Use Dose Bricks Concept to Implement Nasopharyngeal Carcinoma Treatment Planning

Table 1

The overall beam parameters in Dose Bricks concept treatment planning.

Parameter/field size	RSAO	LSAO	LAO	RAO	SIV
Prescribe dose (cGy)	90	90	45	45	25
Reference point	RSAO/LSAO^a	RSAO/LSAO^b	LAO^c	RAO^d	SIV^e
Relative weighting	50%	50%	100%	100%	100%
Gantry angle	260	98	180	172	261
Couch angle	120	250	180	180	90
Collimator angle	180	172	153	199	175
Field size (𝑌1/𝑌2×𝑋1/𝑋2)	6/2×2/4	6/2×5/2	6/1×2/5	9/1×5/2	4/4.5×3/1
Wedge/Orientation	60°/out^f	60°/out	45°/left^g	45°/right^h

a~e: the abbreviation of a~e see contains in the text.
f: wedge orientation out means “thick head” toward gantry side.
g: wedge orientation left means “thick head” toward patient right side.
h: wedge orientation right means “thick head” toward patient left side.