Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated suggestive of underlying COPD . Linear opacities within the lung bases likely reflect subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . Heart size is top normal . Mediastinal and hilar contours are unchanged . No pulmonary vascular engorgement is present . Deformity of the left proximal humerus suggests a remote fracture . There is diffuse demineralization of the osseous structures with unchanged loss of height of a vertebral body at the thoracolumbar junction .
    OUTPUT:
    
Mild bibasilar atelectasis .