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Radiography Test Two > Radiography Test Three Choter 8,9, 10,11, Q12, 13,14 > Flashcards

Radiography Test Three Choter 8,9, 10,11, Q12, 13,14 Flashcards

0
Q

Air space freely permits the passage of dental x ray and appears

A

Mostly radiolucent

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1
Q

Radiolucent

A

The portion of the radiograph that is black or dark.

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2
Q

Radiopaque

A

Portion of the processed radiograph that appears light or white.

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3
Q

Density

A

Overall blackness.

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4
Q

Today most modern machine do not allow for adjustment of

A

Milliamprage

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5
Q

Not being able to adjust the milliamprage results in

A

More x rays that the receptor is exposed to thus more density

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6
Q

Contrast

A

The difference in degrees of density ( blackness) between adjacent areas.

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7
Q

The difference in the amount of light transmitted through adjacent areas can also be called

A

Contrast

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8
Q

When viewed on a light source, a dental radiograph that has very dark areas and very little light areas is said to have

A

High contrast.

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9
Q

An increase in development time or development temperature results in a film with

A

High contrast

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10
Q

The range of useful densities seen on a dental radiograph is termed.

A

Scale of contrast.

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11
Q

The smaller the focal spot area

A

The sharper the image.

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12
Q

The larger the focal spot area

A

The greater is the loss of image sharpness.

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13
Q

Manual film processing also known as

A

Hand processing or tank processing

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14
Q

Manual film processings five steps

A

development, rinsing , fixing ,washing ,drying

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15
Q

The first step in manual processing

A

Development-chemical solution known as developer is used. The developer solution softens the film emulsion during this process.

16
Q

To maintain freshness the processing solutions must be

A

Replenished daily and changed every 3 to 4 weeks .more frequent if large numbers of films are processed.

17
Q

Developer solution Hydroquinone

A

Generates the black tones and the sharp contrast of the radiographic image

18
Q

A non mercury thermometer

A

Goes in the developer, it is ness army to determine the temperature of the developer solution. A floating thermometer may be used.

19
Q

The tank on the left is used for

A

Developer

20
Q

The tank on the right is used for

A

The fixer

21
Q

Cleaning film

A

An extra oral size cleaning film thatRemoves any residual gelatin or dirt from rollers.and must be ram through the processor at the beginning of each day

22
Q

A safe light

A

Must be placed a minimume of 4 feet ( 1.2) away from the film and wrk area and unwrapped films must be processed immediately under safe light conditions

23
Q

The duplication of films requires the use of

A

Film duplicator and duplicating film

24
Q

A film duplicator is

A

A light source available through manufactures such as densply rinn corporation

25
Q

A film duplicator provides a

A

Diffused light source

26
Q

Underdeveloped film appears

A

Light

27
Q

An over developed film appears

A

Dark

28
Q

Chemical contamination on films such as developer spots:

A

Dark spots appear on film, are seen when the developer solution comes in contact with the film before processing. The solution is to use clean work are, can place a paper towel.

29
Q

Fixer spots

A

Appearance: white spots on film
Problem:fixer solution come in contact with film befor processing

30
Q

Static electricity

A

Thin black branching lines appears on the film

May result from opening a pack quickly.

31
Q

A fogged film appears

A

Gray and lacks detal and contrast

32
Q

Screens and cassettes : extra oral screens used with a cassette holder

A

Should be periodically examined for dirt and scratches. Screens should be cleaned monthly.

33
Q

The view box

A

Contains fluorescent light bulbs that omits light through a plastic or plexiglass front

34
Q

When functioning properly the view box

A

Should summit a uniformed and subdued light.

35
Q

Proper safe lighting

A

The film should be unwrapped 4 ft away from safe light.

36
Q

Fixer strength

A

Unwrap film place it in fixer take it out if it clears in2 minutes it adequate strength if it doesn’t then re immerse if the film doesn’t completely clear in 3 to 4 minutes the solution is depleted.

Radiography Test Two (2 decks)

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