Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires , right axillary clips and a mitral valve prosthesis are constant . Asymmetry of the right chest wall , likely from prior mastectomy . The lungs are hyperinflated , consistent with a history of COPD . Bibasilar atelectasis is unchanged . A vague opacity projecting over the spine , seen only on the lateral view , is new from prior . The heart size is normal and there is no evidence for pulmonary edema . A hiatal hernia is unchanged in size .
    OUTPUT:
    
Subtle opacity projecting over the spine on the lateral view is likely atelectasis or confluence of shadows , however , pneumonia is also a possibility . If further clarification is needed , oblique views would be useful . Attempt to page these findings to Dr . ___ by Dr . ___ at 13 : 15 on ___ were unsuccessful . As such , findings were placed on the critical results dashboard .