ALARA
The current MPD for persons occupationally exposed to radiation is
5000 millirem (mrem), or 5.0 rems/year (0.05 Sv/year).
The sharpness of definition of the radiograph is determined by the
Focal spot
Dense structures such as bone and enamel
Absorb more xrays, appear radiopaque
Conecutting of the film is the result of
central ray not being aimed at the center of the film
If there are no teeth to serve as guides, which of the following landmarks indicates a maxillary molar area radiograph?
Tuberosity
The proper filtration for a kvp below 70 is ____aluminim equivalent
1.5 mm aluminim equivalent
Who is known for discovering x-rays?
Professor Wilhelm Roentgen
The number of films that comprise an adult full mouth series
18 to 20
Overlapping is caused by an error of
horizontal angulation
Which of the following landmarks is useful when mounting films in the maxillary posterior area?
Floor of the maxillary sinus
The proper filtration for a kvp at or above 70 is ____aluminim equivalent
2.5 mm aluminim equivalent
The electric current flows through the filament circuit and heats the
cathode filament
For x-ray machines operating in ranges at or above 70 kVp, the total aluminum equivalent filtration must be a minimum of
2.5 mm
Foreshortening of the film is due to ___ of the PID
too much verticle angulation
Which film would be exposed to see the relationship of the alveolar bone?
Vertical bitewing
The current MPD for persons non-occupationally exposed to radiation is
is 0.1 rem/year (0.001 Sv/year).
The positive terminal for electrode in an electric circuit is the
Anode
For a rapid survey of large areas of the maxilla and mandible it is best to use
panoramic xray
An insufficinate amount of verticle angulation will produce an image appearing
elongated
Which of the following landmarks are located by the midline of the mandible?
Genial tubercles
Use ________ collimation instead of round to narrow the beam.
rectangular
Xrays Originate when components in the tube are heated and free electrons are propelled at high speeds toward the
Tungsten target
Which of the following was established to address the education and certification of operators of radiographic equipment?
Consumer-Patient Radiation Health and Safety Act
Which position indication device is considered to be the most advantageous in the reduction of radiation exposure
rectangular cone
Which of the following landmarks is useful when mounting x-rays in the maxillary central area?
Anterior nasal spine