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. 2011 Dec;23(4):259–264. doi: 10.1007/s11670-011-0259-0

Table 2. PTV dose distribution comparison of two RT techniques.

     Indices         RapidArc             IMRT              P
  PTV Dmean (Gy)         68.4±0.6            67.6±0.6            <0.05
  PTV Dmax (Gy)         74.8±0.9            73.8±0.5            <0.05
  PTV Dmin (Gy)         56.8±1.1            57.5±0.6            <0.05
  CI95%         0.78±0.07            0.78±0.07            >0.05
  HI         78.9±1.3            80.4±0.5            <0.05

CI, conformity index; HI, homogeneity index.In table 2,both of PTV Dmean and PTV Dmax in RapidArc were slightly higher and statistically significant than those in IMRT. The CI95% of RapidArc and IMRT were the same and the HI for RapidArc was lower thanthat of IMRT at statistically significant level (P<0.05).