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Intro To Rad w/ STS > Chapter 7: > Flashcards

Chapter 7: Flashcards

1
Q

Positive electrode

A

Anode

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2
Q

a.k.a positive beam limitation (PBL)
• to collimate automatically the x-ray beam to the same size as the image receptor
• prevents unnecessary exposure

A

Automatic collimation

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3
Q

Effect of motion

A

Blur

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4
Q

a.k.a Potter-bucky diaphragm
• moving grid used to remove scatter rad.
• can cause fog on the ir

A

Bucky

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5
Q
  • light proof
  • holding the ir
  • imaging plage for CR or x-ray and intensifying screens
A

Cassette

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6
Q

Negative electorde

A

Cathode

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7
Q
  • box-like structure

* containing lead shutters that limit thr x-ray beam to a specific area of the body

A

Collimator

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8
Q

Digital radiographic imaging using a cassette containing an imaging plate

A

Computed radiography

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9
Q
  • Differences in densities

* Allows detail to be seen

A

Contrast

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10
Q

Video monitor

A

CRT cathode ray tube

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11
Q

Opaqueness/blackening

A

Density

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12
Q

used for bleding a picture archiving & communications system & various imaging modalities

A

DICOM Digital Imaging & Communication is Medicine

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13
Q

uses fixed detectors that directly communicate with a comp.

A

Direct digital radiography, DR

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14
Q

Misrepresentation of the SIZE & SHAPE

A

Distortion

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15
Q

s-number or exposure index that describes the status of the exposure and diagnostic value of the digital image

A

Exposure indicator

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16
Q

Film before exposure to Rad

A

Film

17
Q

Area of the anode

• w/c x-rays emanate

A

Focal spot

18
Q
  • placed bet. the patient & the image receptor

* absorbs scatter rad

A

Grid

19
Q

• graphic display - pixel values

A

Histogram

20
Q

Captures the remnant beam

A

Image receptor

21
Q
  • made of PSP that absorbs the photon energies

* Located inside a computed radiographic cassette

A

Image plate

22
Q

Converts an image information into NUMERICAL DATA

A

ADC

23
Q
  • mounted in the cassette singly or in pairs

* screens glow with visible light when struck by rad.

A

Intensifying screens

24
Q
  • wavelength of the x-ray beam
  • ability to penetrate the body
  • contrast of the rad. image
A

kVp

25
Q

Lead absorbs most of the SR that strikes the apron

A

Lead apron

26
Q

Product of milliamperage & time

Current

A

mAs

27
Q

Made up of rowns and columns of data

A

Matrix

28
Q

Smallest component of matrix

A

Pixel - picture element

29
Q

Automatically develops x-ray film

A

Processor machine

30
Q

Viewed after it has been exposed and processed

A

Radiograph

31
Q

Specific position

A

Radiographic positio

32
Q

As if the body is in the anatomic position

A

Radiographic projectio

33
Q

How rhe inage receptor sees the body image // the opposite of the rad. projection

A

Radiographic view

34
Q

Sharpness of structural lines

A

Recorded detail

Intro To Rad w/ STS (7 decks)

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