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RADR 2309 Ch. 9 Interactions with Matter

Total questions: 47

Worksheet time: 24mins

Name
Class
Date
1.

The total reduction in the number of x-rays remaining in an x-ray beam after penetration through a given thickness of tissue.

a)

Backscatter radiation

b)

Coherent scatter

c)

Compton scatter

d)

Attenuation

2.

X-rays that are scattered back in the direction of the incident x-ray beam.

a)

Backscatter radiation

b)

Coherent scatter

c)

Compton scatter

d)

Attenuation

3.

Low energy x-ray, < 10KeV that interact with an atom.

a)

Backscatter radiation

b)

Coherent scatter

c)

Compton scatter

d)

Attenuation

4.

Moderate energy x-rays that interact with outer-shell electrons

a)

Backscatter radiation

b)

Coherent scatter

c)

Compton scatter

d)

Attenuation

5.

When Air and Barium are used together as agents.

a)

Double-Contrast

b)

Contrast Media

c)

Mass Density

d)

Photodisintegration

6.

In a double-contrast air would be a ______ contrast agent.

a)

Negative

b)

Positive

c)

Increased

d)

Decreased

7.

An x-ray image resulting from the difference between x-rays that are absorbed by the body (photoelectric) and those that are transmitted through the patient without interaction and Compton Scatter.

a)

Differential Absorption

b)

Compton Scatter

c)

Coherent Scatter

d)

Photoelectric Effect

8.

When incident x-ray interacts with an inner K-Shell electron.

a)

Differential Absorption

b)

Compton Scatter

c)

Coherent Scatter

d)

Photoelectric Effect

9.

Photon of 10 MeV or greater interacts with the tissue atom

a)

Differential Absorption

b)

Compton Scatter

c)

Photodisintegration

d)

Photoelectric Effect

10.

When the beam exiting from tissue and hitting the x-ray film emulsion.

a)

Differential Absorption

b)

Remnant Radiation

c)

Photodisintegration

d)

Photoelectric Effect

11.

Specific ____ and ____ are required to image certain tissue and if chosen correctly, it will decrease pt exposure.

a)

mAs

b)

kVp

c)

Shielding

d)

Collimation

12.

In Coherent Scatter, incident Photons _____ NO energy but changes _________.

a)

Loses; direction

b)

Loses; energy

c)

Increase; drection

d)

Increase; outer-shell

13.

Coherent scatter is not important because it deals with low energy x-rays which does nothing for diagnostic imaging and shows up as film fog.

a)

True

b)

False

14.

At 70 kVp, 3% of x-rays undergo Coherent Scattering.

a)

True

b)

False

15.

In Coherent Scatter, the wavelength of an incident photon is ____ wavelength to the scatter photon.

a)

Equal

b)

Inverse

c)

Inversely Proportional

d)

Lower

16.

In Coherent Scatter, the wavelength of an _______ ______ is equal wavelength to the _______ ______.

a)

incident photon; scatter photon

b)

sine wave; positron

c)

electron; neutron

d)

neutron; electron

17.

When do moderate energy x-rays interact with outer-shell electrons?

a)

Compton Scatter

b)

Coherent Scatter

c)

Photoelectric Effect

d)

Pair Production

18.

In Compton Scatter, incident photons _____ outer-shell electrons.

a)

Eject

b)

Replace

c)

Pass through

d)

Entangle with

19.

The electron ejected during Compton interaction is referred to as? Choose 2

a)

Compton Electron

b)

Secondary Electron

c)

Backscatter Electron

d)

Scatter Electron

20.

Compton Electron may have enough energy to undergo more ionizing interactions.

a)

True

b)

False

21.

In Compton Scatter, scattered x-ray will eventually _________.

a)

Disappear

b)

Be abosrbed

c)

Increase in Kinetic Energy

d)

Decrease in Kinetic Energy

22.

Compton Scatter can be deflected in a single direction.

a)

True

b)

False

23.

As the angle of deflection increase to 180 Degrees, _____ energy is transferred to the Compton Electron

a)

Less

b)

More

c)

Double

d)

Half

24.

As kVp Increases > Probability of Compton Interaction _________.

a)

Increases

b)

Decreases

c)

Stays the same

d)

Cut in half

25.

As Photon Energy _______the % of Compton Interactions ________relative to Photon Energy interactions, but the total interactions will decrease.

a)

Increases; increases

b)

increases; decreases

c)

decreases; decreases

d)

decreases; increases

26.

Compton Scatter provides some useful information on the radiograph

a)

False

b)

True

27.

Compton Scatter creates a uniform optical density known as fog which results in reduced Image ______.

a)

Density

b)

Contrast

c)

Resolution

d)

Quantity

28.

This diagram depicts what?

a)

Coherent Scatter

b)

Compton Scatter

c)

Photoelectric Effect

d)

Photodisintegration

29.

What describes when a incident photon is absorbed and Photoelectron is ejected from an atom.

a)

Photoelectric Effect

b)

Coherent Scatter

c)

Compton Scatter

d)

Pair Production

30.

When a incident photon is absorbed and Photoelectron is ejected from an atom that results in the production of _________ Radiation

a)

Bremsstrahlung

b)

Characteristic

c)

x-rad

d)

Scatter

31.

Secondary Radiation from Photoelectric effect contributes nothing of diagnostic value to the image and behaves as Compton Scatter.

a)

True

b)

False

32.

Probability of a Photoelectric Effect is a function of x-ray energy and the _______ of matter

a)

Atomic number

b)

Difference of binding energies

c)

Atomic mass

d)

Speed of light

33.

Incident x-ray MUST have less than or equal energy than the Binding Energy of electrons

a)

True

b)

False

34.

Photoelectric effect results in ________ Radiation.

a)

Primary

b)

Secondary

c)

Character

d)

Bremsberg

35.

Photoelectric effect results in a Photoelectron with kinetic energy.

a)

True

b)

False

36.

Photoelectric Effect results in Ionized tissue with an increase in __________.

a)

Compton scatter

b)

pt dose

c)

Line Focus Principle

d)

Voltage Ripple

37.

Increased Radiographic _______ on film is a result in Photoelectric Effect.

a)

Contrast

b)

Density

c)

Heat

d)

Useful Beam

38.

What does this diagram depict?

a)

Photoelectric Effect

b)

Compton Scatter

c)

Photodisintegration

d)

Coherent Scatter

39.

What describes when a Photon of 10 MeV or greater interacts with the tissue atom?

a)

Photoelectric Effect

b)

Compton Scatter

c)

Photodisintegration

d)

Coherent Scatter

40.

When interaction occurs at the nucleus with Photon absorbed describes which x-ray interaction with matter?

a)

Photoelectric Effect

b)

Compton Scatter

c)

Photodisintegration

d)

Coherent Scatter

41.

When the nucleus is excited and emits a nucleon or other nuclear fragment describes which x-ray interaction?

a)

Photoelectric Effect

b)

Compton Scatter

c)

Photodisintegration

d)

Coherent Scatter

42.

Photodisintegration occurs at energies of 10 MeV or above and it IS a factor in Diagnostic Radiography

a)

True

b)

False

43.

What does this diagram depict?

a)

Photoelectric Effect

b)

Compton Scatter

c)

Photodisintegration

d)

Coherent Scatter

44.

An x-ray image resulting from the difference between x-rays that are absorbed by the body (photoelectric) and those that are transmitted through the patient without interaction and Compton Scatter, describes what?

a)

Photodisintegration

b)

Pair Production

c)

Photoelectric Effect

d)

Differential Absorption

45.

Total reduction in the number of x-rays remaining in an x-ray beam after penetration through a given thickness of tissue, describes what?

a)

Attenuation

b)

Differential Absorption

c)

Photoelectric Effect

d)

Coherent scatter

46.

When a photon of 1.02 MeV or higher interact with the tissue atom

a)

Disintegration

b)

Pair Production

c)

Coherent Scatter

d)

Differential Absorption

47.

When 2 Electrons appear - 1 positron and 1 electron occurs during which x-ray interaction with matter?

a)

Pair Production

b)

Photoelectric Effect

c)

Photodisintegration

d)

Coherent Scatter