Radiofrequency identification (RFID) marking procedure using cone-beam computed tomography (CBCT) in a hybrid operation theater. A, RFID marker placement was conducted using CBCT in a hybrid operation theater just before surgery. B, Intraoperative fluoroscopy showing the RFID marker successfully placed in the airway. C, Preoperative computed tomography (CT) image showing a 5-mm lesion with pure ground-glass opacity located 15.3 mm from the pleura. D-F, Post-RFID-marking CT image showing the marker placed near the target with no apparent adverse effects (transverse, coronal, and sagittal planes, respectively).