior history of lobectomy . The lungs are hyperinflated , consistent with COPD . The lungs , however , are clear . There is no pneumothorax or pleural effusion . The aorta is stably tortuous , and the heart size is normal . Pulmonary vascularity is normal , and there is no pulmonary edema .
    OUTPUT:
    
No acute findings to explain patient 's desaturation event . Stable chronic findings as outlined above .