Digital Radiography
What are the two types of digital imaging?
Direct and Indirect
What are positioning instruments used for?
To position and hold dental x-ray films or the digital sensor in the patients mouth.
What is the image called when it is not yet visible before processing?
latent image
A series of steps that change the latent image on the exposed film into a radio graph by producing a visible image on the film.
Processing
What are coating on the x ray film that contains energy-sensitive crystals?
Emulsion
What is used as the image receptor in direct digital imaging?
A solid-state sensor
What 2 holders can be used for the bisecting technique?
Snap-a-Ray and Eezee-Grip
When placing a dental film in the patient’s mouth, the white side is placed ____ the dental x-ray tubehead, and the raised dot to the ____ surface.
toward; occlusal or incisal
What is the first step in processing film?
Developing
What is a solid-state image sensor used it intraoral digital imaging?
Charge-coupled device (CCD)
The category of digital imaging similar to faxes and video equipment that uses a sensor with a cord attached to the computer is:
direct digital imaging
What device assists in positioning the PID in relation to the tooth and film or sensor?
The beam alignment device
What are the components of intraoral film?
vinyl packaging, inner white paper, lead foil and dental film
A low intensity light in the dark room
safelight
What is a common type of phosphor?
Calcium Tungstate
True or False: Digital radiography requires less radiation than traditional radiography because the sensor is more sensitive to x-ray energy.
True
Name the three colored sensor holders and what they are used for.
Red=bitewing, blue=anterior PA, yellow=posterior PA
What is a plastic or metal case that is used to hold the film and protect it from exposure to light?
Cassette
The ideal darkroom has what 3 things?
1. an adequate working space, proper lighting, good ventilation; 2. be kept clean at all times; 3. be equipped with necessary devises and supplies.
What is the sensitivity of the emulsion on the film to radiation called?
Film Speed
Name 3 things the operator can change.
Contrast, Brightness, Image size, Sharpness, Inversion, or Pseudocolor alteration.
What is the primary difference between a film holder and a digital sensor holder?
The size and shape of the holder
Which type of intensifying screen produces a blue light?
calcium tungstate
What are the five steps (in order) in manually processing dental radiographs?
Development, Rinsing, Fixation, Washing, and Drying.
What is the part inside an extraoral cassette that converts x ray energy into visible light, which in turn exposes screen film?
intensifying screen