Fig. 1

The procedure of preoperative CTLG. a Fix the radiopaque grid in breast and ipsilateral axilla. b Show the lymphatic drainage pathway using three-dimensional reconstruction of the CT scanner. c Representative images of three-dimensional reconstruction using SPECTRA. d Virtual X- and Y- axis on the human body. e Operation interface of CT three-dimensional reconstruction software and CT scanner. f Adjust the bed position to "index 200.0". g Localize the specific points according to X- and Y- coordinates