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Rad Technique > Overview > Flashcards

Overview Flashcards

0
Q

Image on the radiograph is a result of xray that

A

Pass through matter
Absorb
Scattered

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1
Q

Chances to interact

A

Probability function

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2
Q

Result of xray photons that interact with the film

A

Black areas

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3
Q

Areas that receive no exposure

A

White areas

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4
Q

Caused by partial exposure from xray

A

Grays tones

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5
Q

Uses film and intensifying screen in image formation

A

Film-Screen Imaging

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6
Q

Enhance the quality of xray

A

Intensifying screen

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7
Q

Film used a _______ for interpretation

A

Negathoscope

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8
Q

Properties of radiographic image (film screen imaging)

A

Density
Contrast
Detail
Distortion

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9
Q

Amount of blackening / amount of exposure

A

Density

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10
Q

Difference in density

A

Contrast

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11
Q

How well one can see small structures on the radiograph / sharpness

A

Detail

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12
Q

Change in size and shape of the object / magnification

A

Distortion

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13
Q

Image acquisition process that produces an electronic image that can be viewed and manipulated in computer

A

Digital imaging

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14
Q

2 types of digital acquisition modality

A

Digital imaging

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15
Q

Uses phosphor plates placed on a cassette for storage of image

A

Computed Radiography

16
Q

Stored energy from the plate is read by a reader using a laser and converted to electrical signal

A

Computed Radiography

17
Q

Computed radiography was first introduced in the US by

A

Fuji Medical Systems of Japan

18
Q

Uses a flat panel detector or charged coupled devices

Cassette-less

A

Digital Radiography

19
Q

Two type of digital imaging

A

Direct capture

Indirect capture

20
Q

Properties of digital image

A

Spatial resolution
Contrast resolution
Noise

21
Q

The ability to distinguish bet two adjacent structure or area on an image

A

Spatial resolution

22
Q

Refers to the number of individual pixel values per unit length

A

Spatial Resolution

23
Q

Spatial Resolution can be measured using

A

Pixel size

Line pairs per millimeter(lp/mm)

24
Q

Distinguish bet differences in intensity of the image

A

Contrast Resolution

25
Q

Standard in medical image is

A

16 bits

26
Q

In digitized image the _______ determines the contrast resolution

A

Number of gray scale steps

27
Q

Digital equivalent of film grain

A

Image noise

Rad Technique (13 decks)

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