Table 3: Average values of minimum and maximum doses ( 1σ) to the PTV and corresponding improvement ratios for MLC-160 vs. m3 systems.

Group

DPTV (%)

m3

MLC-160

IR (%)

p-value

I (n = 36)

Dmin

0.98 0.01

0.97 0.01

-0.69 1.10

< 0.001

 

Dmax

1.04 0.01

1.04 0.01

0.01 0.53

0.694

II (n = 16)

Dmin

0.97 0.01

0.96 0.02

-0.41 1.54

0.315

 

Dmax

1.08 0.02

1.08 0.02

-0.02 0.54

0.275

III (n = 15)

Dmin

0.86 0.14

0.85 0.12

-0.39 11.98

0.489

 

Dmax

1.13 0.08

1.13 0.07

-0.30 2.63

0.946

IV (n = 23)

Dmin

0.92 0.08

0.88 0.08

-3.58 4.43

< 0.001

 

Dmax

1.12 0.06

1.12 0.07

0.75 3.13

0.153