Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is limited as the left lung base is excluded from the field of view . The heart size is mildly enlarged . Smooth left superior mediastinal fullness may reflect mediastinal lipomatosis . The aortic knob is well defined . The hilar contours are normal . The pulmonary vascularity is not engorged . No large focal consolidation , large pleural effusion or pneumothorax is identified given the limitations of this exam .
    OUTPUT:
    
Limited assessment of the left lung base . Otherwise , no acute cardiopulmonary abnormality .