Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The previously seen opacity in the right middle lobe is not present on today 's study . The lungs remain otherwise clear . There are no pleural effusions . Heart size , mediastinal and hilar contours are normal . Again noted is a pectus deformity and degenerative changes in the spine .
    OUTPUT:
    
1 . Resolution of focal right middle lobe opacity .