RADT 1200 TEST 1 EXAM QUESTIONS
WITH 100% CORRECT ANSWERS
LATEST VERSION 2025/2026.
What is radiation - ANS transfer of kinetic energy, or energy of motion, from one area to
another
what are ions - ANS altered atoms or molecules comprising particles -give charge
What is ionizing radiation? - ANS radiation is applied to the object or person and electrons
are ejected
The goal of modern radiation protection programs is to protect persons from both? -
ANS short term and long term radiation effects
radiation protection - ANS effective measures employed by radiation workers to safeguard
pts., personnel, and the general public from unnecessary exposure to ionizing radiation
3 main types of quantities for measuring radiation: - ANS 1.exposure
2.absorbed dose
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, 3.effective dose
exposure - ANS amount of ionization produced in air -measured with coulombs/kilogram
(C/kg)
absorbed dose - ANS amount of energy that is deposited in a material per unit mass of
material -measured in milligray (mGy)
effective dose - ANS measure of general harm in humans -takes in account amount of
absorbed dose received by a person -measured in millisievert (mSv)
biologic effects - ANS damage due to exposure to radiation
benefit vs risk - ANS radiation exposure should always be kept @ lowest possible level, but
diagnostic radiation may be necessary to diagnose problem -benefits must FAR outweigh the
risks
diagnostic efficacy - ANS degree to which diagnostic study accurately reveals presence or
absence of disease in pt.
Achievement of diagnostic efficacy - ANS 1. imaging procedure is ordered by doctor
2. minimal radiation exposure if possible
3. optimal images are produced
4. presence or absence of disease revealed
5. diagnostic efficacy
T or F- the referring physician must accept responsibility for protecting the patient from
nonuseful radiation exposure - ANS true
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
WITH 100% CORRECT ANSWERS
LATEST VERSION 2025/2026.
What is radiation - ANS transfer of kinetic energy, or energy of motion, from one area to
another
what are ions - ANS altered atoms or molecules comprising particles -give charge
What is ionizing radiation? - ANS radiation is applied to the object or person and electrons
are ejected
The goal of modern radiation protection programs is to protect persons from both? -
ANS short term and long term radiation effects
radiation protection - ANS effective measures employed by radiation workers to safeguard
pts., personnel, and the general public from unnecessary exposure to ionizing radiation
3 main types of quantities for measuring radiation: - ANS 1.exposure
2.absorbed dose
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, 3.effective dose
exposure - ANS amount of ionization produced in air -measured with coulombs/kilogram
(C/kg)
absorbed dose - ANS amount of energy that is deposited in a material per unit mass of
material -measured in milligray (mGy)
effective dose - ANS measure of general harm in humans -takes in account amount of
absorbed dose received by a person -measured in millisievert (mSv)
biologic effects - ANS damage due to exposure to radiation
benefit vs risk - ANS radiation exposure should always be kept @ lowest possible level, but
diagnostic radiation may be necessary to diagnose problem -benefits must FAR outweigh the
risks
diagnostic efficacy - ANS degree to which diagnostic study accurately reveals presence or
absence of disease in pt.
Achievement of diagnostic efficacy - ANS 1. imaging procedure is ordered by doctor
2. minimal radiation exposure if possible
3. optimal images are produced
4. presence or absence of disease revealed
5. diagnostic efficacy
T or F- the referring physician must accept responsibility for protecting the patient from
nonuseful radiation exposure - ANS true
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
