Table 1.

Dose variation analysis of 15 cases by conventional and multi-leaf collimator-optimized techniques with plan comparison dose volume histogram values

3D-PTV coverage	Range of % dose distribution with 2 primary wedge fields		Range of % dose distribution with 2 primary wedge fields and 2 MLC sub fields		Range of % dose reduction
	Actual	Mean	Actual	Mean	Actual	Mean
Max-dose	107-113	111.8±2.5	103-106	106±1.7	4-7	5±0.98
Mean-dose	96-100.5	97.2±2.9	95-99.5	95±2.97	0.2-2.5	2±0.99
Modal-dose	100-105.5	102.3±1.8	99.5-103	100.9±1.5	0.2-2.5	2±0.98
Median-dose	97-103.28	100.8±2.1	96-101.5	99.2±1.79	0.3-3	2±0.88