Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . In comparison to prior study from 2 days ago , there is interval improvement in multifocal parenchymal opacities . Mediastinum is stably widened , in part due to ascending aorta enlargement or tortuosity , stable since at least ___ . Heart is mildly enlarged . Small amount of subcutaneous emphysema is noted on the right . Calcific density medial to the left glenoid is again seen .
    OUTPUT:
    
1 . No pneumonia . 2 . Mediastinal widening due to dilated or tortuous ascending aorta , unchanged since at least ___ .