topics 5-6 Flashcards
(19 cards)
whats irradiation
the amount of radiation exposed per kg
irradiation SI units
sievert = J / Kg
whats exposure
the amount of ionising radiation produced by photon interactions per unit mass of air
exposure units
Coulomb per Kg
whats coulomb
a measure of electrostatic charges
1 C = 6.25 x 10^18
whats air kerma
the kinetic energy released when radiation hits the little particles in the air
air kerma units
J / Kg = Gya
whats radiation absorbed dose
the energy of the ionising radiation deposited by 1 kg of material
how much energy from the radiation was absorbed by the body
radiation absorbed dose units
Gray = J/Kg
whats equivalent dose
takes into account the type of radiation
equivalent dose units
sieverts = Sv
equivalent dose equation
absorbed dose x radiation weighting factor (Wr or Qf (quality factor)
whats effective dose
takes into account the biological effect on different organs
effective dose units
sievert (Sv)
effective dose equation
equivalent dose x Wt (organ weighting factor)
whats dose
how much energy from the radiation was absorbed by the body
whats the energy of a photon in terms of waves
E = hf or hc/lambda
difference between xray and gamma rays
xray originates from difference in electron energy levels
gamma rays originates from difference in nuclear (nucleus) energy levels
