Coverage of Axillary Lymph Nodes with Tangential Breast Irradiation in Korea: A Multi-Institutional Comparison Study

Table 1

Coverage of axillary levels I and II for a total of 27 plans.

Targets	Dose-volume parameters	Mean (range)
DHS	Mean length (cm)	2.4 (−1.0–6.0)
Level I	Mean dose (Gy)	31.9 (9.9–47.9)
	(Gy)	11.8 (0.4–43.0)
	(Gy)	30.9 (1.1–48.8)
	(%)	29.0 (0.2–74.1)
	(%)	64.5 (14.9–100)
Level II	Mean dose (Gy)	22.3 (3.4–47.7)
	(Gy)	3.0 (0.3–40.0)
	(Gy)	19.3 (0.7–48.6)
	(%)	11.5 (0.0–70.1)
	(%)	45.4 (5.1–100)

DHS: distance from the humeral head to the superior border of the tangential field; : dose delivered to 95% of the target; : dose delivered to 50% of the target; : percent volume of the target receiving 95% of the prescribed dose; : percent volume of the target receiving 50% of the prescribed dose.
Minus value means that the superior border of the tangential field was set above the humeral head.