Chapter 39
What is the cause of white spots on a processed film?
Fixer contacts film prior to processing
hardens the film emulsion during film processing.
Fixing
A film cassette made of plastic or metal is used to hold and protect the extraoral film. During exposure, the ______ side of the cassette must always face the patient.
Front
-speed film is the newest and fastest film currently available.
Insight
Which is not true of duplicating film's emulsion?
It appears shiny.
Solutions should have been changed in the processor one week ago. Continuing to use exhausted developer will result in films.
Light
Which of the following will affect the life of the processing solutions?
Number of films processed Size of films processed Time elapsed since last change All of the above
Which of the following is an extraoral film that is placed outside the mouth during x-ray
Panoramic
Which is not true of digitizing film-based radiographs?
The process is similar to other film duplication. Desktop scanners capture the light signal. It duplicates the same detail as the original film. All of the above are true
Which is not true of storage plates used with (PSP)?
They are disposable.
Which is not true of image plates?
They should be autoclaved.
The is the safest place to store unopened boxes of dental film
darkroom
A(n) is a device that intensifies or increases the effect of the radiation and amount of exposure time needed when exposing an extraoral radiograph.
intensifying screen
Digital radiography requires less radiation than traditional radiography because the:
sensor is more sensitive to x-ray energy.
The CCD found in direct digital imaging sensors is made of
silicon.
Film speed is determined by the:
size of the silver bromide crystals and thickness of the silver bromide salt
Developer cutoff will result in a, border.
straight white
When placing a dental film in the patient's mouth, the white side is placed
toward; occlusal or incisal
The most commonly used film size for adult intraoral dentistry is size
#2.
The recommended distance between the safelight and where the films are unwrapped is:
4 feet.
The ideal time and temperature for manual developing is:
5 minutes at 68° F
In the automatic processor, the developing solution is normally 81° F to 83° F. If it gets hotter, how will the films look?
Dark or black
Which is the correct order of steps in manual film processing?
Develop, rinse, fix, wash
Which category of digital imaging is similar to faxes and video equipment, which use a sensor with a cord that is attached to the computer?
Direct digital radiography
Dental film holders, used to position and hold the dental x-ray films in the patient's mouth, include which of the following?
Eezee-Grip and EndoRay XCP and disposable block Both b and c
Which of the following time and temperature errors will result in reticulation emulsion?
Sudden temperature change between developer and water bath
The film is lighter than normal; what is the probable cause?
The developer solution is too weak.
The radiographic image is located within the, of radiographic film.
acetate film base
Positioning instruments in digital radiography:
assist in film placement. Keep the patients fingers from being exposed both a and b.
The gallon of fixer is mistaken for developer, and developer is mistakenly thought to be fixer. As a result, films pass through the fixer first, then the developer. Each film will now be:
clear???
A image is produced when x-rays interact with the film emulsion.
latent
Automatic film processing requires, than manual film processing.
less equipment
Extraoral film is:
more sensitive to light than intraoral film.
When loading the film into the cassette before exposure (in extraoral radiography), the:
procedure must be done in the darkroom.
The purpose of the lead foil in the dental film packet is to:
reduce film fogging