DENT 1050 Chapter 8 Flashcards Preview

Dental Radiography > DENT 1050 Chapter 8 > Flashcards

Flashcards in DENT 1050 Chapter 8 Deck (60):
1

The portion of a processed radiograph that appears dark or black is termed:
a. dense
b. radiolucent
c. radiopaque
d. transparent

b. radiolucent

2

The portion of a processed radiograph that appears light or white is termed:
a. radiolucent
b. radiopaque
c. dense
d. high density

b. radiopaque

3

Which of the following appears most radiolucent on a dental radiograph?
a. bone
b. enamel
c. dentin
d. air space

d. air space

4

An example of a radiopaque structure seen on dental x-rays is:
a. bone
b. enamel
c. dentin
d. all of the above

d. all of the above

5

The overall blackness or darkness of a dental radiograph is termed:
a. density
b. contrast
c. subject thickness
d. diagnostic quality

a. density

6

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. an increase in density; the image appears darker

7

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. an increase in density; the image appears darker

8

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. an increase in density; the image appears darker

9

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

d. any of the above

10

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

b. contrast

11

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

b. low contrast

12

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. high contrast

13

In figure 8-16, which diagram exhibits high contrast?
a. A
b. B
c. C

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

14

In figure 8-16, which diagram exhibits low contrast?
a. A
b. B
c. C

a. A (many shades of gray)

15

In figure 8-16, which diagram exhibits long-scale contrast?
a. A
b. B
c. C

a. A (many shades of gray)

16

In figure 8-16, which diagram exhibits short-scale contrast?
a. A
b. B
c. C

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

17

In figure 8-16, which diagram exhibits no contrast?
a. A
b. B
c. C

c. C (completely gray)

18

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. operating kilovoltage peak

19

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

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

20

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

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

21

The capability of the receptor to reproduce distinct outlines of an object is termed:
a. sharpness
b. magnification
c. distortion
d. diagnostic quality

a. sharpness

22

The unsharpness or blurred edges seen on a radiographic image is termed:
a. distortion
b. umbra
c. penumbra
d. contrast

c. penumbra

23

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

d. magnification

24

A variation in the true size and shape of the object being radiographed is termed:
a. magnification
b. distortion
c. sharpness
d. resolution

b. distortion

25

Fill in the blank:
Decrease focal spot size = _______ sharpness

Increase

26

Fill in the blank:
Increase crystal size = _______ sharpness

decrease

27

Fill in the blank:
Decrease crystal size = _______ sharpness

increase

28

Fill in the blank:
Decrease movement = _______ sharpness

increase

29

Fill in the blank:
Increase movement = _______ sharpness

decrease

30

Fill in the blank:
Increase target-receptor distance = _______ magnification

decrease

31

Fill in the blank:
Increase object-receptor distance = _______ magnification

increase

32

Fill in the blank:
Decrease object-receptor distance = _______ magnification

decrease

33

Fill in the blank:
Object and receptor are parallel = _______ distortion

decrease

34

Fill in the blank:
Beam perpendicular to object and receptor = _______ distortion

decrease

35

Fill in the blank:
Beam not perpendicular to object and receptor = _______ distortion

increase

36

Contrast

define

37

Contrast, high

define

38

Contrast, long-scale

define

39

Contrast, low

define

40

Contrast, film

define

41

Contrast, scale of

define

42

Contrast, short scale

define

43

Contrast, subject

define

44

Density

define

45

Distance, object-receptor

define

46

Distance, target-receptor

define

47

Distortion

define

48

Exposure factors

define

49

Exposure time

define

50

Focal spot

define

51

Magnification

define

52

Milliamperage

define

53

Operating kilovoltage peak

define

54

Penumbra

define

55

Radiograph, diagnostic

define

56

Radiolucent

define

57

Radiopaque

define

58

Sharpness

define

59

Stepwedge

define

60

Subject thickness

define