Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without consolidation or edema . There is no pleural effusion or pneumothorax . Again noted is mild prominence of the upper mediastinum . This is unchanged from prior exams . A recent CT of the chest showed no mediastinal abnormalities and it is likely related to the orientation of the vasculature . Mild enlargement of the cardiac silhouette is stable .
    OUTPUT:
    
No acute cardiopulmonary process .