Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Both lungs are well expanded and without any opacities concerning for pneumonia or aspiration or atelectasis . There is no pulmonary edema . Heart size is top normal and mediastinal and hilar contours are unremarkable . There is evidence of prior median sternotomy and sternal sutures are intact with surgical clips in the mediastinum probably for and prior CABG . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No pneumonia or pulmonary edema .