Table 2.

The values of percentage variation in surface doses measured to a depth of 5 mm by a Markus chamber and those of the treatment planning system for intensity-modulated radiotherapy plans

Depth (mm)	Percentage variation with respect to Dmax		Percentage variation with respect to Dmean
	Mean±SD	Range	Mean±SD	Range
1	−0.15±5.46	−11.27-9.05	21.78±3.99	15.84-28.14
2	20.02±7.42	8.62-33.83	26.31±7.86	14.75-41.2
3	11.12±4.18	2.10-18.69	17.79±3.35	11.54-23.31
4	9.47±2.91	3.24-14.82	14.81±2.20	9.37-19.08
5	1.80±3.93	−4.61-10.30	7.75±3.10	1.40-13.32

SD: Standard deviation