Ch 39 digital imaging

The most commonly used size for adult intraoral dentistry is size: a. #0 b. #2 c. #3 d. #4

b. #2

The recommended distance between the safelight and where the films are unwrapped is: a. 2ft b. 4ft c. 6ft d. as close as possible

b. 4ft

Which is the correct order of steps in manual film processing? a. Fix, rinse, develop, wash b. Develop, rinse, fix, wash c. Fix, wash, rinse, wash d. Rinse, develop, fix, wash

b. Develop, rinse, fix, wash

Which is not true of duplicating film's emulation? a. It only appears on one side b. It appears shiny c. It appears dull d. It is exposed by light

b. It appears shiny

The purpose of the lead foil in the dental film packet is to: a. Provide stiffness to the film b. Reduce film fogging c. Absorb primary beam d. Make the packet more flexible and resilient

b. Reduce film fogging

The____ is the safest place to store unknown boxes of dental film. a. Darkroom b. Furnace room c. Refrigerator d. Treatment room

a. Darkroom

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: a. clear b. completely black c. gray d. yellowish-brown

a. clear

In the automatic processor, the developing solution is normally 81 degrees F to 83 degrees F. If it gets hotter, how will the films look? a. dark or black b. gray c. clear d. light

a. dark or black

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. a. front b. back c. right d. left

a. front

The CCD found in direct digital imaging sensors is made of: a. silicon b. phosphor c. tungsten d. silver halide

a. silicon

Developer cutoff will result in a ____ border. a. straight white b. straight black c.curved white d. curved black

a. straight white

The film is lighter than normal; what is the probable cause? a. the developer is too weak b. the developer is too warm c. the fixer solution is too weak d. the film was not properly rinsed

a. the developer is too weak

When placing a dental film in the patients mouth, the white side is placed _____ the tube and the raised dot to the ______. a. Toward; apical b. Toward; occlusal or incisal c. Away; apical d. Away; occlusal or incisal

b. Toward ; occlusal or incisal

Automatic film processing requires ___ than manual film processing. a. more time b. less equipment c. more equipment d. more space

b. less equipment

Solutions should have been changed in the processor one week ago. Continuing to use exhausted developer will result in ___ films. a. dark b. light c. white d. clear

b. light

When loading the film into the cassette before exposure (in extraoral radiography), the: a. film comes preloaded in the cassette b. procedure must be done in the darkroom c. film may be placed in the holder outside the darkroom d. film does not need an intensifying screen

b. procedure must be done in the darkroom

Which is not true of image plates? a. they need to be protected in the patient's mouth with barriers b. they should be autoclaved c. they require care not to scratch when handling d. they are positioned in the mouth like dental film

b. they should be autoclaved

The ideal time and temperature for manual developing is: a. 45 seconds at 85° F b. 5 minutes at 65° C c. 5 minutes at 68° F d. 5 minutes at 60° F

c. 5 minutes at 68° F

_____ hardens the film emulsion during film processing a. Rinsing b. Developing c. Fixing d. Washing

c. Fixing

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? a.computed radiograph programs b. indirect digital radiography c. direct digital radiography d. none of the above

c. direct digital radiography

What is the cause of white spots on a processed film? a. static electricity b. solutions are too warm c. fixer contacts film prior to processing d. drops of developer

c. fixer contacts film prior to processing

The radiographic image is located within the _____ of the radiographic film. a. acetate film base b. adhesive layer that attaches the emulsion to the film base c. gelatin that suspends the emulsion d. protective layer that protects the emulsion surface

c. gelatin that suspends the emulsion

An __ is a device that intensifies or increases the effect of the radiation and decreases the amount of exposure time needed when exposing an extraoral radiograph. a. screen film b. film cassette c. intensifying screen d. nonscreen film

c. intensifying screen

Which is not true of digitizing film-based radiographs? a. the process is similar to other film duplication b. desktop scanner capture the light signal c. it duplicates the same detail as the original film d. all of the above are true

c. it duplicates the same detail as the original film

A _____ image is produced when the x-rays interact with the film emulsion? a. visible b. distorted c. latent d. none of the above

c. latent

Which of the following is an extraoral film that is placed outside the mouth during x-ray exposure? a. periapical b. bite-wing c. panoramic d. occlusal

c. panoramic

Digital radiography requires less radiation than traditional radiography because the: a. exposure time is increased b. sensor is smaller c. sensor is more sensitive to x-ray energy d. sensor is attached to the computer

c. sensor is more sensitive to x-ray energy

Which of the following time and temperature errors will result in reticulation of the film emulsion? a. inadequate development time b. developer solution too hot c. sudden temperature change between developer and water bath d. inaccurate timer or thermometer

c. sudden temperature change between developer and water bath

Which of the following will affect the life of the processing solutions? a. number of films processed b. time elapsed c. size of films processed d. all of the above

d. all of the above

Positioning instruments in digital radiography: a. Assist in film placement b. Keep the patient's fingers from being exposed c. Should not be used d. both a and b

d. both a and b

Film speed is determined by the: a. Thickness of silver bromide salt b. Thickness of cellulose acetate base c. Size of the silver bromide crystals d. both a and c

d. both a and c

Dental film holders, used to position and hold the dental x-ray films in the patient's mouth, include which of the following? a. PID b. XCP and disposable block c. EeZee-Grip and EndoRay d. both b and c

d. both b and c

__-speed film is the newest and fastest film currently available. a. b b. c c. d d. f

d. f

Extraoral film is: a. not sensitive to light b. less sensitive to light than intraoral film c. just as sensitive to light as intraoral film d. more sensitive to light than intraoral film

d. more sensitive to light than intraoral film

Which is not true of storage plates used with (PSP)? a. they are made of phosphor b. the latent image will stay on the plate for hours c. they should not be exposed to light before scanning d. they are disposable

d. they are disposable