Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lines and Tubes : None Lungs : Moderately well inflated with bibasilar linear opacities , likely atelectasis . Pleura : Possible small left pleural effusion . No pneumothorax . Mediastinum : Unchanged cardiomegaly and mediastinal silhouette . Bony thorax : Diffuse osteopenia with unchanged appearance of right humeral prosthesis and metallic spinal stabilization hardware projecting over the lower cervical spine .
    OUTPUT:
    
Bibasilar linear atelectasis and a small left pleural effusion . Rest of the findings remain unchanged compared to the prior report .