495 / 1481
PTV
PTV
GTV
CTV
GTV
CTV
Parotid gland volume changes during treatment
Reference
Radiotherapy
technique
Per-treatment
imaging time
Δ pretreatment volume/
per-treatment volume
Barker 2004 2DRT/3DCRT/IMRT
3/week
-0.6%/day
Nishimura
2006
IMRT
Week 3-4
-25%
Castadot 2010
IMRT
Week 2,3,4,5
Ipsilateral: -0.9%/day
Contralateral: -1%/day
Ahn 2010
IMRT
Week 3
-24%
Barker et al.
IJROBP
2004;59:960-70.
Nishimura et al.
IJROBP
2006;64:355-62.
Castadot et al.
Radiother Oncol
2010;95:209-17.
Ahn et al.
IJROBP
2010;80:677-85.