Table 2.

Differences (mean ± SD)% in DVH parameters of PTVs and OARs between the Edose reconstructions and TPS calculations of pretreatment measurements for 30 IMRT cases

Evaluated Organs	Edose vs. TPS
	∆D95 (%)	∆Dmean(%)	∆D98 (%)	∆Dmax (%)	∆Vx (%)
NPC
PTV‐GTV	−0.96 ± 1.38	0.19 ± 1.05	−1.37 ± 1.98
PTV‐GTV‐N‐R	−2.05 ± 3.03	−0.27 ± 1.35	−2.66 ± 4.56
PTV‐GTV‐N‐L	−1.85 ± 2.87	−0.15 ± 1.27	−2.19 ± 4.35
PTV‐CTV1	−0.83 ± 1.39	−0.46 ± 1.41	−0.40 ± 1.35
PTV‐CTV	−2.20 ± 1.60	0.02 ± 1.00	−2.97 ± 1.40
PTV‐CTV‐N‐L	−0.85 ± 2.18	−0.72 ± 1.70	−0.34 ± 3.37
PTV‐CTV‐N‐R	−0.83 ± 2.21	0.42 ± 1.40	−0.75 ± 1.82
Brain‐stem				−3.63 ± 2.69
Spinal				−5.64 ± 3.84
Eye‐Len‐L				−6.12 ± 5.28
Eye‐Len‐R				0.25 ± 8.73
Parotid ‐L		−4.31 ± 3.59			−5.91 ± 8.70c
Parotid ‐R		0.31 ± 3.40			1.34 ± 6.52c
Optic‐nerve‐L				−2.41 ± 6.82
Optic‐nerve‐R				−0.76 ± 6.16
Optic‐chiasma				−3.86 ± 4.65
EPC
PTV‐GTV	−1.51 ± 2.35	0.63 ± 2.14	−2.10 ± 3.44
PTV‐CTV	−2.00 ± 2.29	0.27 ± 1.16	−3.21 ± 2.33
LUNG‐L					(−1.98 ± 4.89)a/(−2.59 ± 5.01)b
LUNG‐R					(−0.09 ± 3.36)a/(−1.70 ± 4.97)b
Spinal				1.11 ± 3.35
REC
PTV‐GTV	−0.46 ± 0.94	0.79 ± 0.92	−0.43 ± 1.14
PTV‐CTV	−2.50 ± 0.95	−0.99 ± 0.56	−2.55 ± 1.94
Small bowel				−1.34 ± 2.18
Femoral head‐L		−3.07 ± 3.42			−2.28 ± 3.16b
Femoral head‐R		−0.95 ± 2.26			−1.59 ± 2.46b
Bladder		−3.55 ± 2.23			−6.12 ± 4.50d

^aindicates ∆V₅.

^bindicates ∆V₂₀.

^cindicates ∆V₃₀.

^dindicates ∆V₄₀.