Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Bronchovascular markings are prominent . There is no focal consolidation . There is streaky density at the lung bases likely representing subsegmental atelectasis . The right pulmonary hilum remains prominent . The aorta is calcified and tortuous . Mediastinal structures are otherwise unremarkable . The bony thorax is grossly intact . Allowing for differences in technique , there is no significant change .
    OUTPUT:
    
No acute change .