Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Midline sternotomy wires and mediastinal clips are noted as well as surgical clips projecting over the upper abdomen . Evaluation is somewhat limited due to subtle motion artifact on the single view provided . Allowing for this , volumes are low though the imaged portions of the lungs appear clear . Cardiomediastinal silhouette appears grossly unchanged . Bony structures are intact .
    OUTPUT:
    
Limited exam without signs of overt abnormality . Motion artifact limits evaluation .