Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is not enlarged . The cardiomediastinal silhouette is within normal limits . No CHF , focal infiltrate , effusion , or pneumothorax is detected . No free air seen beneath the diaphragms . Mild degenerative changes in thoracic spine incidentally noted . There is nonvisualization of the left clavicular companion shadow .
    OUTPUT:
    
1 . No acute pulmonary process identified . 2 . Nonvisualization of the left clavicular companion shadow . Clinical correlation to assess for any left supraclavicular lymphadenopathy is detected .