Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior , there has been improvement of previously seen bilateral opacities . The lungs are mildly hyperinflated . There are residual linear opacities in the right mid lung , may represent impacted bronchi or atelectasis . There is no significant pleural effusion . The heart size is unchanged . The mediastinal and hilar contours are unchanged . A small sclerotic focus in the left humerus and diffuse sclerotic rib lesions likely represent metastatic foci .
    OUTPUT:
    
1 . Interval improvement of bilateral opacities with residual linear opacities in the right middle lobe . 2 . Sclerotic bone lesions , likely metastatic foci .