Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The pleural surfaces are normal . Cardiac silhouette and mediastinal contours are normal . Fusion hardware of the cervical spine is partially visualized . 1 .4 - cm opacity projects over a lower thoracic vertebral body , not present on CT scan of ___ , and therefore likely a superimposition of normal structures .
    OUTPUT:
    
No acute chest abnormality .