Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which is likely within normal limits . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is normal . Linear opacities within the right lung base likely reflect subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . Clips from prior cholecystectomy are noted in the right upper quadrant of the abdomen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .