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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?