Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are grossly clear . Sternotomy wires , pacer leads , and coronary stents are unchanged in position . Cardiomediastinal and hilar contours are stable . Eventration of the right hemidiaphragm is unchanged . There is no pleural effusion or pneumothorax . There is no evidence of free air beneath the diaphragm . There are no rib fractures identified .
    OUTPUT:
    
No significant change from prior . No evidence of pneumonia , rib fracture , or effusion .