Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is within normal limits . The thoracic aorta is mildly tortuous , with aortic arch calcifications , unchanged from prior . There is some platelike atelectasis in the right lower lung ; otherwise , the lungs are clear without focal consolidation . There is suggestion of a rounded opacity at the right hilum , likely a pulmonary vessel , similar in appearance to chest x-ray from ___ . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Rounded opacity near the right hilum is likely a pulmonary vessel , and appears unchanged since ___ .