Fig. 3.

a An SLA-600 3D printer was used to print the 3D template. b The 3D-printed template was fixed on the body surface after referring to the points marked. c Eight applicator needles (1.2 mm in external diameter and 10 cm in length) were inserted into the target under the guidance of the 3D-printed template and CT. d After the needles and 3D-printed template were removed, the ends of the seed strands were sutured to the skin, and liquidation of the tumor was treated by incision and drainage.