ARRT Test Prep Question and answers already correct 2023
Which of the following xray interactions with matter is primarily responsible
for contrast? - correct answer Photoelectric effect
Radiation produces at very discrete energies of approx 69 kiloelectron colts
(kev) when electrons interact with the K shell of the tungsten target atom is
called? - correct answer Characteristic Radiation
Pair-Production affects what portion of the cell? - correct answer
Nucleus. It does NOT cause ionization.
What type of radiation would produce the greatest amount of biological
damage in human tissue? - correct answer High LET's
What is the active component of the TLD? - correct answer Lithium
Fluoride
What is used in input phosphors? - correct answer Cesium Iodide
What is used in output phosphors? - correct answer Zinc Cadmium
Sulfide
What must be done to Xray film to make it compatible to rare earth
phosphors? - correct answer Add light absorbing dye in the x-ray film
emulsion
About what percentage of radiographic density is due to light emitted by an
intensifying screen phosphor? - correct answer 95-98%
,What occurs when exit radiation interacts with a Photo-Stimulable imaging
plate? - correct answer Energy Absorption
What is used in scintillation gamma cameras in nuclear medicine/CT? -
correct answer Sodium Iodide
What color of light emitted by lanthanum oxy-bromide rare earth crystals in
the intensifying screen? - correct answer Blue
Maximum # of electron that may be found in the L-Shell of an atom? -
correct answer 8
What is the most radiosensitive part of any human cell? - correct answer
Chromosome
DNA
Nucleus
What is arguably the MOST radiosensitive cell in the human body? -
correct answer Mature Lymphocyte
Example of Radiosensitive stem cells? - correct answer Neuroblasts
Spermatogonia
Human tissue considered to be the most radio-resistant? - correct answer
Erythrocyte
What is a Erythrocyte? - correct answer End cells w/ no nucleus
, Like mature nerve cells, are practically immune from radiation and have
about a 4 month life span
Example of Deterministic Effect? - correct answer Cataracto-genesis
Examples of Deterministic or Non-Stochastic associated with a threshold
dose? - correct answer Cataracts (2 grey - 200 Rad)
Examples of Stochastic, Non-Deterministic, Non threshold dose? - correct
answer Leukemia
Thyroid Cancer
Genetic Effects
Whole body doses only need...? - correct answer Very low doses for
cancer & genetic effects.
What is a cutie pie? - correct answer Radiation survey monitor or it can
be a hot personnel monitoring device.
Reduction in resolution often seen with the use of higher tube currents in a
single focus tube is a phenomenon called? - correct answer Blooming
What type of exposure factors provide the least patient exposure? - correct
answer Lowest kvp and lowest mas would cause the lowest patient dose.
What film change can be made to reduce the dose to the patient and
surrounding radiographer? - correct answer Use higher speed screen w/
a comparable change in mas
Which of the following xray interactions with matter is primarily responsible
for contrast? - correct answer Photoelectric effect
Radiation produces at very discrete energies of approx 69 kiloelectron colts
(kev) when electrons interact with the K shell of the tungsten target atom is
called? - correct answer Characteristic Radiation
Pair-Production affects what portion of the cell? - correct answer
Nucleus. It does NOT cause ionization.
What type of radiation would produce the greatest amount of biological
damage in human tissue? - correct answer High LET's
What is the active component of the TLD? - correct answer Lithium
Fluoride
What is used in input phosphors? - correct answer Cesium Iodide
What is used in output phosphors? - correct answer Zinc Cadmium
Sulfide
What must be done to Xray film to make it compatible to rare earth
phosphors? - correct answer Add light absorbing dye in the x-ray film
emulsion
About what percentage of radiographic density is due to light emitted by an
intensifying screen phosphor? - correct answer 95-98%
,What occurs when exit radiation interacts with a Photo-Stimulable imaging
plate? - correct answer Energy Absorption
What is used in scintillation gamma cameras in nuclear medicine/CT? -
correct answer Sodium Iodide
What color of light emitted by lanthanum oxy-bromide rare earth crystals in
the intensifying screen? - correct answer Blue
Maximum # of electron that may be found in the L-Shell of an atom? -
correct answer 8
What is the most radiosensitive part of any human cell? - correct answer
Chromosome
DNA
Nucleus
What is arguably the MOST radiosensitive cell in the human body? -
correct answer Mature Lymphocyte
Example of Radiosensitive stem cells? - correct answer Neuroblasts
Spermatogonia
Human tissue considered to be the most radio-resistant? - correct answer
Erythrocyte
What is a Erythrocyte? - correct answer End cells w/ no nucleus
, Like mature nerve cells, are practically immune from radiation and have
about a 4 month life span
Example of Deterministic Effect? - correct answer Cataracto-genesis
Examples of Deterministic or Non-Stochastic associated with a threshold
dose? - correct answer Cataracts (2 grey - 200 Rad)
Examples of Stochastic, Non-Deterministic, Non threshold dose? - correct
answer Leukemia
Thyroid Cancer
Genetic Effects
Whole body doses only need...? - correct answer Very low doses for
cancer & genetic effects.
What is a cutie pie? - correct answer Radiation survey monitor or it can
be a hot personnel monitoring device.
Reduction in resolution often seen with the use of higher tube currents in a
single focus tube is a phenomenon called? - correct answer Blooming
What type of exposure factors provide the least patient exposure? - correct
answer Lowest kvp and lowest mas would cause the lowest patient dose.
What film change can be made to reduce the dose to the patient and
surrounding radiographer? - correct answer Use higher speed screen w/
a comparable change in mas
