Dose Course 2018_Flipping book

Principle of absorbed dose measurements Reference conditions

Detector: air (ionisation chamber)

Med: Water

For reference irradiation conditions:

Fixed field size 10x10 cm2

Fixed depth 10cm

Fixed SSD 100cm

D

= M* · k i

·N

w,Q

D,w

N

= α ·k l

·f

·P

D,w

Q,ideal

Q

Calibrated in terms of water absorbed dose in 60 Co-radiation in units of Gray per Coulomb