Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Postsurgical cardiomediastinal silhouette and hilar contours are unchanged . Moderate cardiomegaly is unchanged , accentuated by very low lung volumes . There is associated bibasilar atelectasis . Lungs are otherwise clear without focal consolidation . There is no definite pleural effusion or pneumothorax . Median sternotomy wires are intact . Several CABG clips are re- demonstrated . The bones are diffusely osteopenic .
    OUTPUT:
    
No acute cardiopulmonary abnormality .