Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is stable . Hilar contours are stable . Lung volumes are low . Bibasilar opacities given the low lung volumes are likely atelectatic ; however , infection can not be excluded by this appearance . No evidence of effusion or pneumothorax . Sternotomy wires are in place , and surgical clips project over the mediastinum . No acute bony abnormality is identified .
    OUTPUT:
    
Bibasilar opacities in the context of low lung volumes likely represent atelectatic change ; however , infection can not be excluded .