Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy tube is in place . There are low inspiratory volumes . Again seen are somewhat patchy densities at both lung bases . At the right base , the opacity is slightly more confluent . At the left base , there may be slightly improved aeration . Doubt overt CHF . No gross effusion . No pneumothorax detected . Prominent patchy osteopenia noted in both proximal humeri .
    OUTPUT:
    
Bibasilar opacities are again seen , overall similar . Possible slight interval improvement at the left base . Patchy osteopenia in both humeri . Is the patient osteoporotic ?