xr Flashcards
(6 cards)
1
Q
bremsstrahlung x-ray or breaking x-ray
A
Electrons pass near the nucleus which would slow down as it’s deflected. energy loss is emitted as xray
2
Q
characteristic x-ray
A
Energy release from outer shell electron promote to inner shell electron
3
Q
Beam energy
A
determine by KVP
4
Q
what is contrast
A
- High atomic number, be seen as dense material
5
Q
Why iodine is a good contrast media
A
- High atomic number favour photoelectric absorbtion
- K shell energy close to average energy of XR.
6
Q
whats stochastic effect
A
Effects that occur by chance, generally occurring without a threshold level of dose, whose probability is proportional to the dose and whose severity is independent of the dose.
