Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . Widening of the superior mediastinum is noted , and could reflect possible mediastinal lipomatosis . Pulmonary vascularity is not engorged . Assessment of the lung parenchyma is somewhat limited due to suboptimal penetration . There is probable mild bibasilar atelectasis , but no focal consolidation , pleural effusion or pneumothorax is identified . No acute osseous abnormalities are seen .
    OUTPUT:
    
Widened mediastinum may be secondary to mediastinal lipomatosis . Consider comparison with prior radiographs or chest CT for further assessment if there is concern for mediastinal abnormality .