Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy and coronary artery bypass graft surgery . The cardiac , mediastinal and hilar contours appear unchanged . Linear opacities projecting over the left mid lung suggests minor atelectasis or scarring . There is no evidence for pleural effusion . There is a pleural line projecting over the left lung apex , probably a rib edge or companion shadow rather than a pneumothorax but not well delineated .
    OUTPUT:
    
Linear opacity at the left apex , probably a rib edge or companion shadow but noting an overlapping EKG lead partly obscuring the area , short - term followup with radiographs including repositioning of the lead , and potentially PA and lateral technique if possible , are suggested .