Rad Tech Boot Camp Assessment

Question 1

Attenuation of the X-ray beam is defined as:

Answer 1

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

Question 2

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

Answer 2

Primary Beam

Question 3

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

Answer 3

Electron only

Question 4

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

Answer 4

Scattered photon only

Question 5

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

Answer 5

Exit beam

Question 6

A high kVp setting will result in ____ and ____.

Answer 6

Higher energy , less proportional attenuation

Question 7

T/F Ionization occurs during a coherent scattering event.

Answer 7

False

Question 8

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

Answer 8

1&3

Question 9

A low kVp setting will result in ____ and _____.

Answer 9

Lower energy greater proportional attenuation

Question 10

T/F Ionization occurs during a Compton scattering event.

Answer 10

True

Question 11

Another name for Coherent scatter is:

Answer 11

Another name for Coherent scatter is:

Question 12

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

Answer 12

False

Question 13

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

Answer 13

Equal

Question 14

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

Answer 14

10 kev

Question 15

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

Answer 15

No effect

Question 16

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

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

Answer 16

2,3,4

Question 17

Select all factors that are affected by Compton scattering:

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

Answer 17

1,2,3

Question 18

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

Answer 18

False

Question 19

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

Answer 19

False

Question 20

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

Answer 20

Decreased Image contrast

Question 21

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

Answer 21

IR

Question 22

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

Answer 22

Forward Scattering

Question 23

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

1. mAs
2. kVp
3. Body Habitus

Answer 23

2& 3

Question 24

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

Answer 24

1 & 3

Question 25

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

Answer 25

100%

Question 26

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?

Answer 26

it is ejected from the atom

Question 27

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

Answer 27

All of them

Question 28

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

Answer 28

2 &3

Question 29

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

Answer 29

They will appear lighter/brighter on the image

Question 30

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

Answer 30

Lungs

Question 31

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

Answer 31

Increased Kilovoltage

Question 32

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

Answer 32

Higher Contrast

Question 33

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

Answer 33

Lateral Lumbar spine

Question 34

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

Answer 34

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