1|Page
ARRT REGISTRY EXAM LATEST 2026-2027 ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (100%
VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
What is the term for the number of x-rays emitted per inner-shell
vacancy during the process of photoelectric absorption?
A. Characteristic absorption
B. Fluorescent yield
C. Modified pair production
D. Classical gain - ANSWER-b. Fluorescent yield
What is the effective atomic number of compact bone? -
ANSWER-13.8
Compton scattering is synonymous with:
A. Coherent scattering
B. Photoelectric absorption
C. Incoherent scattering
D. Photodisintegration - ANSWER-c. Incoherent scattering
,2|Page
Which of the following is not another term for coherent scattering?
A. Classical
B. Elastic
C. Unmodified
D. Characteristic - ANSWER-d. Characteristic
Which of the following is not a type of interaction between x-
radiation and biologic matter?
A. Compton scattering
B. Bremsstrahlung
C. Pair production
D. Photoelectric absorption - ANSWER-b. Bremsstrahlung
According to the NCRP Report #160,
A. Individual effective doses have nearly quadrupled since the
early 1980s.
B. Individual exposures have increased principally due to
increased utilization of digital imaging technologies.
,3|Page
C. The effective dose per individual in the United States primarily
increased because of increased fluoroscopic interventional
procedures and CT scans.
D. Individual exposures have decreased due to improved
technology and more discrete utilization. - ANSWER-c. The
effective dose per individual in the United States primarily
increased because of increased fluoroscopic interventional
procedures and CT scans.
How long does the prodromal stage of acute radiation syndrome
generally last?
A. A few hours to several days
B. Months
C. Less than an hour
D. Many years - ANSWER-a. A few hours to several days
What occurs as the number of photoelectric interactions
increase?
A. Absorbed dose increases
B. Potential for biologic damage increases
, 4|Page
C. Radiographic contrast changes
D. All of the above - ANSWER-d. All of the above
Alpha is what form of ionizing radiation? - ANSWER-particulate
What can happen when the metabolic activity of cells increases
as a result of irradiation?
A. Cell reproduction ceases
B. Cells reproduce more rapidly
C. Cells atrophy
D. Cell fluid viscosity decreases - ANSWER-b. Cells reproduce
more rapidly
In a linear or nonlinear threshold dose-response relationship,
which of the following is true of the biologic response to radiation?
A. It will occur at all doses
B. It may not occur at low doses
C. It will never occur
ARRT REGISTRY EXAM LATEST 2026-2027 ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (100%
VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
What is the term for the number of x-rays emitted per inner-shell
vacancy during the process of photoelectric absorption?
A. Characteristic absorption
B. Fluorescent yield
C. Modified pair production
D. Classical gain - ANSWER-b. Fluorescent yield
What is the effective atomic number of compact bone? -
ANSWER-13.8
Compton scattering is synonymous with:
A. Coherent scattering
B. Photoelectric absorption
C. Incoherent scattering
D. Photodisintegration - ANSWER-c. Incoherent scattering
,2|Page
Which of the following is not another term for coherent scattering?
A. Classical
B. Elastic
C. Unmodified
D. Characteristic - ANSWER-d. Characteristic
Which of the following is not a type of interaction between x-
radiation and biologic matter?
A. Compton scattering
B. Bremsstrahlung
C. Pair production
D. Photoelectric absorption - ANSWER-b. Bremsstrahlung
According to the NCRP Report #160,
A. Individual effective doses have nearly quadrupled since the
early 1980s.
B. Individual exposures have increased principally due to
increased utilization of digital imaging technologies.
,3|Page
C. The effective dose per individual in the United States primarily
increased because of increased fluoroscopic interventional
procedures and CT scans.
D. Individual exposures have decreased due to improved
technology and more discrete utilization. - ANSWER-c. The
effective dose per individual in the United States primarily
increased because of increased fluoroscopic interventional
procedures and CT scans.
How long does the prodromal stage of acute radiation syndrome
generally last?
A. A few hours to several days
B. Months
C. Less than an hour
D. Many years - ANSWER-a. A few hours to several days
What occurs as the number of photoelectric interactions
increase?
A. Absorbed dose increases
B. Potential for biologic damage increases
, 4|Page
C. Radiographic contrast changes
D. All of the above - ANSWER-d. All of the above
Alpha is what form of ionizing radiation? - ANSWER-particulate
What can happen when the metabolic activity of cells increases
as a result of irradiation?
A. Cell reproduction ceases
B. Cells reproduce more rapidly
C. Cells atrophy
D. Cell fluid viscosity decreases - ANSWER-b. Cells reproduce
more rapidly
In a linear or nonlinear threshold dose-response relationship,
which of the following is true of the biologic response to radiation?
A. It will occur at all doses
B. It may not occur at low doses
C. It will never occur
