Parameters

Objective

Rapid Arc Mean ± SD

LF-IMRT Mean ± SD

p-Value (Independent Student t test)

Rapid Arc vs LF-IMRT

PTV70Gy

Mean (Gy)

70 Gy

70.56 ± 1.1

71.66 ± 1.08

0.011

RA > IMRT

D2% (Gy)

<74.9 Gy

74.32 ± 1.5

74.06 ± 1.9

NS

-

D98% (Gy)

>66.5 Gy

67.95 ± 1.2

67.22 ± 1.4

NS

-

D50% (Gy)

70 Gy

71.7 ± 1.1

70.7 ± 1.0

0.003

RA > IMRT

D80% (Gy)

70 Gy

70.52 ± 1.1

69.45 ± 1

0.002

RA > IMRT

V107 (%)

<2%

2.1 ± 1.2

2.9 ± 1.8

NS

-

HI95%

0

0.089 ± 0.02

0.097 ± 0.03

NS

-

CI95%

1

0.906 ± 0.03

0.868 ± 0.07

0.021

RA > IMRT

PTV54Gy

D2% (Gy)

<57.78 Gy

63.5 ± 3.3

64.1 ± 5.3

NS

-

D98% (Gy)

>51.3 Gy

50.4 ± 2.19

50.3 ± 2.1

NS

-

D50% (Gy)

50 Gy

56.1 ± 1.5

55.68 ± 1.9

NS

-

HI95%

0

0.097 ± 0.3

0.25 ± 0.10

<0.0001

RA > IMRT