RADT 142 unit 5 Test Questions and Answers
Which scatter radiation interacts with moderate x-rays, outer shell electrons, and photon changes direction? - Answer-Compton/modified
Which type of scatter radiation is responsible for the majority of scatter radiation reaching the image receptor (I...
RADT 142 unit 5 Test Questions
and Answers
Which scatter radiation interacts with moderate x-rays, outer shell electrons, and photon
changes direction? - Answer-Compton/modified
Which type of scatter radiation is responsible for the majority of scatter radiation
reaching the image receptor (IR)? - Answer-compton/modified
Compton/modified - Answer-photon is directed back towards the source (backscatter).
- majority of scatter radiation reaching IR
- occupational exposure
during fluoroscopy, what is the largest scattering object? - Answer-the patient
compton contributes to _ which - Answer-fog, which decreases contrast
what occurs during photoelectric radiation? - Answer-The inner shell electron is ejected,
and the outer electron fills the orbit- producing characteristic radiation
which type of scatter produces characteristic radiation - Answer-photoelectric radiation
what happens during pair production? - Answer-Occurs at 1.02 MeV or higher.
A high-energy photon comes close to the nucleus and loses it's energy
• 2 particles are emitted with opposing electrostatic charges- negatron & positron
photodisintegration - Answer-Occurs with photon energies of 10 MeV or higher.
• High energy photons strikes nucleus
• Nucleus becomes excited
• Ejects a nuclear fragment
which scatter radiation is used in diagnostic radiology? - Answer-compton and
photoelectric
which type of scatter radiation uses low energy, below 10kV, and x-ray photon loses no
energy? (No Ionization) - Answer-classical/thompson/unmodfied/Rayleigh
1. How does an increase in mAs affect the amplitude and the position of the emission
graph? - Answer-It affects amplitude only.
1. What happens to the efficiency of x-ray production as the voltage across the x-ray
tube decreases? - Answer-It decreases.
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