Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Widening of the superior mediastinum may be due to the presence of mediastinal lipomatosis and low lung volumes . The aortic knob is calcified . Hilar contours are normal , and the pulmonary vasculature is unremarkable . No focal consolidation , pleural effusion or pneumothorax is visualized . No acute osseous abnormalities seen .
    OUTPUT:
    
Widening of the superior mediastinum may be due to the presence of mediastinal lipomatosis and low lung volumes . Consider followup PA and lateral views with improved inspiratory effort for further assessment . No acute cardiopulmonary abnormality otherwise demonstrated .