Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overlying trauma board slightly limits evaluation . The patient is status post median sternotomy and CABG . The heart size is normal . The aortic knob is calcified . The mediastinal and hilar contours are otherwise within normal limits . Consolidative opacity in the left lower lobe is noted , which could represent an area of infection or aspiration . Right lung is grossly clear . There is no pulmonary vascular congestion or pleural effusion . No large pneumothorax is identified . No displaced rib fractures are noted . A calcified round structure is noted within the right upper quadrant of the abdomen , which could be a lymph node .
    OUTPUT:
    
Left lower lobe consolidative opacity which may represent area of infection or aspiration .