Modern Dental Assisting Radiology
Final Exam with All Correct Answers
(2025-2026) Updated.
ALARA - Answer As Low As Reasonably Achievable
Anode - Answer The positive electrode in the x-ray tube. It is composed of a tungsten target
that is embedded in the larger copper stem.
atom - Answer basic unit of matter
Bremsstrahlung radiation - Answer "Braking radiation." The sudden deceleration of electrons
as they interact with highly positively charged nuclei.
Cathode - Answer The negative electrode in the x-ray tube. Consists of a tungsten filament in a
focusing cup made of molybdenum. The cathode supplies the electrons necessary to generate x-
rays
Central ray - Answer x-rays at the center of the beam
contrast - Answer differences in degrees of blackness on an image
control panel - Answer the portion of the x-ray unit that contains the master switch, the
indicator light, the selector buttons, and the exposure button.
Density - Answer The overall darkness or blackness of an image.
Dental Radiography - Answer the process of recording images of the teeth and adjacent
structures by exposure to x-radiation.
Digital imaging - Answer A filmless method of capturing an image and displaying it by using an
image receptor, an electronic signal, and a computer to process and store the image.
, Dosimeter - Answer A device used to detect and measure an accumulated dosage of radiation
Electron - Answer a negatively charged particle in the atom
Extension Arm - Answer Flexible arm that is attached to the x-ray tubehead
Genetic effects - Answer Effects of radiation that are passed on to future generations through
genetic cells
image - Answer film-based or digitally produced recordings of anatomic structures.
Image receptor - Answer A recording medium for an image, normally film, phosphor storage
plate (PSP), or a digital sensor.
Intensity - Answer the total energy of the x-ray beam.
Ion - Answer an electrically charged particle
Ionization - Answer Process by which electrons are removed from atoms, causing the harmful
effects of radiation in humans
Ionizing - Answer Radiation that produces ionization, resulting in harmful effects
Kilovoltage - Answer Highest voltage of x-ray tube used during an exposure
Latent - Answer Time between exposure to ionizing radiation and appearance of symptoms
Lead apron - Answer Device used to protect the reproductive and blood forming tissues from
scatter radiation
magnification - Answer The proportional enlargement of an image
Final Exam with All Correct Answers
(2025-2026) Updated.
ALARA - Answer As Low As Reasonably Achievable
Anode - Answer The positive electrode in the x-ray tube. It is composed of a tungsten target
that is embedded in the larger copper stem.
atom - Answer basic unit of matter
Bremsstrahlung radiation - Answer "Braking radiation." The sudden deceleration of electrons
as they interact with highly positively charged nuclei.
Cathode - Answer The negative electrode in the x-ray tube. Consists of a tungsten filament in a
focusing cup made of molybdenum. The cathode supplies the electrons necessary to generate x-
rays
Central ray - Answer x-rays at the center of the beam
contrast - Answer differences in degrees of blackness on an image
control panel - Answer the portion of the x-ray unit that contains the master switch, the
indicator light, the selector buttons, and the exposure button.
Density - Answer The overall darkness or blackness of an image.
Dental Radiography - Answer the process of recording images of the teeth and adjacent
structures by exposure to x-radiation.
Digital imaging - Answer A filmless method of capturing an image and displaying it by using an
image receptor, an electronic signal, and a computer to process and store the image.
, Dosimeter - Answer A device used to detect and measure an accumulated dosage of radiation
Electron - Answer a negatively charged particle in the atom
Extension Arm - Answer Flexible arm that is attached to the x-ray tubehead
Genetic effects - Answer Effects of radiation that are passed on to future generations through
genetic cells
image - Answer film-based or digitally produced recordings of anatomic structures.
Image receptor - Answer A recording medium for an image, normally film, phosphor storage
plate (PSP), or a digital sensor.
Intensity - Answer the total energy of the x-ray beam.
Ion - Answer an electrically charged particle
Ionization - Answer Process by which electrons are removed from atoms, causing the harmful
effects of radiation in humans
Ionizing - Answer Radiation that produces ionization, resulting in harmful effects
Kilovoltage - Answer Highest voltage of x-ray tube used during an exposure
Latent - Answer Time between exposure to ionizing radiation and appearance of symptoms
Lead apron - Answer Device used to protect the reproductive and blood forming tissues from
scatter radiation
magnification - Answer The proportional enlargement of an image
