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Table 1 Dosimetric parameters

From: Dosimetric comparison of carbon ion radiotherapy and stereotactic body radiotherapy with photon beams for the treatment of hepatocellular carcinoma

  Carbon ion radiotherapy SBRT with photons P value
PTV D90 59.6 ± 0.2 (GyRBE) 56.6 ± 0.3 (Gy) p < 0.05
HI 1.19 ± 0.03 1.21 ± 0.01 p = 0.61
CI 0.79 ± 0.06 0.37 ± 0.02 p < 0.05
Mean liver dose 8.1 ± 1.4 (GyRBE) 16.1 ± 2.5 (Gy) p < 0.05
Liver V5 20.2 ± 3.2 % 53.8 ± 7.2 % p < 0.05
Liver V20 14.2 ± 2.5 % 31.5 ± 6.2 % p < 0.05
Liver V30 11.6 ± 2.3 % 19.7 ± 4.1 % p = 0.11
Liver V50 8.5 ± 1.8 % 9.7 ± 2.1 % p = 0.67
D max of GI tract 8.4 ± 4.3 (GyRBE) 17.4 ± 7.1 (Gy) p = 0.29
  1. Abbreviations: PTV D90 Minimum dose covering the 90 % of planning target volume, HI Homogeneity index, CI Conformity index, V5-50 Volume of liver received more than 5 Gy to 50 Gy, GI tract Gastrointestinal tract