Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , somewhat limiting the exam . Within the limitations , the lungs are clear . There is no consolidation , pulmonary edema , pleural effusion , or pneumothorax . The mediastinal contours are stable , and allowing for changes in technique , the heart size is at the upper limits of normal . This is unchanged from the prior exam . The patient is status post a sternotomy and CABG . The wires are intact .
    OUTPUT:
    
No acute cardiopulmonary process .