Dental Assistant Radiology Final
Review Exam And 100% Correct
Answers (2025) Updated.
Radiology - Answer Science of radiation as used in medicine
Radiation - Answer Electromagnetic rays that travel as waves of energy through space.
Radiograph - Answer Image produced on photosensitive film by exposing film to x-rays and
processing.
X-Radiation (X-Ray) - Answer High energy ionizing electromagnetic radiation
Primary Radiation - Answer Made up of the x-rays that come from the target of the x-ray tube.
AKA:Primary beam or useful beam
Scatter Radiation - Answer Form of radiation produced from any substance being struck by
primary radiation
Secondary Radiation - Answer Form of radiation produced from any substance being struck by
primary radiation
Dose - Answer Amount of energy absorbed by tissues
Somatic Effect - Answer Effect of radiation causing illness and responsible for poor health
Genetic Effects - Answer Radiation effects passed on to future generations through genetic
cells
Bitewing Radiograph(BWX) - Answer Radiographic film that show the interproximal areas,
crowns of the maxillary and mandibular teeth on the same film
Central Beam - Answer Central portion of the primary beam of radiation
, Cone Cut - Answer The central beam misses the center of the film and produces a blank area
cutting off the edge of the film
Electromagnetic Radiation - Answer Series of electromagnetic waves
Elongation - Answer Describes distortion of image, appearing longer than actuality.
Extraoral - Answer X-ray film packet placed outside the oral cavity during exposure.
Foreshortening - Answer Distortion of image; Appears shorter than actuality.
Horizontal - Answer Side to side motion.
Intraoral - Answer Film packet placed inside oral cavity during exposure.
Ionizing Radiation - Answer Radiation that produces ionization, resulting in harmful effects.
Kilovolt - Answer Unit of electromotive force, equal to 1000 volts, drives electric current
through circuit.
Latent Period - Answer TIme between exposure to ionizing radiation and appearamce of
symptoms.
Lead Apron - Answer Heavy lead lined, plastic apron to drape over patient for protection
during x-rays
Lead Shield - Answer Lead lined wall or movable shield for students/staff to stand behind
while exposing x-rays.
Millampere (mA) - Answer One thousandth (1/1000) of ampere, unit of measurement used to
describe intensity of electric current
Midsagittal Plane - Answer Imaginary line dividing tooth longitudinally (vertically) into two
Review Exam And 100% Correct
Answers (2025) Updated.
Radiology - Answer Science of radiation as used in medicine
Radiation - Answer Electromagnetic rays that travel as waves of energy through space.
Radiograph - Answer Image produced on photosensitive film by exposing film to x-rays and
processing.
X-Radiation (X-Ray) - Answer High energy ionizing electromagnetic radiation
Primary Radiation - Answer Made up of the x-rays that come from the target of the x-ray tube.
AKA:Primary beam or useful beam
Scatter Radiation - Answer Form of radiation produced from any substance being struck by
primary radiation
Secondary Radiation - Answer Form of radiation produced from any substance being struck by
primary radiation
Dose - Answer Amount of energy absorbed by tissues
Somatic Effect - Answer Effect of radiation causing illness and responsible for poor health
Genetic Effects - Answer Radiation effects passed on to future generations through genetic
cells
Bitewing Radiograph(BWX) - Answer Radiographic film that show the interproximal areas,
crowns of the maxillary and mandibular teeth on the same film
Central Beam - Answer Central portion of the primary beam of radiation
, Cone Cut - Answer The central beam misses the center of the film and produces a blank area
cutting off the edge of the film
Electromagnetic Radiation - Answer Series of electromagnetic waves
Elongation - Answer Describes distortion of image, appearing longer than actuality.
Extraoral - Answer X-ray film packet placed outside the oral cavity during exposure.
Foreshortening - Answer Distortion of image; Appears shorter than actuality.
Horizontal - Answer Side to side motion.
Intraoral - Answer Film packet placed inside oral cavity during exposure.
Ionizing Radiation - Answer Radiation that produces ionization, resulting in harmful effects.
Kilovolt - Answer Unit of electromotive force, equal to 1000 volts, drives electric current
through circuit.
Latent Period - Answer TIme between exposure to ionizing radiation and appearamce of
symptoms.
Lead Apron - Answer Heavy lead lined, plastic apron to drape over patient for protection
during x-rays
Lead Shield - Answer Lead lined wall or movable shield for students/staff to stand behind
while exposing x-rays.
Millampere (mA) - Answer One thousandth (1/1000) of ampere, unit of measurement used to
describe intensity of electric current
Midsagittal Plane - Answer Imaginary line dividing tooth longitudinally (vertically) into two
