ARRT REGISTRY SAFETY || WITH COMPLETE
SOLUTION.
air kerma correct answers radiation delivered to a certain point
1 Gy = correct answers 100 rad
KERMA is an acronym for ... correct answers kinetic energy released in matter
what unit of measure is sometimes used instead of air kerma? correct answers
coulombs/kilogram
LET correct answers amount of energy transferred by ionizing radiation per unit length of track
what type of radiation has high LET? correct answers alpha particle
what types of radiation have low LET? correct answers x rays and gamma rays
unit of measure in tissue correct answers Sievert
what is radioactivity? correct answers The process in which some substances spontaneously emit
radiation
Unit of radioactivity correct answers Becquerel
measures the number of atoms dying per second
,ionization correct answers any process that results in the formation of an ion
results of ionization in human cells correct answers unstable atoms
free electrons
production of low energy X-rays
formation of new molecules
cell damage
what are the 2 general types of radiation damage? correct answers somatic
genetic
somatic damage correct answers damage to exposed individual
genetic damage correct answers damage to the genetic code of the germ cell
annual background radiation dose correct answers 6.25 mSv annually
natural background radiation correct answers 3.0 mSv annually
48% of total radiation dose
medical background radiation correct answers 3.2 mSv
50% of total dose
primary radiation correct answers exits xray tube
exit radiation correct answers x-rays that emerge from the patient and strike the image receptor
,attenuation correct answers absorption and scatter (loss of intensity) of the X-ray beam as it
passes through the patient
heterogenous beam correct answers xray beam that contains photons of many different energies
photoelectric interaction correct answers incoming xray photon strikes a K-shell electron
energy of X-ray photon is transferred to electron
electron is ejected from the K shell and is now called a photoelectron
xray photon emits all energy and no longer exists
photon is completely absorbed
increased dose to patient
produces image contrast
Compton interaction correct answers incoming X-ray photon strikes a loosely bound outer shell
electron
photon scatters in another direction
what type of energy is produced by coherent scatter? correct answers low energy photons
pair production correct answers photon energies greater than 1.02 million electron volts
photodisintegration correct answers Does not occur in diagnostic radiography
NCRP correct answers formulates and publishes scientifically researched recommendations on
radiation protection and measurements in the US
linear nonthreshold correct answers No safe level of radiation,
Any radiation dose may cause a biologic response,
, Severity of biologic response is directly related to dose
linear threshold correct answers a dose requires a threshold greater than zero to produce a
response
nonlinear threshold correct answers at lower doses of radiation, no response is expected
nonlinear nonthreshold correct answers No safe level of radiation,
Any radiation dose can cause a biologic response,
Biologic response is not directly related to dose,
"Anything goes"
stochastic effects correct answers probability is proportional to dose
deterministic effects correct answers severity depends on dose
what is the annual occupational dose limit? correct answers 50 mSv annually
what is the occupational dose limit for the lens of the eye? correct answers 150 mSv
what is the annual occupational dose limit skin, hands, feet? correct answers 500 mSv
what formula is used to find the cumulative effective dose limit? correct answers age x 10 mSv
what is the effective annual dose limit for students? correct answers 1 mSv
what is the annual dose limit for the general public? correct answers 1 mSv
SOLUTION.
air kerma correct answers radiation delivered to a certain point
1 Gy = correct answers 100 rad
KERMA is an acronym for ... correct answers kinetic energy released in matter
what unit of measure is sometimes used instead of air kerma? correct answers
coulombs/kilogram
LET correct answers amount of energy transferred by ionizing radiation per unit length of track
what type of radiation has high LET? correct answers alpha particle
what types of radiation have low LET? correct answers x rays and gamma rays
unit of measure in tissue correct answers Sievert
what is radioactivity? correct answers The process in which some substances spontaneously emit
radiation
Unit of radioactivity correct answers Becquerel
measures the number of atoms dying per second
,ionization correct answers any process that results in the formation of an ion
results of ionization in human cells correct answers unstable atoms
free electrons
production of low energy X-rays
formation of new molecules
cell damage
what are the 2 general types of radiation damage? correct answers somatic
genetic
somatic damage correct answers damage to exposed individual
genetic damage correct answers damage to the genetic code of the germ cell
annual background radiation dose correct answers 6.25 mSv annually
natural background radiation correct answers 3.0 mSv annually
48% of total radiation dose
medical background radiation correct answers 3.2 mSv
50% of total dose
primary radiation correct answers exits xray tube
exit radiation correct answers x-rays that emerge from the patient and strike the image receptor
,attenuation correct answers absorption and scatter (loss of intensity) of the X-ray beam as it
passes through the patient
heterogenous beam correct answers xray beam that contains photons of many different energies
photoelectric interaction correct answers incoming xray photon strikes a K-shell electron
energy of X-ray photon is transferred to electron
electron is ejected from the K shell and is now called a photoelectron
xray photon emits all energy and no longer exists
photon is completely absorbed
increased dose to patient
produces image contrast
Compton interaction correct answers incoming X-ray photon strikes a loosely bound outer shell
electron
photon scatters in another direction
what type of energy is produced by coherent scatter? correct answers low energy photons
pair production correct answers photon energies greater than 1.02 million electron volts
photodisintegration correct answers Does not occur in diagnostic radiography
NCRP correct answers formulates and publishes scientifically researched recommendations on
radiation protection and measurements in the US
linear nonthreshold correct answers No safe level of radiation,
Any radiation dose may cause a biologic response,
, Severity of biologic response is directly related to dose
linear threshold correct answers a dose requires a threshold greater than zero to produce a
response
nonlinear threshold correct answers at lower doses of radiation, no response is expected
nonlinear nonthreshold correct answers No safe level of radiation,
Any radiation dose can cause a biologic response,
Biologic response is not directly related to dose,
"Anything goes"
stochastic effects correct answers probability is proportional to dose
deterministic effects correct answers severity depends on dose
what is the annual occupational dose limit? correct answers 50 mSv annually
what is the occupational dose limit for the lens of the eye? correct answers 150 mSv
what is the annual occupational dose limit skin, hands, feet? correct answers 500 mSv
what formula is used to find the cumulative effective dose limit? correct answers age x 10 mSv
what is the effective annual dose limit for students? correct answers 1 mSv
what is the annual dose limit for the general public? correct answers 1 mSv
