2017_IGRT course book

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