Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacity at the right base likely represents atelectasis . No consolidation , pleural effusion , pneumothorax , or pulmonary edema is detected on this single view . Heart and mediastinal contours are stable . Patulous esophagus is again noted .
    OUTPUT:
    
No radiographic evidence for acute cardiopulmonary process on this single frontal view .