Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Widening of the mediastinum is compatible with known aortic aneurysm . Heart is moderately enlarged but unchanged . No pulmonary edema . The known , trace left pleural effusion is not appreciated on this study . No pneumothorax or focal consolidation worrisome for infection .
    OUTPUT:
    
Widened mediastinum compatible with known aortic aneurysm . No large effusion .