Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are high , with flattening of the diaphragms , most compatible with chronic obstructive lung disease . The heart size is normal . The hilar and mediastinal contours are within normal limits and unchanged . There is no pneumothorax or focal consolidation . There is mild basilar platelike atelectasis or scarring . No fractures are detected , although sensitivity for osseous injury is limited with this technique . Wedge compression deformities are again seen at the lower thoracic spine . Posterior lumbar fusion hardware is partially imaged .
    OUTPUT:
    
Bibasilar atelectasis / scarring . No definite rib fracture .