Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires again noted with mediastinal clips and a prosthetic aortic valve . Additionally , clips are noted in the right subclavian region . There is similar overall appearance of the cardio mediastinal silhouette which is prominent and reflects known aortic dissection and aneurysm . Lungs are clear without focal consolidation , large effusion or pneumothorax . No signs of congestion or edema . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No significant interval change . Prominence of the cardiomediastinal contour is stable .