Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bilaterally stable low lung volumes . There is bronchovascular crowding secondary to low lung volumes ; however , no focal areas of consolidation , lesions , or masses are seen . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is stable and within normal limits . Patient is status post sternotomy with sternotomy wires seen , unchanged in alignment . Previously noted fracture of the superior - most sternal wire is unchanged . Pleural surfaces are unremarkable .
    OUTPUT:
    
No evidence of infection .