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WorksheetsRadiology Week 13
Total questions: 40
Worksheet time: 26mins
The dental x-ray film is an image receptor that has four basic components. Select them.
A film base
An adhesive layer
Film emulsion
Protective layer
Rare earth screen
1. Silver halide crystals in the film emulsion absorb the x-radiation during the x-ray exposure and store the energy from the radiation.
2. The stored energy forms an invisible pattern on the emulsion and is known as the latent image.
First statement true, second false
First statement false, second true
Both true
Both false
Select the 3 types of film used in dental radiography.
Intraoral
Extraoral
Duplicating
Replicating
Intraoral films are manufactured in five sizes (0, 1, 2, 3, 4).
True
False
F-speed film reduces patient exposure to radiation by 60% compared to D-speed film, with no loss of image contrast or quality.
True
False
The identification dot on the intraoral film is significant because it:
indicates the patient's right or left side
determines film orientation
is important in film mounting
all of the above
One advantage of a film with an emulsion coating on both sides is that:
The film requires less radiation exposure to create an image
the image produced is less distorted
the film has less sensitivity to radiation
processing solutions are absorbed more easily
What is the purpose of the lead foil sheet in the film packet?
protect the film from primary radiation
protect the film from saliva
protect the film from backscatter radiation
distinguish between the patient's right and left sides
What information is not found on the label side of the film packet?
film speed
expiration date
the phrase "opposite side toward tube"
number of films enclosed
Which film size is known as the standard film?
0
1
2
3
The film characteristic that is "the amount of radiation needed to produce a radiograph of standard density" is?
contrast
speed
image resolution
size
The speed of a film is determined by the size of the halide crystals in the emulsion. Identify the true statement.
The larger the crystals, the faster the film speed
The larger the crystals, the slower the film speed
The smaller the crystals, the faster the film speed
None of the above
A screen film is more sensitive to fluorescent light than to direct exposure to x-rays?
True
False
The device that transfers x-ray energy into visible light is termed?
cassette
nonscreen film
screen film
intensifying screen
Which of the following statements is true?
Cassettes are available in sizes that correspond to film and screen sizes.
A flexible cassette is more expensive than is a rigid cassette
Film can be loaded incorrectly in the rigid cassette
None of the above
Which of the following results if the intensifying screens are not in perfect contact with the screen film?
The screen may be damaged
The film may be damaged
A loss of image sharpness occurs.
None of the above
The pattern of stored energy on an exposed film is termed the (a) image. This image remains invisible until it undergoes processing.
1. The developer distinguishes between exposed and unexposed silver halide crystals.
2. It reduces exposed silver halide into metallic silver and creates black areas on film.
First statement true, second false
First statement false, second true
Both true
Both false
The developer solution is time and temperature sensitive.
True
False
1. The fixer solution removes unexposed silver halide crystals.
2. It creates white or clear areas on the film. It hardens the gelatin emulsion, and sets the film so it can be safely handled.
First statement true, second false
First statement false, second true
Both true
Both false
Underdeveloped films may result from a (a) (low, high) developer temperature.
Overdeveloped films may result from a (a) (low, high) developer temperature.
A reticulation of the emulsion will result in a cracked appearance because of a sudden temperature change between the developer and water bath.
True
False
This type of chemical contamination results when the developer comes in contact with the film before processing.
(a)
This type of chemical contamination results when the fixer comes in contact with the film before processing.
(a)
This film handling problem results in an undeveloped portion of the film due to a low level of developer.
(a)
This film handling problem results in an unfixed portion of the film due to a low level of fixer
(a)
This film handling problem results in two films contacting each other during processing.
(a)
This film handling problem (white spots) results due to air trapped on the film surface after being placed in the processing solutions
(a)
This film handling problem results due to accidental exposure of film to white light
(a)
In manual film processing the rinsing step is necessary because:
removes the silver halide crystals from the emulsion
slows down the fixing process
removes the developer from the film and stops the development process
none of the above
In manual film processing, the optimal temperature for the developer solution is:
55 F
68 F
70 F
84 F
Any leaks of white light into the darkroom will cause:
film reticulation
film fogging
overdeveloped films
underdeveloped films
A replenisher is added to the processing solution to:
compensate for the loss of solution strength
ensure uniform results between solution changes
compensate for the loss of volume of solution
compensate for oxidation
all of the above
The super concentrated solution that is added to the processing solution to compensate for the effects of oxidation is termed:
hardener
replenisher
oxidizer
emulsifier
After processing fresh film that has been properly stored and protected will appear:
fogged
clear with a slight blue tint
clouded with a blue tint
dark blue
One of the most critical areas of quality control that requires daily monitoring is:
examination of the darkroom for light-tightness
cleaning the extraoral intensifying screens
processing of films
all of the above
The coin test is used to check:
proper safelighting
strength of processing solution
film density
none of the above
The following must be closely monitored with manual processing techniques:
temperature of the water bath
levels of the processing solutions
accuracy of the timer
accuracy of the thermometer
all of the above
The clearing test is used to monitor:
developer strength
fixer strength
accuracy of the timer
film density
