X-ray Production And Interaction With Matter! Trivia Quiz
If you plan to be a lab technician you need to be conversant with X-ray production and interaction with matter. Throughout the week we have covered a lot when it comes to reading an X-ray result and some of the characteristics. The quiz below is specifically designed to see just how much you have understood so far. Do give it a shot!
- 1.The speed and energy of the electron stream as it passes across an x-ray tube is primarily controlled by the:
- A.
Applied kilovoltage
- B.
Vacuum material
- C.
Temperature
- D.
Focus cup voltage
- 2.To determine how fast an x-ray tube will dissipate heat after several exposures, which of the following should be used?
- A.
Anode cooling chart
- B.
Housing colling chart
- C.
Operator's manual
- D.
Radiographic rating chart
- 3.Which of the following charts permit the calculation of the time necessary for the housing to cool enough for additional exposures to be made?
- A.
Anode cooling charts
- B.
Housing colling charts
- C.
Radiographic rating charts
- D.
Tube rating charts
- 4.The energy lost as the X-ray tube electrons pass through and interact with the outer orbital shell electrons of the tungsten target is commonly associated with the production of:
- A.
High energy gamma rays
- B.
Low energy beta particles
- C.
Infrared radiation
- D.
High energy x-ray photons
- 5.The energy of the photons produced during the bremsstrahlung process is dependent upon the: 1. The energy of the projectile electrons. 2. The atomic number of the target material. 3. The distance between the electron and the nucleus.
- A.
1 only
- B.
2 only
- C.
3 only
- D.
1,2, and 3
- 6.The penetrability of an X-ray photon is affected by all of the following EXCEPT:
- A.
Frequency of the photon
- B.
Mass of the photon
- C.
Wavelength of the photon
- D.
Energy of the photon
- 7.Which of the following factors will have a significant effect on the energies produced during characteristics x-ray production process?
- A.
The atomic number of the material in the target of the xray tube
- B.
The type of gas used to fill the filament-anode-gap
- C.
The composition of the material used in the tube envelope
- D.
Temperature to which the filament is heated
- 8.All of the following factors are required for the production of x0rays EXCEPT:
- A.
A source of high velocity projectile electrons
- B.
A source of loosely bound (ionized) electrons
- C.
A target with a high atomic number
- D.
A strong magnetic field
- 9.The majority of X-rays produced in an X-ray tube are the result of:
- A.
A rapid deceleration of projectile electrons as they pass through the target material
- B.
A rapid deceleration of projectile neutrons as they pass through the target material
- C.
A rapid acceleration of projectile protons as they pass through the targer material
- D.
A rapid acceleration of projectile positrons as they pass through the target material
- 10.In the diagnostic energy region, approximately what percentage of electron stream energy is converted into x-rays?
- A.
.2% - 1%
- B.
7% - 15%
- C.
37% - 45%
- D.
86%- 99%
- 11.When a stream of fast-moving electrons interacts with the target of the anode, X-rays are generated by two different processes called:
- A.
Bremsstrahlung and characteristic radiation
- B.
Primary and secondary radiation
- C.
Leakage and scatter radiation
- D.
Compoton and photoelectric radiation
- 12.The maximum heat capacity of the anode of a radiographic tube is related to the: 1. diameter of the anode disk 2. design of the thermal envelope 3. The rotational speed of the anode disk
- A.
1 only
- B.
2 only
- C.
3 only
- D.
1, 2, and 3
- 13.Excessive heating of the tube may lead to vaporization of the filament or anode. Over a long period of time, this may result in any of the following EXCEPT:
- A.
Arcing within the tube
- B.
Filtration of the beam
- C.
The deterioration of the vacuum
- D.
An increase in the beam intensity
- 14.Surface irregularities on the face of the anode(pitting) are most often associated with a(an):
- A.
Excessive amount of filtering by the vacuum in the tube
- B.
Reduction in the radiation output during the exposure
- C.
Increased output of radiation due to the blooming of the focal spot
- D.
Reduction in the potential difference across the xray tube
- 15.At a potential of 70 kVp the projectile electrons will reach a speed of approximately half the speed of light
- A.
True
- B.
False
- 16.The maximum anode heat storage capacity of a radiographic tube is related to the type and size of the: 1. anode disk 2. thermal cushion 3. anode materials
- A.
1 only
- B.
2 only
- C.
3 only
- D.
1, 2, and 3
- 17.Which of the following portion of the induction motor of a rotating anode normally operates within the vacuum of the tube? 1. ball bearings 2. anode stem 3. rotor
- A.
1 only
- B.
2 only
- C.
3 only
- D.
1, 2, and 3
- 18.The main function of the pyrex glass that forms the protective envelope of the x-ray tube is: 1. containment of the electron stream near the filament 2. containment of the vacuum within the X-ray tube 3. production of the static electrical field around the filament
- A.
1 only
- B.
2 only
- C.
3 only
- D.
1, 2, and 3
- 19.The penetrability of an xray photon is effected by all of the following EXCEPT:
- A.
Frequency of the photon
- B.
Mass of the photon
- C.
Wavelength of the photon
- D.
Energy of the photon
- 20.Which of the following is likely to result in the appearance of an overload light? 1. the use of an excessive source-to0mage receptor distance 2. the use of a technique that exceeds the thermal capacity of the anode 3. the failure of the radiographer to push in the Bucky tray
- A.
1 only
- B.
2 only
- C.
3 only
- D.
1, 2, and 3
- 21.Which of the following is a byproduct of the photoelectric effect interaction 1. bremsstrahlung radiation 2. photoelectron 3. characteristic radiation
- A.
1 only
- B.
2 only
- C.
2 and 3 only
- D.
3 only
- E.
1, 2, and 3
- 22.Which of the following describes the radiation that makes up the X-ray beam after it has traversed the patient?
- A.
Exit or image formation (remnant) radiation
- B.
Primary radiation
- C.
Secondary radiation
- D.
Scatter radiation
- 23.The interaction between x-ray photons and tissue that is responsible for radiographic contrast, but that also contributes significantly to patient dose is:
- A.
Photoelectric effect
- B.
Compton scatter
- C.
Coherent scatter
- D.
Pair production
- 24.The photoelectric effect is more likely to occur with: 1. absorbers having a high Z number 2. absorbers having a high mass density 3. positive contrast media
- A.
1 and 2 only
- B.
1 and 3 only
- C.
2 and 3 only
- D.
1, 2, and 3
- 25.What is the term used to describe x-ray photon interaction with matter and the transference of a part of the photon's energy to matter?
- A.
Absorption
- B.
Scattering
- C.
Attenuation
- D.
Divergence
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