516 / 1694
IGRT and Imaging dose…
Dose / acquisition
Patient dose for a 78Gy
treatment (2Gy fractions)
MV Electronic Portal Imaging
Device
~ 30 mSv
(3 MU, isocenter dose)*
2340 mSv
MV cone beam CT
~ 20-90 mSv
(0.005 MU/°, isocenter dose)***
1950 mSv
Stereoscopic kV-imaging
~ 0.51 mSv
(surface dose)*
40 mSv
(400 mSv, gating)
kV cone beam CT
~ 50 mSv
(surface dose)**
1950 mSv
MV CT (TomoTherapy)
~ 20 mSv
(isocenter dose)*
780 mSv
▪
* Dose measurements at UZ Brussel
▪
** D. Jaffray 2006
▪
*** J. Pouliot 2006