Skip to main content

Table 2 Dosimetric analysis

From: Hippocampus-sparing radiotherapy using volumetric modulated arc therapy (VMAT) to the primary brain tumor: the result of dosimetric study and neurocognitive function assessment

Dosimetric parameters Median (range)
Hippocampus
 Contralateral
  Vol(cc) 1.8 cm3 (0.9-2.4)
  D100% 7.2Gy (0.6-11.7)
  Dmax 16.4 Gy (3.5-63.4)
  Dmean 12.3 Gy (1.3-19.7)
  Dmean (EQD2/2) 7.4 Gy2 (0.7-13.1)
 Ipsilateral
  Vol(cc) 1.7 cm3 (0.6-2.3)
  D100% 8.4 Gy (0.7-60.0)
  Dmax 40.9 Gy (5.7-64.3)
  Dmean 15.9 Gy (2.0-60.3)
  Dmean (EQD2/2) 10.3 Gy2 (1.0-63.4)
 Bilateral
  Dmean 13.4 (1.8-38.3)
  Dmean (EQD2/2) 8.3 Gy2 (0.9-31.3)
Optic nerve
 Dmax 31.7 Gy (0.5-58.5)
Optic chiasm
 Dmax 42.5 Gy (1.0-57.8)
Brain stem
 Dmax 43.3 Gy (0.2-61.5)
Eyeballs
 Dmax 13.2Gy (0.5-38.1)
Lenses
 Dmax 3.5Gy (0.4-14.0)
  1. D 100% dose to 100% volume of the structure, D max maximum dose, D mean mean dose, EQD 2/2 equivalent 2 Gy dose with α/β = 2