Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is no definite consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette appears within normal limits aside from atherosclerotic calcifications along the aortic knob and descending aorta . There is no pleural effusion or pneumothorax . There is no free air below the right hemidiaphragm . The right seventh and eighth posterior ribs appear fractured , new from prior exam . There is a vascular stent partially imaged in the left upper arm .
    OUTPUT:
    
Acute fractures involving the right seventh and eighth posterior rib arches . No pneumothorax .