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Preoperative CT-scan and Marking-scan images. Clip marking is performed based on preoperative 3D-CT (A) or thin-slice HRCT (B) performed prior to the day of surgery. Yellow arrows indicate GGO tumors. Intraoperative Marking-scan (C) indicating that the clip is placed on the lung surface directly above the GGO (line arrow). CT, computed tomography; HRCT, high-resolution computed tomography; GGO, ground-glass opacity.
