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Imag II: Final "Mini Quiz Me"

Total questions: 77

Worksheet time: 39mins

Name
Class
Date
1.

The purpose of filtration is to:

a)

Increase patient dose

b)

Remove low-energy photons

c)

Increase image contrast

d)

Decrease HVL

2.

The Half-Value Layer (HVL) measures:

a)

Beam quantity

b)

Beam intensity at the anode

c)

Beam quality/penetration

d)

Scatter level in the room

3.

Adding filtration will:

a)

Decrease patient skin dose

b)

Increase the number of soft photons

c)

Increase beam intensity

d)

Decrease beam hardness

4.

Increasing HVL means the beam:

a)

Has lower penetration

b)

Contains more low-energy photons

c)

Is more penetrating

d)

Has reduced kVp

5.

Inherent filtration is found:

a)

Inside the tube housing

b)

Between the patient and IR

c)

Outside the collimator

d)

In the AEC detector

6.

Which is the primary material used for filtration?

a)

Lead

b)

Copper

c)

Aluminum

d)

Silver

7.

Added filtration is most commonly contributed by:

a)

Anode

b)

Window of tube

c)

Collimator mirror

d)

AEC ion chambers

8.

Beam hardening refers to:

a)

Increasing mAs

b)

Increasing the average photon energy

c)

Reducing tube cooling time

d)

Increasing scatter production

9.

As filtration increases, IR exposure:

a)

Increases

b)

Decreases

c)

Stays the same

d)

Doubles

10.

Low-energy photons should be removed because they:

a)

Improve contrast only

b)

Cause unnecessary patient dose

c)

Do not interact with tissue

d)

Always scatter away from patient

11.

AEC works by terminating exposure based on:

a)

Exposure time

b)

Amount of radiation reaching the detector

c)

mAs selected

d)

Detector temperature

12.

Mispositioning over the wrong AEC cell will result in:

a)

Perfect exposure

b)

Consistent density

c)

Overexposure or underexposure

d)

Increased contrast

13.

If the anatomy does not fully cover the AEC cell, the image will likely be:

a)

Too dark

b)

Too light

c)

Perfect

d)

Too magnified

14.

Collimating too tightly when using AEC may cause:

a)

Scatter increase

b)

Exposure termination too early

c)

Longer exposure times

d)

Saturation of the IR

15.

The backup time exists to:

a)

Increase patient dose

b)

Prevent overexposure

c)

Increase tube heating

d)

Reduce contrast

16.

Increasing mA when using AEC will:

a)

Increase exposure time

b)

Decrease exposure time

c)

Not affect exposure time

d)

Make the image darker

17.

The density (exposure) control on AEC adjusts:

a)

kVp

b)

Beam quality

c)

Exposure termination point

d)

Detector size

18.

Grids are used primarily to:

a)

Reduce patient dose

b)

Remove scatter before reaching the IR

c)

Increase beam intensity

d)

Reduce field size

19.

Scatter radiation primarily affects image:

a)

Contrast

b)

Sharpness

c)

Brightness

d)

Resolution

20.

Compton scatter is more likely to occur in:

a)

Bone

b)

Metal

c)

Soft tissue

d)

Air

21.

Decreasing field size will:

a)

Increase scatter

b)

Decrease scatter

c)

Increase patient dose

d)

Increase fog

22.

The most effective way to reduce scatter is:

a)

Increase SID

b)

Reduce OID

c)

Collimate tightly

d)

Increase kVp

23.

Beam restriction improves image:

a)

Density

b)

Contrast

c)

Distortion

d)

Magnification

24.

Off-level grid cutoff appears as:

a)

One side light

b)

Both sides light

c)

Overall underexposure

d)

Only the center exposed

25.

Off-center grid cutoff appears as:

a)

One-sided cutoff

b)

Complete loss of exposure

26.

Off-focus grid cutoff happens when:

a)

Wrong grid ratio is selected

b)

SID is outside focal range

c)

Tube is angled crosswise

d)

Detector is rotated

27.

Upside-down focused grid results in:

a)

Centered exposure only

b)

Severe cutoff on both edges

c)

Dark edges

d)

Increased density

28.

A grid should be used when the body part is thicker than:

a)

3 cm

b)

5 cm

c)

10 cm

d)

20 cm

29.

A higher grid ratio will:

a)

Decrease contrast

b)

Require more mAs

c)

Increase scatter reaching IR

d)

Reduce patient dose

30.

Air gap technique reduces scatter by:

a)

Increasing distance between patient and IR

b)

Increasing filtration

c)

Reducing OID

d)

Increasing kVp

31.

The interaction responsible for scatter is:

a)

Photoelectric absorption

b)

Bremsstrahlung

c)

Characteristic

32.

Photoelectric absorption increases:

a)

Fog

b)

Patient dose

c)

Scatter

d)

Focal spot size

33.

Increasing kVp will:

a)

Increase scatter

b)

Decrease scatter

c)

Increase grid ratio

d)

Reduce beam penetration

34.

The 15% rule states that increasing kVp by 15% will:

a)

Double IR exposure

b)

Halve IR exposure

c)

Reduce contrast

d)

Increase patient dose only

35.

mAs controls:

a)

Beam energy

b)

Beam quantity

c)

HVL

d)

Scatter production

36.

Increasing mAs will:

a)

Increase contrast

b)

Increase IR exposure

c)

Decrease patient dose

d)

Increase penetration

37.

When SID increases, IR exposure:

a)

Increases

b)

Decreases

c)

Doubles

38.

Bremsstrahlung photons are created when electrons:

a)

Knock out inner-shell electrons

b)

Slow down near the nucleus

c)

Combine with protons

d)

Produce scatter

39.

Characteristic photons occur when:

a)

Electrons change direction

b)

Outer-shell electrons fill inner-shell vacancies

c)

Electrons pass near the nucleus

d)

Electrons strike the filament

40.

Most x-ray photons produced at 70 kVp are:

a)

Photoelectric

b)

Characteristic

c)

Compton

d)

Bremsstrahlung

41.

Increasing SID will:

a)

Increase magnification

b)

Decrease magnification

c)

Increase scatter

d)

Increase contrast

42.

Decreasing OID will:

a)

Increase magnification

b)

Decrease magnification

c)

Increase scatter

d)

Reduce focal spot blur

43.

Increasing kVp affects photoelectric absorption by:

a)

Increasing PE

b)

Decreasing PE

c)

Not affecting PE

44.

Best way to reduce patient dose:

a)

Increase mAs

b)

Increase SID

c)

Use highest kVp appropriate

d)

Use large field size

45.

Increasing collimation (smaller field size) will:

a)

Increase scatter

b)

Reduce scatter

c)

Increase magnification

d)

Increase patient dose

46.

AEC minimum response time may cause:

a)

Overexposure

b)

Underexposure

c)

Motion blur

d)

Increased contrast

47.

When using AEC, which factor must still be selected manually?

a)

Exposure time

b)

mA

c)

Termination point

d)

Density setting

48.

If the patient is thinner than expected, AEC will:

a)

Overexpose the IR

b)

Underexpose the IR

c)

Produce perfect density

d)

Increase contrast

49.

If SID increases from 40" to 80", exposure will become:

a)

4x greater

b)

½ as intense

c)

¼ as intense

d)

Unchanged

50.

Original technique is 10 mAs at 40". What mAs is needed at 56"? Use exposure maintenance formula.

a)

8 mAs

b)

10 mAs

c)

16 mAs

d)

20 mAs

51.

If kVp is increased by 15%, mAs must be:

a)

Doubled to maintain density

b)

Halved to maintain density

c)

Reduced by 25%

d)

Increased by 30%

52.

If mA = 200 and time = 0.1 s, what is mAs?

a)

2

b)

10

c)

20

d)

200

53.

Doubling mAs will:

a)

Double IR exposure

b)

Half IR exposure

c)

Quadruple exposure

d)

Reduce scatter

54.

Increasing filtration will:

a)

Increase contrast

b)

Decrease patient skin dose

c)

Increase density

d)

Increase Compton scatter

55.

Total filtration includes:

a)

Only inherent

b)

Only added

c)

Inherent + added

d)

Compensating filters only

56.

Compensating filters are used to:

a)

Reduce scatter

b)

Even out tissue densities

c)

Increase contrast

d)

Increase beam penetration

57.

Wedge filters are useful for:

a)

Knee

b)

Skull

c)

AP foot

d)

Chest

58.

The primary benefit of beam restriction is:

a)

Increase kVp

b)

Reduce scatter

c)

Increase spatial resolution

d)

Increase mAs

59.

The collimator mirror adds:

a)

Inherent filtration

b)

Added filtration

c)

Compensating filtration

d)

Scatter filtration

60.

A light field that does NOT match the x-ray field violates:

a)

AEC

b)

SID

c)

Beam alignment

d)

HVL

61.

Off-level grid occurs when:

a)

SID is too short

b)

Tube is tilted

c)

Wrong grid ratio

d)

Patient is rotated

62.

Using a higher grid ratio requires:

a)

an increase in exposure

b)

a decrease in exposure

c)

no change in exposure

d)

lower patient dose

63.

Bremsstrahlung production depends on:

a)

Binding energy

b)

Distance to nucleus

c)

mAs only

d)

Electron capture

64.

Characteristic photons depend on:

a)

kVp above 69 keV

b)

Filament temperature

c)

Tube cooling

d)

OID

65.

The majority of beam interactions in tissue are:

a)

Pair production

b)

Compton scatter

c)

Photoelectric

d)

Coherent scatter

66.

Coherent scatter has:

a)

Major impact on image

b)

No energy transfer

c)

High patient dose

d)

High penetration

67.

Increasing collimation will:

a)

Increase fog

b)

Decrease fog

c)

Increase contrast loss

d)

Increase Compton scatter

68.

If the patient is too wide for the AEC cell, the result may be:

a)

More mAs

b)

Less mAs

c)

Higher SID

d)

Lower kVp

69.

What is the result of using too high mAs?

a)

Overexposure

b)

Underexposure

c)

Perfect exposure

d)

Increased contrast

70.

Backup timer is typically set at:

a)

50% of expected mAs

b)

100% of expected mAs

c)

150% of expected mAs

d)

200% of expected mAs

71.

A high kVp technique results in:

a)

More PE

b)

More Compton

c)

Less scatter

d)

Lower HVL

72.

The anode heel effect is more noticeable with:

a)

Short SID

b)

Large focal spot

c)

Small field size

d)

High filtration

73.

Increasing filtration affects the beam by:

a)

Decreasing quality

b)

Increasing quality

c)

Removing high-energy photons

d)

Increasing Compton scatter

74.

The purpose of collimator shutters is to:

a)

Reduce beam quality

b)

Reduce off-focus radiation

c)

Increase beam intensity

d)

Increase mAs

75.

74. HVL increases when:

a)

the energy of the X-ray beam increases

b)

the energy of the X-ray beam decreases

c)

the filtration is reduced

d)

the tube current is increased

76.

Which of the following occurs when the grid ratio increases?

a)

Tube warms

b)

Filtration increases

c)

mAs increases

d)

Grid ratio increases

77.

The most effective scatter cleanup device is:

a)

Aluminum filter

b)

Air gap

c)

Collimator

d)

High-ratio grid

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