Test Bank For Radiation Protection in Medical
Radiography | Questions and Answers | 2026
Update | Complete Solution Guide
• ALARA -✓✓as low as reasonably achievable
-synonymous w/ the term optimization for radiation protection (ORP)
• alert levels -✓✓where pt dose is predicted to or has actually substantially exceeded
present dose levels. Staff radiologist is notified.
• Alliance for Radiation Safety in Pediatric Imaging -✓✓A partnership of medical
societies, founded in 2007, whose overall common purpose is to reduce dose for
pediatric patients.
• background equivalent radiation time (BERT) -✓✓Method to compare the amount of
radiation received from a radiologic procedure with natural background radiation
received over a specified period of time such as days, weeks, months, or years.
-recommended by US National Council on Radiation Protection & Measurements
(NCRP)
-based on annual US population exposure of approx. 3 mSv per year
• biologic effects -✓✓living tissue of animals and humans can be damaged by exposure
to ionizing radiation
• coulomb per kilogram (C/kg) -✓✓SI unit of radiation exposure
-milliroentgens (mR)
• diagnostic efficacy -✓✓degree to which the diagnostic study accurately reveals the
presence or absence of disease in the pt while adhering to radiation safety guidelines
• effective dose -✓✓attempt to provide a quantity that is a measure of general harm in
humans
-amount of absorbed dose rcv'd by humans
-exact type of radiation
-specific organs or organ systems irradiated
-intended to be best overall measure of biologic effects of ionizing radiation
-specified in millisievert (mSv)
• exposure -✓✓amount of ionization produced in air when ionizing radiation is present
-coulomb per kilogram (C/kg) -> mR
, • gray (Gy) -✓✓Unit in the International System used to measure the amount of energy
absorbed in any medium; 1 Gy = 100 radiation absorbed doses
• Image Gently Campaign -✓✓A campaign launched in 2008 to raise awareness about
methods to reduce CT radiation dose during pediatric medical imaging exams.
- includes establishment of Image Gently website
• Image Wisely Campaign -✓✓objectives of lowering amount of radiation used in
medically necessary imaging studies & eliminating unnecessary procedures
- created by collaboration btwn The Joint Task Force & American Association of
Physicists in Medicine (AAPM) and the ASRT
- offers resources & info as guidance to radiologists, medical physicists, other imaging
practitioners & pts.
• ionizing radiation -✓✓radiation w/ enough energy to free electrons from atoms forming
ions, may cause cancer (ex. gamma, X-rays, UV).
• milligray (mGy) -✓✓a subunit of a gray (Gy) equal to one one-thousandth of a gray
(1/1000 Gy)
• milliroentgens (mR) -✓✓subunit of roentgen, a nonmetric unit likewise used for
measuring ionizing capability of radiation
-equal to 1/1000 of a roentgen
• millisievert (mSv) -✓✓A subunit of the sievert equal to 1/1000 of a sievert
• occupational and nonoccupational doses -✓✓the radiation dose that the worker and
the patient receive
-must be ensured by radiation professionals to remain well below maximum allowable
levels
• optimization for radiation protection (ORP) -✓✓Synonymous with ALARA. The concept
of keeping radiation doses as low as reasonably achievable.
• radiation -✓✓the transfer of kinetic energy, or energy of motion, from one location to
another
• radiation protection -✓✓effective measures employed by radiation workers to
safeguard patients, personnel, and the general public from unnecessary exposure to
ionizing radiation
• reference values -✓✓values usually based upon large-scale surveys of actual
measurements of x-ray machines in hospitals
Radiography | Questions and Answers | 2026
Update | Complete Solution Guide
• ALARA -✓✓as low as reasonably achievable
-synonymous w/ the term optimization for radiation protection (ORP)
• alert levels -✓✓where pt dose is predicted to or has actually substantially exceeded
present dose levels. Staff radiologist is notified.
• Alliance for Radiation Safety in Pediatric Imaging -✓✓A partnership of medical
societies, founded in 2007, whose overall common purpose is to reduce dose for
pediatric patients.
• background equivalent radiation time (BERT) -✓✓Method to compare the amount of
radiation received from a radiologic procedure with natural background radiation
received over a specified period of time such as days, weeks, months, or years.
-recommended by US National Council on Radiation Protection & Measurements
(NCRP)
-based on annual US population exposure of approx. 3 mSv per year
• biologic effects -✓✓living tissue of animals and humans can be damaged by exposure
to ionizing radiation
• coulomb per kilogram (C/kg) -✓✓SI unit of radiation exposure
-milliroentgens (mR)
• diagnostic efficacy -✓✓degree to which the diagnostic study accurately reveals the
presence or absence of disease in the pt while adhering to radiation safety guidelines
• effective dose -✓✓attempt to provide a quantity that is a measure of general harm in
humans
-amount of absorbed dose rcv'd by humans
-exact type of radiation
-specific organs or organ systems irradiated
-intended to be best overall measure of biologic effects of ionizing radiation
-specified in millisievert (mSv)
• exposure -✓✓amount of ionization produced in air when ionizing radiation is present
-coulomb per kilogram (C/kg) -> mR
, • gray (Gy) -✓✓Unit in the International System used to measure the amount of energy
absorbed in any medium; 1 Gy = 100 radiation absorbed doses
• Image Gently Campaign -✓✓A campaign launched in 2008 to raise awareness about
methods to reduce CT radiation dose during pediatric medical imaging exams.
- includes establishment of Image Gently website
• Image Wisely Campaign -✓✓objectives of lowering amount of radiation used in
medically necessary imaging studies & eliminating unnecessary procedures
- created by collaboration btwn The Joint Task Force & American Association of
Physicists in Medicine (AAPM) and the ASRT
- offers resources & info as guidance to radiologists, medical physicists, other imaging
practitioners & pts.
• ionizing radiation -✓✓radiation w/ enough energy to free electrons from atoms forming
ions, may cause cancer (ex. gamma, X-rays, UV).
• milligray (mGy) -✓✓a subunit of a gray (Gy) equal to one one-thousandth of a gray
(1/1000 Gy)
• milliroentgens (mR) -✓✓subunit of roentgen, a nonmetric unit likewise used for
measuring ionizing capability of radiation
-equal to 1/1000 of a roentgen
• millisievert (mSv) -✓✓A subunit of the sievert equal to 1/1000 of a sievert
• occupational and nonoccupational doses -✓✓the radiation dose that the worker and
the patient receive
-must be ensured by radiation professionals to remain well below maximum allowable
levels
• optimization for radiation protection (ORP) -✓✓Synonymous with ALARA. The concept
of keeping radiation doses as low as reasonably achievable.
• radiation -✓✓the transfer of kinetic energy, or energy of motion, from one location to
another
• radiation protection -✓✓effective measures employed by radiation workers to
safeguard patients, personnel, and the general public from unnecessary exposure to
ionizing radiation
• reference values -✓✓values usually based upon large-scale surveys of actual
measurements of x-ray machines in hospitals
