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primary photons
primary charged
particles
deposited
primary energy
Bremsstrahlung and
annihilation photons
charged particles from
Bremsstrahlung and
annihilation photons
scattered primary
photons
charged particles from
scattered prim. photons
deposited scatter
energy
Bremsstrahlung and
annihilation energy
deposited
energy deposited by
contaminant electrons
secondary photons
(head scatter)
secondary charged particles
scattered secondary
photons
charged particles from
scattered sec. photons
deposited scatter
energy
Bremsstrahlung and
annihilation energy
deposited
deposited
secondary energy
Bremsstrahlung and
annihilation photons
charged particles from
Bremsstrahlung and
annihilation photons
contaminant electrons
Photons from
Target
air
primary collimator,
flattening filter
,
leaves&jaws
charged particle
kinetic energy
photon radiant
energy
deposited energy
Contaminant
electron dose
Primary dose
Direct beam
phantom scatter dose
Head scatter
dose
deposited
pri ary energy
deposited scatter
energy
Bre sstrahlung and
annihilation energy
deposited
energy deposited by
conta inant electrons
deposited scatter
energy
Bre sstrahlung and
annihilation energy
deposited
deposited
secondary energy
adapted from Ahnesjö
and Aspradikis 1999
(PMB 44(11))