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Rad 3 Testout > Rad > Flashcards

Rad Flashcards

1
Q

Digital images are a numeric representation of the x-ray intensities that are transmitted through the patient?

A

T

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2
Q

Digital imaging systems have a narrow dynamic range?

A

F

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3
Q

Digital processing involve the systematic application of highly complex mathematical formulas called?

A

Algorithms

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4
Q

The range or level of image contrast in the digital image is primarily controlled by?

A

Digital processing

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5
Q

Exposure latitude with the digital imaging is more wider or narrow when compared with analog imaging?

A

Wider

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6
Q

List the six image quality factors to you evaluate digital image

A

Brightness, distortion, contrast, exposure indicator, spatial resolution, noise,.

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7
Q

Individual Imogene the term what replaces density as applied in analog film based imaging?

A

Brightness

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8
Q

Changes in MAs do not have a primary controlling effect on digital image brightness?

A

True

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9
Q

Brightness cannot be altered in the digital image once it has been processed?

A

F

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10
Q

A digital imaging systems ability to distinguish between similar tissues is termed

A

Contrast resolution

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11
Q

Radiographic contrast in the digital image is primarily affected by

A

Application of processing algorithms

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12
Q

The greater the bit death of a digital imaging system the greater the

A

Contrast resolution

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13
Q

List the term describing the two pixel size is used in digital imaging

A

Acquisition pixel size and display pixel size

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14
Q

Which one of the two pixel sizes is most critical in maintaining high-resolution digital imaging

A

Acquisition pixel

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15
Q

Focal spot size has no impact on the resolution of the digital image

A

False

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16
Q

The current range of spatial resolution for digital radiographic imaging systems is between

A

2.5 LP/millimeters 5.0 lp/millimeters

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17
Q

In addition to acquisition pixel size spatial resolution in the digital image is controlled by?

A

Display matrix

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18
Q

The factors that affect image distortion for the digital image are different from those that affect filmscreen systems?

A

F

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19
Q

A numeric value that is representative of the exposure the digital image receptor receives is termed the?

A

Exposure indicator

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20
Q

List The four factors that affect the exposure indicator in the digital image?

A

MAs, KV, total detector area irradiated, objects exposed.

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21
Q

If the recommended exposure indicator range for I will expose images between 150 and 250, a value of 350 would indicate what?

A

Under exposure

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22
Q

If the recommended exposure indicator ranges between 2.0 and 2.4, then a value of 1.2 indicates?

A

Under exposure

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23
Q

Very find the exposure indicator for each exposure is essential in producing quality digital images with the?

A

Least possible dose to patient

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24
Q

A random disturbance that obscures or reduces clarity is the definition of?

A

Noise

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25
Q

SNR is the acronym for?

A

Signal to noise ratio

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26
Q

When insufficient MAs is applied in the production of a digital image it produces a what?

A

Low image

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27
Q

Another term for image noise is

A

Mottle

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28
Q

Changing or enhancing the electronic image to improve its diagnostic quality is called?

A

Post processing

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29
Q

Identify the top of postprocessing described by listing the correct term for the following definition. Adding text to images means?

A

Annotation

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30
Q

Increasing brightness along the margins of structures to increase the visibility of the edges?

A

Edge enhancement

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31
Q

Reversing the dark and light pixel values of an image is

A

Image Reversal

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32
Q

Enlarging all or part of an image is

A

Magnification

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33
Q

The application of specific image processing to reduce the display of noise in an image

A

Smoothing

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34
Q

Removing background anatomy to allow visualization of contrast media field structures?

A

Subjection

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35
Q

List the three components of a Photos stimulable storage phosphor plate system (PSP-CR)?

A

Image plates, IP reader, technologist or workstation.

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36
Q

A PSP based digital imaging system may be cassette based or cassette less?

A

True

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37
Q

The term describing the image being transmitted to digital archive for viewing in reading by the referring physician or radiologist is?

A

Image archiving

38
Q

When using a PSP image plate, patient data can be linked to the image by use of AN?

A

Barcode reader

39
Q

What’s the PSP image plate has had an image recorded on it, it must be discarded?

A

F

40
Q

The Latent image on a PSP image plate is read by a lazer within the CR reader?

A

T

41
Q

The greater the exposure to the plate, the greater the intensity of the light emitted from the plate during the reading process?

A

T

42
Q

Any residue latent image is he erased on the PSP image plate by applying?

A

Bright light

43
Q

The process of transferring the digital image to a storage device is what?

A

Archiving

44
Q

Which one of the following technical factors does not apply to digital imaging?

A

A minimum of 72 inches is required for all projections

45
Q

50% of the IP must be exposed to produce a correct reading of the image?

A

F

46
Q

The use of grades is optional with PSP because the IP is not as sensitive to a scatter radiation as analog radiography

A

F

47
Q

Which of the following Imogene component is not required with direct digital radiography?

A

IP and Image Reader

48
Q

Patient those may be lower with if FPD- TFT as compared with analog radiography?

A

T

49
Q

When using FPD-TFT for most non-grid procedures one reason the grid is generally not removed is it’s fragile construction?

A

F

50
Q

FPD-TFT and PS P-based systems does not provide the ability to view a previous image to evaluate for positioning errors and confirm the exposure indicator?

A

F

51
Q

In addition to FPD-TFT and PS PBase systems a third type of system is used to acquire radiographic images digitally which is?

A

CCD based systems

52
Q

24 x 30 cm is?

A

10 x 12”

53
Q

18 x 24 cm is?

A

8 x 10”

54
Q

35 x 43 cm?

A

14 x 17”

55
Q

30 x 35 cm?

A

11 x 14”

56
Q

24 x 24 cm?

A

9 x 9”

57
Q

18 x 43 cm?

A

7 x 17”

58
Q

The size of the image receptor used is dependent primarily on the size of the body part examined?

A

T

59
Q

Define the acronym PACS?

A

Picture archiving communication system

60
Q

DICOM?

A

Digital imaging and communication in medicine

61
Q

RIS?

A

Radiology info system

62
Q

HIS?

A

Hospital info system

63
Q

HL7?

A

Health level 7

64
Q

The electronic transmission of diagnostic imaging studies is termed?

A

Teleradiography

65
Q

What receptor is made with amorphis selenium or amorphis silicon?

A

FPD-TFT

66
Q

Series of boxes that gives form to the image?

A

Display matrix

67
Q

Range of exposure intensities that produce an acceptable image?

A

Exposure latitude

68
Q

The user adjusting the window level and window width?

A

Windowing

69
Q

Unsharp edges of the projected image?

A

Penumbra

70
Q

Numeric value that is representative of the exposure the image receptor received in digital radiography?

A

Exposure indicator

71
Q

Representative of the number of shades of gray that can be demonstrated by each pixel?

A

Bit depth

72
Q

Misrepresentation of objects size or shape as projected onto radiographic recording media?

A

Distortion

73
Q

Controls the energy of the x-ray beam?

A

KV

74
Q

Random disturbance that obscures or reduces clarity?

A

Noise

75
Q

The recorded sharpness of structures on the image?

A

Spatial resolution

76
Q

Changing or enhancing the electronic image to view it from a different perspective or improve its diagnostic quality?

A

Post processing

77
Q

RIS?

A

Radiology info system

78
Q

IR?

A

Image receptor

79
Q

OID?

A

Object image receptor distance

80
Q

DR?

A

Digital radiography

81
Q

AEC?

A

Automatic exposure control

82
Q

HIS?

A

Hospital info system

83
Q

Term used by certain equipment many factors to imply exposure indicators?

A

Exposure level

84
Q

Range of exposure intensities that will produce an acceptable image?

A

Exposure latitude

85
Q

Random disturbance that obscures or reduces slightly?

A

Noise

86
Q

The point of least distortion of the projected image?

A

Central Ray

87
Q

the user adjusting the window level and window width?

A

Windowing

88
Q

Series of boxes that give form to the image?

A

Display matrix

89
Q

Representative of the number of shades of gray that can be demonstrated by each pixel?

A

Bit-depth

90
Q

Digital imaging requires the images be chemically processed?

A

F

Rad 3 Testout (1 decks)

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