Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As seen on the thoracic spine films from earlier the same day there is severe volume loss in both lower lungs as seen by retrocardiac opacities . The right mainstem bronchus in particular is deviated downward secondary to this volume loss however . There has been some slight improved aeration in the right mid lung
    OUTPUT:
    
Bilateral lower lobe volume loss more extensive on the right than on the left . Is unclear if this is all volume loss or if an underlying infiltrate is also present