Table 3
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Dose volume indices for planning target volume and organs at risk

StructureIndexMedianMinimumMax
BodyDmax77.7 Gy76.8 Gy79.3 Gy
PTV initialD50%57.9 Gy51.8 Gy69.6 Gy
PTV boostD50%73.7 Gy73.3 Gy73.9 Gy
Spinal cord PRVDmax36.6 Gy27.1 Gy41.9 Gy
Brainstem PRVDmax29.2 Gy19.9 Gy36.6 Gy
MandibleD2 cm371.5 Gy49.9 Gy71.7 Gy
Parotid_ipsilateralDmean25.3 Gy12.8 Gy38.1 Gy
Parotid_contralateralDmean18.8 Gy7.2 Gy24.1 Gy
Larynx out of PTVDmean39.0 Gy20.9 Gy47.3 Gy
Constrictor muscle out of PTVDmean37.7 Gy26.9 Gy45.6 Gy
Cochlea_ipsilateralDmean12.2 Gy1.6 Gy26.8 Gy
Cochlea_contralateralDmean9.4 Gy1.5 Gy26.5 Gy
BrainDmax38.7 Gy10.7 Gy49.2 Gy
StructureIndexMedianMinimumMax
BodyDmax77.7 Gy76.8 Gy79.3 Gy
PTV initialD50%57.9 Gy51.8 Gy69.6 Gy
PTV boostD50%73.7 Gy73.3 Gy73.9 Gy
Spinal cord PRVDmax36.6 Gy27.1 Gy41.9 Gy
Brainstem PRVDmax29.2 Gy19.9 Gy36.6 Gy
MandibleD2 cm371.5 Gy49.9 Gy71.7 Gy
Parotid_ipsilateralDmean25.3 Gy12.8 Gy38.1 Gy
Parotid_contralateralDmean18.8 Gy7.2 Gy24.1 Gy
Larynx out of PTVDmean39.0 Gy20.9 Gy47.3 Gy
Constrictor muscle out of PTVDmean37.7 Gy26.9 Gy45.6 Gy
Cochlea_ipsilateralDmean12.2 Gy1.6 Gy26.8 Gy
Cochlea_contralateralDmean9.4 Gy1.5 Gy26.5 Gy
BrainDmax38.7 Gy10.7 Gy49.2 Gy

PTV, planning target volume; PRV, planning organ at risk volume; Dmax, max dose to structure; D50%, minimal dose to most exposed 50% of structure; Dx cm3, minimal dose to most exposed 2 cm3 of structure; Dmean, mean dose to structure.

Table 3
Open in new tab

Dose volume indices for planning target volume and organs at risk

StructureIndexMedianMinimumMax
BodyDmax77.7 Gy76.8 Gy79.3 Gy
PTV initialD50%57.9 Gy51.8 Gy69.6 Gy
PTV boostD50%73.7 Gy73.3 Gy73.9 Gy
Spinal cord PRVDmax36.6 Gy27.1 Gy41.9 Gy
Brainstem PRVDmax29.2 Gy19.9 Gy36.6 Gy
MandibleD2 cm371.5 Gy49.9 Gy71.7 Gy
Parotid_ipsilateralDmean25.3 Gy12.8 Gy38.1 Gy
Parotid_contralateralDmean18.8 Gy7.2 Gy24.1 Gy
Larynx out of PTVDmean39.0 Gy20.9 Gy47.3 Gy
Constrictor muscle out of PTVDmean37.7 Gy26.9 Gy45.6 Gy
Cochlea_ipsilateralDmean12.2 Gy1.6 Gy26.8 Gy
Cochlea_contralateralDmean9.4 Gy1.5 Gy26.5 Gy
BrainDmax38.7 Gy10.7 Gy49.2 Gy
StructureIndexMedianMinimumMax
BodyDmax77.7 Gy76.8 Gy79.3 Gy
PTV initialD50%57.9 Gy51.8 Gy69.6 Gy
PTV boostD50%73.7 Gy73.3 Gy73.9 Gy
Spinal cord PRVDmax36.6 Gy27.1 Gy41.9 Gy
Brainstem PRVDmax29.2 Gy19.9 Gy36.6 Gy
MandibleD2 cm371.5 Gy49.9 Gy71.7 Gy
Parotid_ipsilateralDmean25.3 Gy12.8 Gy38.1 Gy
Parotid_contralateralDmean18.8 Gy7.2 Gy24.1 Gy
Larynx out of PTVDmean39.0 Gy20.9 Gy47.3 Gy
Constrictor muscle out of PTVDmean37.7 Gy26.9 Gy45.6 Gy
Cochlea_ipsilateralDmean12.2 Gy1.6 Gy26.8 Gy
Cochlea_contralateralDmean9.4 Gy1.5 Gy26.5 Gy
BrainDmax38.7 Gy10.7 Gy49.2 Gy

PTV, planning target volume; PRV, planning organ at risk volume; Dmax, max dose to structure; D50%, minimal dose to most exposed 50% of structure; Dx cm3, minimal dose to most exposed 2 cm3 of structure; Dmean, mean dose to structure.

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