Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Decreased lung volumes are noted causing crowding of the central bronchovascular structures . There are possible small left pleural effusion . No focal consolidation or pneumothorax is seen . The heart is normal in size given the low lung volumes . The bones are diffusely demineralized which limits assessment .
    OUTPUT:
    
Low lung volumes with possible left pleural effusion .