255 / 1245
Dose measurements
-Bragg Gray Cavity [electron sensor, range of
electrons>cavity] f
Q
=S
w,med
-If it isn’t a Bragg Gray Cavity f
Q
= [μ
en
/ρ]
w, med
D
med
= M x F
cal
x f
Q
Ionisation chambers in High Energy X-ray Beams
High density detectors such as diodes, MOSFET,
diamonds for High Energy X-ray beams
f
Q
= d·S
w,med
+(1-d) · [μ
en
/ρ]
w
,
med
d=1 small (Bragg Gray) cavities
d=0 large cavities (photon detectors)
How to go from our reading to dose to media?