©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 8:22PM. A+
GXMO Ohio Study Guide 100% Verified And
Updated 2025
Absorption - Answer✔When all of the x-ray energy is absorbed by the ejected electron
acute radiation syndrome - Answer✔Radiation sickness that occurs in humans after whole-body
doses of 1 Gy (100 rad) or more of ionizing radiation delivered over a short time not seen in
diagnostic imaging
ALARA - Answer✔(radiation exposure)As Low As Reasonably Achievable
Anatomic Position - Answer✔The position in which the patient is standing erect; with the face
directed forward, arms extended by the sides with the palms facing forward, and the toes
pointing anteriorly
Anatomically Programmed Radiography (APR) - Answer✔Technique by which graphics on the
console guide the operator in selection of a desired kVp and mAs
Angiography - Answer✔The fluoroscopic imaging of blood vessels
Anode - Answer✔Positively charged side of an x-ray tube that contains the target
Anterior-Posterior - Answer✔from front to back
American Registry of Radiologic Technologists (ARRT) - Answer✔The world's largest
credentialing organization in medical imaging, interventional procedures, and radiation
therapy; certify and register technologists through administration of education, ethics and
examination requirements.
Artifact - Answer✔Unintended optical density on a radiograph or another film-type image
receptor
American Society of Radiologic Technologists (ASRT) - Answer✔Professional organization that
promotes research, continuing education and guidelines for radiography instruction
Atom - Answer✔Smallest particle of an element that cannot be divided or broken by chemical
means
Atomic Number (Z) - Answer✔number of protons in the nucleus
Attenuation - Answer✔absorption of the x-ray beam in matter, usually the human body
1|Page
, ©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 8:22PM. A+
Automatic Exposure Control (AEC) - Answer✔feature/device that determines radiation
exposure during radiography in most x-ray imaging systems
Back-up time - Answer✔when the exposure timer is manually set by the operator to a time
greater than the anticipated exposure time
Bergonie-Tribondeau law - Answer✔principle that states that the radiosensitivity of cells is
directly proportional to their reproductive activity and inversely proportional to their degree of
differentiation
Binding energy - Answer✔the energy required to separate a single particle or group of particles
from a molecule, atom, or nucleus
Biological Damage - Answer✔the damage produced from exposure to radiation
Bremsstrahlung x-ray - Answer✔x-ray that results from interaction of the projectile electron
with a target nucleus, also known as breaking radiation
Bucky Tray - Answer✔a device that contains a moving grid
Caliper - Answer✔a tool used for body part measurement
Cardinal Principles of Radiation Protection - Answer✔The methods used to protect operators
from unnecessary radiation exposure; time, distance and shielding
Cassette - Answer✔A rigid holder that contains the film and screens
Cathode - Answer✔negative side of the x-ray tube, contains the filament and the focusing cup
Central Ray - Answer✔Center of the primary x-ray beam that interacts with the image receptor
Characteristic Radiation - Answer✔One of two types of x-ray productions. created when an
electron enters the tungsten anode of the x-ray tube and knocks out a K-shell electron. This
interaction produces an x-ray photon
Coherent Scattering - Answer✔Scattering of x-rays with no loss of energy; also called classical
scattering
Collimation - Answer✔Restriction of the useful x-ray beam to reduce patient dose and improve
image contrast
Collimator - Answer✔boxlike device attached under the tube housing which allows the x-ray
operator to vary the beam size and shape
Compensating Filter - Answer✔Material Inserted between an x-ray source and a patient to
shape the intensity of the x-ray beam
Compton Scattering - Answer✔Interaction between an x-ray and a loosely bound outer-shell
electron that results in ionization and x-ray scattering
2|Page
GXMO Ohio Study Guide 100% Verified And
Updated 2025
Absorption - Answer✔When all of the x-ray energy is absorbed by the ejected electron
acute radiation syndrome - Answer✔Radiation sickness that occurs in humans after whole-body
doses of 1 Gy (100 rad) or more of ionizing radiation delivered over a short time not seen in
diagnostic imaging
ALARA - Answer✔(radiation exposure)As Low As Reasonably Achievable
Anatomic Position - Answer✔The position in which the patient is standing erect; with the face
directed forward, arms extended by the sides with the palms facing forward, and the toes
pointing anteriorly
Anatomically Programmed Radiography (APR) - Answer✔Technique by which graphics on the
console guide the operator in selection of a desired kVp and mAs
Angiography - Answer✔The fluoroscopic imaging of blood vessels
Anode - Answer✔Positively charged side of an x-ray tube that contains the target
Anterior-Posterior - Answer✔from front to back
American Registry of Radiologic Technologists (ARRT) - Answer✔The world's largest
credentialing organization in medical imaging, interventional procedures, and radiation
therapy; certify and register technologists through administration of education, ethics and
examination requirements.
Artifact - Answer✔Unintended optical density on a radiograph or another film-type image
receptor
American Society of Radiologic Technologists (ASRT) - Answer✔Professional organization that
promotes research, continuing education and guidelines for radiography instruction
Atom - Answer✔Smallest particle of an element that cannot be divided or broken by chemical
means
Atomic Number (Z) - Answer✔number of protons in the nucleus
Attenuation - Answer✔absorption of the x-ray beam in matter, usually the human body
1|Page
, ©FYNDLAY 2024/2025 ALL RIGHTS RESERVED 8:22PM. A+
Automatic Exposure Control (AEC) - Answer✔feature/device that determines radiation
exposure during radiography in most x-ray imaging systems
Back-up time - Answer✔when the exposure timer is manually set by the operator to a time
greater than the anticipated exposure time
Bergonie-Tribondeau law - Answer✔principle that states that the radiosensitivity of cells is
directly proportional to their reproductive activity and inversely proportional to their degree of
differentiation
Binding energy - Answer✔the energy required to separate a single particle or group of particles
from a molecule, atom, or nucleus
Biological Damage - Answer✔the damage produced from exposure to radiation
Bremsstrahlung x-ray - Answer✔x-ray that results from interaction of the projectile electron
with a target nucleus, also known as breaking radiation
Bucky Tray - Answer✔a device that contains a moving grid
Caliper - Answer✔a tool used for body part measurement
Cardinal Principles of Radiation Protection - Answer✔The methods used to protect operators
from unnecessary radiation exposure; time, distance and shielding
Cassette - Answer✔A rigid holder that contains the film and screens
Cathode - Answer✔negative side of the x-ray tube, contains the filament and the focusing cup
Central Ray - Answer✔Center of the primary x-ray beam that interacts with the image receptor
Characteristic Radiation - Answer✔One of two types of x-ray productions. created when an
electron enters the tungsten anode of the x-ray tube and knocks out a K-shell electron. This
interaction produces an x-ray photon
Coherent Scattering - Answer✔Scattering of x-rays with no loss of energy; also called classical
scattering
Collimation - Answer✔Restriction of the useful x-ray beam to reduce patient dose and improve
image contrast
Collimator - Answer✔boxlike device attached under the tube housing which allows the x-ray
operator to vary the beam size and shape
Compensating Filter - Answer✔Material Inserted between an x-ray source and a patient to
shape the intensity of the x-ray beam
Compton Scattering - Answer✔Interaction between an x-ray and a loosely bound outer-shell
electron that results in ionization and x-ray scattering
2|Page
