Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are noted to be slightly low . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is seen . The heart size is top normal . The ascending aorta is mildly prominent , unchanged from the prior exam , and may be secondary to aortic tortuosity versus mild dilation .
    OUTPUT:
    
No radiographic evidence for acute cardiopulmonary process .