Dental Assistant Radiology: Key Concepts and Questions
Air has been removed form the XRay tube why? - ansTo create a vacuum environment that allows the electrons
to flow with minmum resistance between the electrodes (cathode and anode)
Aluminum Filter is used to remove what items from the beam? - ansLow Energy
Long-Wavelength
Least penetrating x-rays
An important function in postioning the tube head..? - ansExtension arm
Anode - ansPositive electrode that acts as the target for the electrons.
Bitewing Radiograph(BWX) - ansRadiographic film that show the interproximal areas, crowns of the maxillary
and mandibular teeth on the same film
BWX (BiteWings Radiograph) recommended every how many years? - ans2 years
Cathode - ansNegative electrode that consists of a tungsten filament in a focusing made of molybdenum with a
purpose of supplinh the electrons necessary to generate x-rays
Central Beam - ansCentral portion of the primary beam of radiation
Cone Cut - ansThe central beam misses the center of the film and produces a blank area cutting off the edge of
the film
Cylinder - anscomponent affixed to the tube head that helps align the patient and film when positioning film
Dose - ansAmount of energy absorbed by tissues
, Electromagnetic Radiation - ansSeries of electromagnetic waves
Elongation - ansDescribes distortion of image, appearing longer than actuality.
Extraoral - ansX-ray film packet placed outside the oral cavity during exposure.
Foreshortening - ansDistortion of image; Appears shorter than actuality.
Genetic Effects - ansRadiation effects passed on to future generations through genetic cells
Horizontal - ansSide to side motion.
How long is the X-ray tube?? - ansAbout 6 inches long
(1inch in diameter)
Intraoral - ansFilm packet placed inside oral cavity during exposure.
Ionizing Radiation - ansRadiation that produces ionization, resulting in harmful effects.
Kilovolt - ansUnit of electromotive force, equal to 1000 volts, drives electric current through circuit.
Latent Period - ansTIme between exposure to ionizing radiation and appearamce of symptoms.
Lead Apron - ansHeavy lead lined, plastic apron to drape over patient for protection during x-rays
Lead Shield - ansLead lined wall or movable shield for students/staff to stand behind while exposing x-rays.
Air has been removed form the XRay tube why? - ansTo create a vacuum environment that allows the electrons
to flow with minmum resistance between the electrodes (cathode and anode)
Aluminum Filter is used to remove what items from the beam? - ansLow Energy
Long-Wavelength
Least penetrating x-rays
An important function in postioning the tube head..? - ansExtension arm
Anode - ansPositive electrode that acts as the target for the electrons.
Bitewing Radiograph(BWX) - ansRadiographic film that show the interproximal areas, crowns of the maxillary
and mandibular teeth on the same film
BWX (BiteWings Radiograph) recommended every how many years? - ans2 years
Cathode - ansNegative electrode that consists of a tungsten filament in a focusing made of molybdenum with a
purpose of supplinh the electrons necessary to generate x-rays
Central Beam - ansCentral portion of the primary beam of radiation
Cone Cut - ansThe central beam misses the center of the film and produces a blank area cutting off the edge of
the film
Cylinder - anscomponent affixed to the tube head that helps align the patient and film when positioning film
Dose - ansAmount of energy absorbed by tissues
, Electromagnetic Radiation - ansSeries of electromagnetic waves
Elongation - ansDescribes distortion of image, appearing longer than actuality.
Extraoral - ansX-ray film packet placed outside the oral cavity during exposure.
Foreshortening - ansDistortion of image; Appears shorter than actuality.
Genetic Effects - ansRadiation effects passed on to future generations through genetic cells
Horizontal - ansSide to side motion.
How long is the X-ray tube?? - ansAbout 6 inches long
(1inch in diameter)
Intraoral - ansFilm packet placed inside oral cavity during exposure.
Ionizing Radiation - ansRadiation that produces ionization, resulting in harmful effects.
Kilovolt - ansUnit of electromotive force, equal to 1000 volts, drives electric current through circuit.
Latent Period - ansTIme between exposure to ionizing radiation and appearamce of symptoms.
Lead Apron - ansHeavy lead lined, plastic apron to drape over patient for protection during x-rays
Lead Shield - ansLead lined wall or movable shield for students/staff to stand behind while exposing x-rays.
