Arrt test prep, limited x-ray core question and answer rated a+ 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
, Radiographing lumbar vertebrae of a geriatric patient, what technique
change could be made to reduce patient exposure but maintain significant
density? - correct answer increase kvp by 15% with a 50% reduction in
mas
What should be considered when using aec? - correct answer proper
selection of ionization chamber(s)
Precise positioning over desired chambers
Not proper selection time
If using automatic exposure control (aec) device to make an exposure,
what would be adjusted to ensure proper optical density from pt to pt? -
correct answer set field detector's (chambers)
Set density compensation (+1, +2...)
Not set time!
Where should ionization chambers be located if it is to be used as an
efficient automatic exposure - correct answer between the patient and
the image receptor
Underexposed radiograph produced by aec device might result from? -
correct answer having insufficient backup time set for a very large patient
Appearance of grid lines on radiograph with the table bucky in use
indicates? - correct answer exposure time too short
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
, Radiographing lumbar vertebrae of a geriatric patient, what technique
change could be made to reduce patient exposure but maintain significant
density? - correct answer increase kvp by 15% with a 50% reduction in
mas
What should be considered when using aec? - correct answer proper
selection of ionization chamber(s)
Precise positioning over desired chambers
Not proper selection time
If using automatic exposure control (aec) device to make an exposure,
what would be adjusted to ensure proper optical density from pt to pt? -
correct answer set field detector's (chambers)
Set density compensation (+1, +2...)
Not set time!
Where should ionization chambers be located if it is to be used as an
efficient automatic exposure - correct answer between the patient and
the image receptor
Underexposed radiograph produced by aec device might result from? -
correct answer having insufficient backup time set for a very large patient
Appearance of grid lines on radiograph with the table bucky in use
indicates? - correct answer exposure time too short
