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Dental Radiography > DENT 1050 Chapter 8 > Flashcards

DENT 1050 Chapter 8 Flashcards

1
Q

The portion of a processed radiograph that appears dark or black is termed:

a. dense
b. radiolucent
c. radiopaque
d. transparent

A

b. radiolucent

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2
Q

The portion of a processed radiograph that appears light or white is termed:

a. radiolucent
b. radiopaque
c. dense
d. high density

A

b. radiopaque

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3
Q

Which of the following appears most radiolucent on a dental radiograph?

a. bone
b. enamel
c. dentin
d. air space

A

d. air space

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4
Q

An example of a radiopaque structure seen on dental x-rays is:

a. bone
b. enamel
c. dentin
d. all of the above

A

d. all of the above

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5
Q

The overall blackness or darkness of a dental radiograph is termed:

a. density
b. contrast
c. subject thickness
d. diagnostic quality

A

a. density

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6
Q

Increasing the milliamperage (mA) will cause:

a. an increase in density; the image appears darker
b. an increase in density; the image appears lighter
c. a decrease in density; the image appears darker
d. a decrease in density; the image appears lighter

A

a. an increase in density; the image appears darker

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7
Q

Increasing the operating kilovoltage peak (kVp) will cause:

a. an increase in density; the image appears darker
b. an increase in density; the image appears lighter
c. a decrease in density; the image appears darker
d. a decrease in density; the image appears lighter

A

a. an increase in density; the image appears darker

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8
Q

Increasing the exposure time will cause:

a. an increase in density; the image appears darker
b. an increase in density; the image appears lighter
c. a decrease in density; the image appears darker
d. a decrease in density; the image appears lighter

A

a. an increase in density; the image appears darker

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9
Q

A dental patient has thick soft tissues and dense bones. To compensate for this increase in subject thickness and to provide an image of diagnostic density, the dental radiographer may:

a. increase the exposure time
b. increase the milliamperage
c. increase the operating kilovoltage peak
d. any of the above

A

d. any of the above

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10
Q

The difference in the degrees of blackness between adjacent areas on a dental radiograph is termed:

a. density
b. contrast
c. subject thickness
d. diagnostic quality

A

b. contrast

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11
Q

When viewed on a light source, a dental radiograph that demonstrates many shades of gray is said to have:

a. high contrast
b. low contrast
c. high density
d. low density

A

b. low contrast

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12
Q

When viewed on a light source, a dental radiograph that demonstrates very dark areas and very light areas is said to have:

a. high contrast
b. low contrast
c. high density
d. low density

A

a. high contrast

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13
Q

In figure 8-16, which diagram exhibits high contrast?

a. A
b. B
c. C

A

b. B (one black, one gray, one large white)

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14
Q

In figure 8-16, which diagram exhibits low contrast?

a. A
b. B
c. C

A

a. A (many shades of gray)

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15
Q

In figure 8-16, which diagram exhibits long-scale contrast?

a. A
b. B
c. C

A

a. A (many shades of gray)

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16
Q

In figure 8-16, which diagram exhibits short-scale contrast?

a. A
b. B
c. C

A

b. B (one black, one gray, one large white)

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17
Q

In figure 8-16, which diagram exhibits no contrast?

a. A
b. B
c. C

A

c. C (completely gray)

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18
Q

The one exposure factor that has a direct influence on the contrast of a dental radiograph is:

a. operating kilovoltage peak
b. milliamperage
c. exposure time
d. subject thickness

A

a. operating kilovoltage peak

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19
Q

The type of contrast preferred in dental radiography is:

a. low contrast
b. long-scale contrast only
c. short-scale contrast only
d. a compromise between short-scale contrast and long-scale contrast

A

d. a compromise between short-scale contrast and long-scale contrast

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20
Q

The stepwedge is used for all of the following EXCEPT:

a. to demonstrate short-scale and long-scale contrast
b. to monitor quality control of film processing
c. to increase the penetrating quality of the x-ray beam
d. to demonstrate densities

A

c. to increase the penetrating quality of the x-ray beam

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21
Q

The capability of the receptor to reproduce distinct outlines of an object is termed:

a. sharpness
b. magnification
c. distortion
d. diagnostic quality

A

a. sharpness

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22
Q

The unsharpness or blurred edges seen on a radiographic image is termed:

a. distortion
b. umbra
c. penumbra
d. contrast

A

c. penumbra

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23
Q

The geometric characteristic that refers to a radiographic image that appears larger than its actual size is termed:

a. distortion
b. detail
c. definition
d. magnification

A

d. magnification

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24
Q

A variation in the true size and shape of the object being radiographed is termed:

a. magnification
b. distortion
c. sharpness
d. resolution

A

b. distortion

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25
Q

Fill in the blank:

Decrease focal spot size = _______ sharpness

A

Increase

26
Q

Fill in the blank:

Increase crystal size = _______ sharpness

A

decrease

27
Q

Fill in the blank:

Decrease crystal size = _______ sharpness

A

increase

28
Q

Fill in the blank:

Decrease movement = _______ sharpness

A

increase

29
Q

Fill in the blank:

Increase movement = _______ sharpness

A

decrease

30
Q

Fill in the blank:

Increase target-receptor distance = _______ magnification

A

decrease

31
Q

Fill in the blank:

Increase object-receptor distance = _______ magnification

A

increase

32
Q

Fill in the blank:

Decrease object-receptor distance = _______ magnification

A

decrease

33
Q

Fill in the blank:

Object and receptor are parallel = _______ distortion

A

decrease

34
Q

Fill in the blank:

Beam perpendicular to object and receptor = _______ distortion

A

decrease

35
Q

Fill in the blank:

Beam not perpendicular to object and receptor = _______ distortion

A

increase

36
Q

Contrast

A

define

37
Q

Contrast, high

A

define

38
Q

Contrast, long-scale

A

define

39
Q

Contrast, low

A

define

40
Q

Contrast, film

A

define

41
Q

Contrast, scale of

A

define

42
Q

Contrast, short scale

A

define

43
Q

Contrast, subject

A

define

44
Q

Density

A

define

45
Q

Distance, object-receptor

A

define

46
Q

Distance, target-receptor

A

define

47
Q

Distortion

A

define

48
Q

Exposure factors

A

define

49
Q

Exposure time

A

define

50
Q

Focal spot

A

define

51
Q

Magnification

A

define

52
Q

Milliamperage

A

define

53
Q

Operating kilovoltage peak

A

define

54
Q

Penumbra

A

define

55
Q

Radiograph, diagnostic

A

define

56
Q

Radiolucent

A

define

57
Q

Radiopaque

A

define

58
Q

Sharpness

A

define

59
Q

Stepwedge

A

define

60
Q

Subject thickness

A

define

Dental Radiography (14 decks)

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