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Table 1 Summary of dosimetric results for planning target volumes (PTV) on the cohort of 13 patients

From: Fractionated stereotactic radiotherapy of benign skull-base tumors: a dosimetric comparison of volumetric modulated arc therapy with Rapidarc® versus non-coplanar dynamic arcs

Indices

Dynamic arc (DA)

Rapidarc (RA)

p-value

D50 % (Gy) (%)

52.5 ± 1.2

52.6 ± 0.7

DA vs RA p = 0.54

100.0 ± 1.7

100.2 ± 0.2

D95 % (Gy) (%)

50.0 ± 1.2

51.3 ± 0.8

DA vs RA p = 0.006

95.2 ± 1.6

97.7 ± 0.9

D2 % (Gy) (%)

54.3 ± 1.0

53.6 ± 0.8

DA vs RA p = 0.01

103.5 ± 1.5

102.1 ± 0.6

D mean (Gy) (%)

52.2 ± 0.9

52.3 ± 0.7

DA vs RA p = 0.17

99.4 ± 1.2

99.5 ± 1.1

D98 % (Gy) (%)

49.8 ± 1.9

50.5 ± 0.8

DA vs RA p = 0.25

94.9 ± 2.9

96.2 ± 1.6

V95 % (%)

95.9 ± 5.5

98.8 ± 1.0

DA vs RA p = 0.09

V107 % (%)

0.15 ± 0.5

0.01 ± 0

DA vs RA p = 0.36

CI (%)

67.9 ± 8.3

75.2 ± 10.4

DA vs RA p = 0.04

HI

0.09 ± 0

0.06 ± 0

DA vs RA p = 0.01

  1. Data presented the mean doses of all patients ± standard deviation. Bold techniques means that this technique is superior for this organ in particular. Nb Vx% = minimum x% of prescribed dose received by the volume and Dx% is the minimum dose received by x% of the structure volume, CI Conformity Index, HI Homogeneity Index