Computed Radiology Flashcards

(35 cards)

1
Q

is a digital radiographic imaging modality that uses a photostimulable storage phosphor imaging plate (PSP or IP), typically inside a cassette.

A

Computed radiography (CR)

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2
Q

As computer technology has advanced, so too has the ability of __ to produce images comparable to, and many instances better than, film.

A

CR Computed Radiography

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3
Q

It was in ____ that commercialization if CR imaging systems for use in diagnostic radiology began, when Fuji introduced their FCR-101 unit.

A

1983

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4
Q

Today there are atleast four manufacturers actively engaged in CR research technology development and marketing.

A

They are FUJI, AGFA GAVAERT, KODAK AND KONICA.

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5
Q

First of the famous company

A

Fuji

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6
Q

What are the Big Four

A

FUJI
AGFA GAVAERT
KODAK AND KONICA.

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7
Q

is a rigid sheet with several layers that are designed to record and enhance transmission of the image from a beam of ionizing radiation

A

PHOTOSTIMULABLE IMAGING

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8
Q

The ____ consists of a durable, lightweight plastic material backed with a thin sheet
of aluminum that absorbs xray.

A

cassettes

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9
Q

is the chemical coating on a phosphor plate
in a computed radiography system.

A

PHOTOSTIMULABLE PHOSPHOR (PSP)

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10
Q

Instead of _____ (found in film imaging ) there is an anti -static material
that protects against static electricity build up, dust collection, and
mechanical damage to plate.

A

intensifying screen

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11
Q

This was followed by other manufacturers, most notably _____ whose systems became popular as well.

A

Kodak and Agfa

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12
Q

thin, tough, clear plastic that protects the active phosphor layer.

A

PROTECTIVE LAYER

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13
Q

a. Made of carbon fiber or Magnesium

A

PROTECTIVE LAYER

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14
Q

b. No image producing qualities

A

PROTECTIVE LAYER

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15
Q

This layer of Photostimulable phosphor from the barium
fluorohalide family.

A

PHOSPHOR OR ACTIVE LAYER

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16
Q

a. Ability to store and release energy.

A

PHOSPHOR OR ACTIVE LAYER

17
Q

Layer of material that grounds the IP from electrostatic charge

A

CONDUCTIVE LAYER

18
Q

a. Increases spatial resolution
by absorbing light.

A

CONDUCTIVE LAYER

19
Q

Semi -rigid material that gives the imaging sheet some strength.

A

SUPPORTIVE LAYER

20
Q

Sends light in a forward direction when
released in the reader.

A

LIGHT SHIELD ( REFLECTIVE LAYER)

21
Q

Prevent unwanted light from affecting the unexposed latent image.

A

LIGHT SHIELD ( REFLECTIVE LAYER)

22
Q

Soft Polymer that protects the back of the cassette.

A

BACKING LAYER

23
Q

a. Prevent unwanted background radiation from affecting the unexposed latent image.

A

BACKING LAYER

24
Q

The ___ is loaded into a cassette that looks much like a radiographic
and intensifying-screen cassette.

A

imaging plate

25
In order for CR to function,
the imaging plate material must have the ability to store and release the image information in a usable form.
26
most% common phosphore w/ characteristics favorable for CR.
Fluorohalide bromides & iodides w/ europium activators
27
- 35 to 50 keV -- within diagnostic range
Barium
28
imaging plate is also called as
“filmless cassette”.
29
( 85% )
bromide
30
( 15% )
iodine
31
- 35 to 40 keV -- absorption efficiency is low and and have similar quantum noise outside the optimal range.
Rare Earth
32
35 to 40 keV
Rare Earth
33
35 to 50 keV
Barium
34
will absorb more low-energy scatter than the rare earth phosphor and film, which means appropriate kvp,collimation, and masking must be used to optimal images.
Imaging plate phosphor
35
refers to the mechanism of xray interaction with the phosphor to produce latent image
Image acquisition