Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prior sternotomy was done for CABG . Mediastinal and cardiac contours are normal . A small linear density is seen only on the lateral view in the retrosternal region . This was already described in the ___ report and probably compatible with an atelectatic band . Minimal left lower lobe atelectasis is seen . The lungs are otherwise clear . There is no pneumothorax or pleural effusion . Degenerative change of the left shoulder and the spine is seen .
    OUTPUT:
    
There is no acute cardiopulmonary finding .