Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Heart size is normal . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Linear opacities within the left lung base are compatible with areas of subsegmental atelectasis . No pleural effusion , focal consolidation or pneumothorax is present . An 8 mm nodular opacity is seen within the right upper lung field , new in the interval . Moderate multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . 8 mm nodular opacity within the right upper lung field , new in the interval . Further assessment with chest CT is recommended on a nonemergent basis .