-
who regulates how x-ray equipment is used
state and local govnt
-
Dental x-ray machines may be used to expose ___ receptors or ___ receptors
-
what are 2 examples of extra oral units
-
what 3 components do x-ray machines have
- tubehead
- extension arm
- control panel
-
what houses the vacuum tube, collimator, pID
tubehead
-
what house the electrical wires, suspends and positions the tubehead
extension arm
-
what contains the on/off switch, control devices, exposure button
control panel
-
what allows regulation of the X-ray machine
control panel
-
what is used to hold and align intramural X-ray films in the mouth
film holder
-
what is used to help the radiographer position the PID
beam allignment device
-
what is a metal plate with an opening that can be used to restrict the size of beam and works with the beam alignment device
collimating device
-
what is the recording medium where images are recorded
image receptor
-
what are the 4 basic components of X-ray film
- film base
- adhesive layer
- film emulsion
- protective layer
-
what provides strength and support for emulsion and is contracted to withstand heat, moisture, chemical exposure
film base
-
what covers both sides of film base and is added before emulsion (attaches emulsion to base)
adhesive layer
-
what is a delicate homogenous mixture of gelatin and silver halide crystals attached to both sides of film base by adhesive layer
film emulsion
-
where are the silver halide crystals suspended in gelatin where they absorb radiation and store the energy
film emulsion
-
what gives film greater sensitivity to xradiation
film emulsion
-
what is the thin coating over emulsion that protects it from manipulation, mechanical or processing damage
protective layer
-
what absorbs x-radiation during exposure and stores energy and varies depending on the density of the objects exposed
silver halide crystals
-
if silver halide crystal are not energized and image areas show up more radio opaque than others, then the was the density of the object more or less dense
more
-
what invisible image remains invisible in the emulsion until it undergoes chemical processing procedures
latent image
-
what are irregularities in the lattice structure of the exposed crystals and attracts Ag
sensitivity specks
-
what are aggregates of Ag called
latent image centers
-
intraoral film packets placed inside the mouth come in 5 sizes and have 4 components...
- xray film (double emulsion)
- paper film wrapper (protects/sheilds from light)
- lead foil sheet (shields secondary "fog")
- outer package wrapping (seals,protects)
-
what 2 things protect the film from light
- paper film wrapper
- outer package wrapping
-
what shields the film from secondary, back scatter, radiation "fog"
lead foil sheet
-
what seals the film packet, protects it from light and saliva, and it's solid white side faces the tubehead
outer package wrapping
-
what type of film is used to examine the entire tooth and 2mm of the supporting bone (size 1 or 2)
periapical film (PA)
-
what type of film is used to examine the crowns and inter proximal spaces of both the maxillary/mandibular teeth (size 2)
bitewing film (BW)
-
what type of film is used to examine large areas of the maxilla or mandible (size 4)
occlussal film
-
___ ___ is the amount of radiation required to produce a radiograph of standard density
film speed
-
what is determined by the size of the silver halide crystals, thickness of the emulsion, and the presence of radiosensitive dyes
film speed
-
what determines how much radiation and how much exposure time is necessary to produce an image
film speed
-
faster film requires___radiation exposure because the film responds faster
less
-
__-speed film; nicer image, slower than E or F
D
-
__-speed film is no longer available
E
-
__-speed film is grainier image than D-speed, but 60% less radiation exposure
F
-
what type of film is used to examine large areas of the jaws and teeth
extraoral
-
what type of film gives a wide view of maxilla and mandible and includes both TMJ joints
panoramic film
-
what type of film is used primarily for diagnosis of extraction of teeth, placement of implants, treatment of TMD, and orthodontics
panoramic
-
what type of film is of the profile of a patient, including entire maxillofacial region of bony and soft tissues
cephalometric film
|
|