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Radiology > Rad Tech Boot Camp Assessment > Flashcards

Rad Tech Boot Camp Assessment Flashcards

1
Q

Attenuation of the X-ray beam is defined as:

A

A reduction in X-ray beam intensity after passing through matter.

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2
Q

The part of the beam that exits the X-ray tube is called:

A

Primary Beam

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3
Q

Which of the following are by-products of a photoelectric interaction?

A

Electron only

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4
Q

Which of the following are by-products of a coherent scattering event?

A

Scattered photon only

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5
Q

The part of the beam that exits the patient is called:

A

Exit beam

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6
Q

A high kVp setting will result in ____ and ____.

A

Higher energy , less proportional attenuation

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7
Q

T/F Ionization occurs during a coherent scattering event.

A

False

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8
Q

Which of the following will produce the greatest amount of attenuation? (2 answers)

  1. Thicker part
  2. Thinner part
  3. Higher atomic number
  4. Lower atomic number
A

1&3

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9
Q

A low kVp setting will result in ____ and _____.

A

Lower energy greater proportional attenuation

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10
Q

T/F Ionization occurs during a Compton scattering event.

A

True

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11
Q

Another name for Coherent scatter is:

A

Another name for Coherent scatter is:

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12
Q

T/F Coherent scatter results from the ionization of an atom.

A

False

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13
Q

Within Coherent scatter, the incident photon’s energy is ___________ to the scattered photon.

A

Equal

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14
Q

Coherent scatter is most likely to occur when the incident X-ray photon has an energy level less than:

A

10 kev

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15
Q

An increase in coherent scatter would have this effect on spatial resolution

A

No effect

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16
Q

Which of the following are potential photon interactions in the matter?

  1. Characteristic Radiation
  2. Photoelectric Effect
  3. Compton Scattering
  4. Coherent Scattering
A

2,3,4

17
Q

Select all factors that are affected by Compton scattering:

  1. Image contrast
  2. Patient radiation dose
  3. Occupational exposure
A

1,2,3

18
Q

Compton scattering interaction with matter results in total absorption of the X-ray photon. T/F

A

False

19
Q

Compton scattering involves the interaction between an incident photon and an inner shell electron T/F

A

False

20
Q

An increase in Compton scatter has what effect on image contrast?

A

Decreased Image contrast

21
Q

A “small angle” Compton scatter photon would most likely strike the:

A

IR

22
Q

Select the type of Compton scattering direction with the highest total energy.

A

Forward Scattering

23
Q

Select all factors that have an effect on the production of Compton scatter:

  1. mAs
  2. kVp
  3. Body Habitus
A

2& 3

24
Q

With all factors being equal, what implementations can decrease the amount of Compton scattering on the radiographic image?

  1. Increased grid ratio
  2. Increased SID
  3. Increased OID
A

1 & 3

25
Q

What percent of the energy of the photon that enters the body is absorbed in a photoelectric interaction?

A

100%

26
Q

During a photoelectric interaction in the patient, when the X-ray photon interacts with an inner shell electron of an atom, what happens to that electron?

A

it is ejected from the atom

27
Q

Which of the following result from a photoelectric interaction in the body?

A. Absorption of the photon energy
B. Creation of a characteristic photon
C. Ejection of an electron that becomes a photoelectron

A

All of them

28
Q

With which of the following is photoelectric absorption most closely associated?

  1. production of scatter radiation
  2. increased patient dose
  3. damage to tissues and cells
A

2 &3

29
Q

Areas of the body that experience large numbers of photoelectric interactions are related to what type of radiographic appearance?

A

They will appear lighter/brighter on the image

30
Q

Which of the following anatomical structures will result in the least photoelectric absorption?

A

Lungs

31
Q

Which of the following is related to a decrease in the number of photoelectric interactions occurring during an X-ray exposure?

A

Increased Kilovoltage

32
Q

An increase in the number of photoelectric interactions occurring is associated with what type of image contrast?

A

Higher Contrast

33
Q

Which of the following projections would result in the greatest amount of photoelectric absorption of the X-ray beam?
PA chest
Lateral chest
Lateral lumbar spine

A

Lateral Lumbar spine

34
Q

Which of the following descriptions best describes the term “photoelectron”?

A

It is the electron that is ejected from the atom when it is struck by the photon

Radiology (13 decks)

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