Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires are again noted with fragmented superior most wire . Lung volumes are low . Coronary stents project over the heart . There is no focal consolidation , large effusion or pneumothorax . No signs of congestion or edema . The heart size is normal . Mediastinal contours unremarkable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .