Helical Tomotherapy for Inoperable Breast Cancer: A New Promising Tool

Table 2

Parameters for organs at risk (OAR) during HT planning.

OAR	Priority	Blocking	Importance	Histogram dose-volume points
Contralateral lung	1	Directional	1000	5%-7 Gy
				30%-3 Gy
				50%-2 Gy
Heart	2	Directional	1000	15%-10 Gy
				5%-15 Gy
Homolateral lung	3	Directional	1000	50%-5 Gy
				15%-20 Gy
				5%-30 Gy
Contralateral breast	4	Directional	1000	10%-3 Gy
Spinal cord	5	Directional	300	30%-10 Gy
Liver	6	Directional	300	20%-5 Gy