Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is detected . Heart and mediastinal contours are within normal limits . Pacing hardware appears similarly positioned compared to prior . Aortic valve replacement hardware appears similarly positioned on these views . Sternal wires appear intact . Degenerative changes are seen in the spine .
    OUTPUT:
    
No radiographic evidence for acute cardiopulmonary process .