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ROENT > 13. B (FILM IMAGE) > Flashcards

13. B (FILM IMAGE) Flashcards

1
Q

True or false

all films, even after processing, do not look the same

A

True

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2
Q

radiographic assessment is _____; hence, a common
understanding of it is needed

A

subjective

(FILM IMAGE)

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3
Q

an ideal radiograph has the ff.:

A
  1. represents the area radiographed
  2. devoid of technical errors
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4
Q

in ______ radiographs, there is found the colors black and white and varying shades of gray

A

periapical

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5
Q

radiolucent

A. Black
B. White
C. Gray

A

A

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6
Q

produced due to lack of density of an object,
permeating the passage of x-ray beams without
any attenuation

A. Black
B. White
C. Gray

A

A

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7
Q

ex.: air spaces or soft tissues such as gingiva

A. Black
B. White
C. Gray

A

A

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8
Q

radiopaque

A. Black
B. White
C. Gray

A

B

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9
Q

produced by dense structures that absorb or
resist the passage of x-ray beams

A. Black
B. White
C. Gray

A

B

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10
Q

ex.: enamel, dentin, bone

A. Black
B. White
C. Gray

A

B

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11
Q

areas where the x-rays have stopped to a varying degree

A. Black
B. White
C. Gray

A

C

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12
Q

True or false

radiolucent or radiopaque does not mean totally black or totally white; both have range

A

T

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13
Q

dark gray to black

A

Radiolucent

(range)

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14
Q

light gray to white

A

Radiopaque

(range)

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15
Q

True or false

black, white, or gray images will depend on the thickness/density or material of the structure;
different materials = different radiographic images

A

T

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16
Q

True or false

when radioactive exposure happens, some x-ray beams pass right through towards the film, while some will not because of dense/hard tissues and their dense structure

A

T

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17
Q

enamel, dentin, cementum

A. Dense/Hard Tissues
B. Hollow/Soft Tissues

A

A

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18
Q

gingiva, air spaces, sinus

A. Dense/Hard Tissues
B. Hollow/Soft Tissues

A

B

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19
Q

FILM IMAGE visual characteristics are?

A

o density
o contrast

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20
Q

FILM IMAGE geometric characteristics are?

A

o sharpness
o magnification
o distortion

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21
Q

refers to the overall darkening of the radiograph

A

DENSITY

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22
Q

usually depends on the degree of silver blackening in the
exposed or processed radiograph

A

DENSITY

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23
Q

if density is?

too dark or there is poor radiographic quality

A. Too High
B. Too Low

A

A

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24
Q

if density is?

too light; poor diagnostic quality as well

A. Too High
B. Too Low

A

B

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25
Q

DENSITY depends on?

A

o milliamperage
o kilovoltage peak
o exposure time
o density of the subject thickness
o developmental conditions

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26
Q

refers to the darkening of the whole radiograph image itself

A

DENSITY

27
Q

difference in contrasting radiodensities and the decrease of blackness in adjacent areas present in a dental radiograph

A

CONTRAST

28
Q

refers to the ______ densities between two or more adjacent
areas such as: enamel-dentin-cementum-bone

A

CONTRAST

29
Q

essential in the differentiation of structures

A

CONTRAST

30
Q

short contrast scale

A. Two Densities
B. Many Densities

A

A

31
Q

long contrast scale

A. Two Densities
B. Many Densities

A

B

32
Q

can be influenced by the film quality and processing

A

CONTRAST

33
Q

object influences the radiographic contrast

A

SUBJECT CONTRAST

34
Q

influenced by the thickness, density & composition of the subject

A

SUBJECT CONTRAST

35
Q

depends on the kilovoltage peak

A

RADIOGRAPHIC CONTRAST

36
Q

decreased contrast

A. Increased kvP
B. Decreased kvP

A

A

37
Q

increased contrast

A. Increased kvP
B. Decreased kvP

A

B

38
Q

CONTRAST is also influenced by:

A

o milliamperage
o exposure time
o processing conditions

39
Q

how well a boundary between 2 contrasting radiodensities is delineated

A

SHARPNESS

40
Q

fuzzy unclearness surrounding the radioactive image

A

PENUMBRA

41
Q

the sharpness/blurriness of the radiographic image depends on the focal spot:

A

PENUMBRA

42
Q

“pen”

A

almost

43
Q

“umbra”

A

shadow

44
Q

large shadow

A. Large Focal Spot
B. Small Focal Spot

A

A

45
Q

less shadow

A. Large Focal Spot
B. Small Focal Spot

A

B

46
Q

better, giving a sharper image

A. Large Focal Spot
B. Small Focal Spot

A

B

47
Q

______ also depends on the film composition and the size of the silver halide crystals

A

sharpness

48
Q

the emulsion of faster film are large silver halide crystals
that produce less image ____

A

sharpness

49
Q

smaller silver bromide crystals produce a sharper image

A

sharpness

50
Q

another factor is movement which causes loss of image sharpness; could be due to ____[3]

A

cone, patient or receptor

51
Q

____ problems could include: loose areas, hinges, or screws

A

cone

52
Q

radiographic image that appears larger than the actual size of the object radiographed

A

MAGNIFICATION

53
Q

ex.: the tooth length of tooth 11 is 19-25 mm; when the radiograph reaches 30 mm or larger, the cone/film must be repositioned to adjust the ____

A

MAGNIFICATION

54
Q

factors that influence magnification:

A

o source-object distance
o object-film distance
o large effective focal spot

55
Q

T or f

increasing the target-object distance will decrease magnification

A

T

56
Q

ex.: using a 16-inch cone produces an image almost the same length as the actual object, while using an 8-inch cone will produce a larger radiographic image

A

MAGNIFICATION

57
Q

T or f

Increasing object-film distance will decrease magnification

A

F

(DECREASING object-film distance will decrease magnification)

58
Q

a variation in the size and shape of the object being radiographed

A

DISTORTION

59
Q

caused by improper object-film alignment

A

DISTORTION

60
Q

film must be parallel to the tooth and perpendicular to the
x-ray beam (depending on the technique)

A

DISTORTION

61
Q

this makes the tooth appear larger or fatter (when toward you) or thinner
(away from you)

A

DISTORTION

62
Q

x-ray tube with a wrong vertical angulation will elongate or
shorten the tooth

A

DISTORTION

63
Q

FACTORS THAT INFLUENCE A RADIOGRAPH’S DIAGNOSTIC QUALITY. [11]

A

→ milliamperage
→ kilovoltage peak
→ exposure time
→ density of the object
→ speed of the film
→ collimation
→ source-object distance
→ inverse square law
→ ideal technique and film processing conditions
→ good x-ray film quality
→ use of a small effective focal spot

64
Q

helps as a diagnosis tool

A

(FILM IMAGE)p

ROENT (13 decks)

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