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Radiography 3

Description

Radiography quiz on Radiation physics lecture
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Quiz by 0 9, updated more than 1 year ago
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Created by 0 9 almost 8 years ago
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Resource summary

Question 1

Question
Atomic mass is the number of...
Answer
  • Protons
  • Neutrons
  • Electrons

Question 2

Question
Atomic number is only concerned with protons
Answer
  • True
  • False

Question 3

Question
Electrons in which shell have the greatest binding energy?
Answer
  • K
  • L
  • M
  • N

Question 4

Question
If you increase atomic number, you...
Answer
  • Increase binding energy
  • Decrease atomic mass
  • Change the number of electrons

Question 5

Question
Which of these are particulate radiation?
Answer
  • Alpha rays
  • Beta rays
  • X-rays
  • Gamma rays
  • Cosmic rays

Question 6

Question
Alpha rays are more damaging than beta rays.
Answer
  • True
  • False

Question 7

Question
Capacity of particulate radiation to ionise depends on...
Answer
  • Mass
  • Velocity
  • Charge
  • Force

Question 8

Question
Wave theory states that...
Answer
  • Wavelength x Frequency = speed of light
  • Energy = plancks constant x speed of light / wavelength

Question 9

Question
Quantum theory states that...
Answer
  • Energy = Speed of light x Plancks constant / Wavelength
  • Wavelength x Frequency = Speed of light

Question 10

Question
X-rays are [blank_start]high[blank_end] energy electromagnetic radiation produced by interactions of [blank_start]electrons[blank_end] with an atomic nucleus.
Answer
  • high
  • electrons

Question 11

Question
X-rays travel at the speed of light.
Answer
  • True
  • False

Question 12

Question
X-rays produce ionisation.
Answer
  • True
  • False

Question 13

Question
Most natural background radiation is from...
Answer
  • Radon exposure
  • Food
  • Cosmic radiation
  • Medical exposure

Question 14

Question
Absorption of X-rays occurs by the...
Answer
  • Photoelectric effect
  • Compton effect

Question 15

Question
Absorption is proportional to the cube of the...
Answer
  • Atomic number
  • Atomic mass
  • X-ray energy

Question 16

Question
As well as contributing to the image, absorption gives rise to radiation dose.
Answer
  • True
  • False

Question 17

Question
Absorption is inversely proportional to the
Answer
  • Cube of the X-ray energy
  • Atomic number
  • Atomic mass

Question 18

Question
X-ray scatter produces
Answer
  • A compton recoil electron
  • A photoelectron
  • A weakened, deflected X-ray photon
  • A full energy X-ray photon

Question 19

Question
Coherent scatter tends to occur with...
Answer
  • Low energy X-ray photons
  • High energy X-ray photons

Question 20

Question
Absorption makes up the majority of X-ray interactions and 30-40% of this leads to operator dose.
Answer
  • True
  • False

Question 21

Question
Absorbed dose is measured in...
Answer
  • milliGrays
  • Microsiverts
  • Arbitrary units

Question 22

Question
Equivalent dose =
Answer
  • Radiation weighting factor x Absorbed dose
  • Tissue weighting factor x Absorbed dose x Radiation weighting factor
  • Absorbed dose x Exposure
  • Tissue weighting factor x Radiation weighting factor

Question 23

Question
Effective dose =
Answer
  • Absorbed dose x Tissue weighting factor x Radiation weighting factor
  • Absorbed dose x Radiation weighting factor
  • Absorbed dose x Tissue weighting factor

Question 24

Question
Effective dose is measured in...
Answer
  • Milligrays
  • Microsieverts
  • Arbitrary units

Question 25

Question
One OPG is roughly equivalent to..
Answer
  • 16 hours of natural background radiation
  • 3 days of natural background radiation
  • A week of natural background radiation

Question 26

Question
Which type of dental radiography carries the highest risk of fatal cancer?
Answer
  • CT scan of the Maxilla
  • Lateral cephalogram
  • OPG
  • Bitewing radiograph

Question 27

Question
New annual occupational dose limits say that non-classified workers such as dentists may be exposed up to...
Answer
  • 6 mSv
  • 20 mSv
  • 15 mSv
  • 5 mSv

Question 28

Question
Old annual occupational dose limits say that non-classified workers such as dentists could be exposed up to...
Answer
  • 15 mSv
  • 6 mSv
  • 20 mSv
  • 1 mSv

Question 29

Question
According to radiation legislation, dentists are classed as...
Answer
  • General public
  • Non-classified workers
  • Classified workers

Question 30

Question
Effective dose considers the radiosensitivity of body organs as well as the type of radiation the patient is exposed to.
Answer
  • True
  • False

Question 31

Question
Equivalent dose considers the radiosensitivity of body organs as well as the type of radiation the patient is exposed to.
Answer
  • True
  • False

Question 32

Question
Effective dose = Absorbed dose x Radiation weighting factor
Answer
  • True
  • False

Question 33

Question
Equivalent dose = Absorbed dose x Radiation weighting factor
Answer
  • True
  • False

Question 34

Question
Absorbed dose is...
Answer
  • The amount of energy absorbed from the X-ray beam
  • The ability of radiation to ionise air
  • The amount of energy absorbed from the X-ray beam as well as considering the type of radiation involved
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