1. The CT-based Delineation of Lymph Node in the Postoperative Radiotherapy for Gastric cancer

2. The No.1 to 6 lymph nodal CTV
Blue line: the gastrical remains
Red line: the No.1 to 6 lymph nodal CTV

3. The No.7 lymph nodal CTV
Red line: the No.7 lymph nodal CTV

4. The No.8 and No.12a lymph nodal CTV
Blue line: the common hepatic artery and the proper hepatic artery
Red line: the No.8 and No.12a lymph nodal CTV

5. The No.9 lymph nodal CTV Blue line: the celiac artery;
Red line: the No.9 lymph nodal CTV

6. The No.10 lymph nodal CTV Blue line: the splenic hilum
Red line: the No.10 lymph nodal CTV

7. The No.11 lymph nodal CTV Blue line: the splenic artery
Red line: the No.11 lymph nodal CTV

8. The No.12p lymph nodal CTV Blue line: the portal vein:
red line: the No.12p lymph nodal CTV

9. The No.13 lymph nodal CTV
Red line: the No.13 lymph nodal CTV

10. The No.14v lymph nodal CTV Blue line: the superior mesenteric vein
red line: the No.14v lymph nodal CTV

11. The No.16a2 and 16b1 lymph nodal CTV
Blue line: the abdominal aorta
Red line: the No.16a2 and 16b1 lymph nodal CTV