Skip to main content

Advertisement

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