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Lmrt 221 > Ira Week 2 - Week Quiz (221) > Flashcards

Ira Week 2 - Week Quiz (221) Flashcards

1
Q

What is the purpose of aluminum in cassette ?

A

Absorbs scatter

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2
Q

Purpose of felt material?

A

Helps w/ static

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3
Q

What layer traps electrons

A

Active layer.

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4
Q

What happens in color layer?

A

Absorbs I reflective light.

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5
Q

Reflective color layer reflects light where?

A

Forward

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6
Q

Why barcode on cassettes?

A

Identifies patient.

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7
Q

Specific phosphor?

A

Barium fluoride.

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8
Q

Electrons get absorbed
In what layer

A

Phosphor layer.

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9
Q

Layer beam reads cassette (in raster) what’s happening to atoms?

A

Bombarding each other

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10
Q

What way are photons traveling

A

Traveling in same direction

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11
Q

How often is cassette used

A

50 cassettes per hour

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12
Q

Digitization what happens

A

Photons getting assigned #’s (being translated)

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13
Q

How does layer scan cassette?

A

, In raster pattern

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14
Q

What determines PSP resolution.(3)

A

A pixel, # of pixels and how thick phosphor layer

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15
Q

How to erase image?

A

Flashbange ( flush w/light)

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16
Q

What can happen if we select wrong body type?

A

Misinteriptation

17
Q

Key/main word refers to k.v.p

A

Penetration

18
Q

Range for k.e.v (k-edge)?

A

30 - 50 K.E.V.

19
Q

Mas=

A

Think of #of electrons

20
Q

What happens w/not enough light?

A

Grainy image

21
Q

High # of pixel does what to an image resolution

A

High resolution

22
Q

Grid used for PSP than film why?

A

Density (more)

23
Q

Grid terms (3) - r, f, & F.

A

Ratio-height /space
Frequency- more lines
Focus-central beam

24
Q

The range for k.v.p that can be used with PSP system is

A

45-120

25
Q

The exposure indicator

A

An indication of radiation absorbed by the imaging plate

26
Q

Intermittent extraneous line patterns are [blank] artifacts

A

Plate reader

Lmrt 221 (6 decks)

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