Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . The mediastinal contours demonstrate calcified atherosclerotic disease throughout the aortic arch . Calcifications are also seen about the aortic valve . A rounded density projecting over the expected region of the right atrium was compared to prior CT and reflects components of the right atrium and an epicardial fat pad . The lungs demonstrate coarsened features with mild basilar atelectasis but no evidence of pneumonia or pulmonary edema . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Minimal bibasilar atelectasis , but no acute cardiopulmonary process .