Safety (Radiation Physics and
Radiobiology) for ARRT Boards Exam
Questions and Answers 100% Pass
x-ray production characteristics - ✔✔source of free electrons, acceleration of electrons,
focusing of electrons, deceleration of electrons
x-ray production - ✔✔occurs when current inside the xray tube flows from the cathode
and is suddenly stopped at the anode
bremsstrahlung - ✔✔a projectile electron misses outer shell electrons in the target and
moves in close to the nucleus (braking)
characteristic - ✔✔a projectile electron collides with an inner shell electron of a target
atom and creates a hole. Outer shell electron falls into space.
characteristic x-rays are produced at kVp levels greater than? - ✔✔70
frequency - ✔✔number of wavelengths passing a given point per unit time; measured
in hertz Hz
wavelength - ✔✔distance between successive crests of wave
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, quality - ✔✔kVp (strength of x-ray)
quantity - ✔✔mA (amount of x-ray)
primary radiation - ✔✔radiation exiting the x-ray tube
remnant(exit) - ✔✔x-rays that emerge from the patient and strike the image receptor
inverse square law - ✔✔law that governs the intensity of x radiation; states that
intensity of the xray beam is inversely proportional to the square of the distance
between the source of the x-rays and the object
Fundamental Properties - ✔✔ROENTGEN RAYS
Compton effect - ✔✔incoming xray photon strikes loosely bound outer shell electron,
photon transfers part of energy to electron, electron removed from orbit, able to ionize
other atoms, photon has less energy than before
ejected electron in Compton is called? - ✔✔recoil electron
Compton usually results in what kind of dose - ✔✔occupational
photoelectric absorption - ✔✔photon strikes inner shell electron and is absorbed, energy
is transferred to electron, hole in k shell filled by outer electrons
ejected electron in photoelectric absorption is called - ✔✔photoelectron
photoelectric absorption results in increased dose to who? - ✔✔patient
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Radiobiology) for ARRT Boards Exam
Questions and Answers 100% Pass
x-ray production characteristics - ✔✔source of free electrons, acceleration of electrons,
focusing of electrons, deceleration of electrons
x-ray production - ✔✔occurs when current inside the xray tube flows from the cathode
and is suddenly stopped at the anode
bremsstrahlung - ✔✔a projectile electron misses outer shell electrons in the target and
moves in close to the nucleus (braking)
characteristic - ✔✔a projectile electron collides with an inner shell electron of a target
atom and creates a hole. Outer shell electron falls into space.
characteristic x-rays are produced at kVp levels greater than? - ✔✔70
frequency - ✔✔number of wavelengths passing a given point per unit time; measured
in hertz Hz
wavelength - ✔✔distance between successive crests of wave
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, quality - ✔✔kVp (strength of x-ray)
quantity - ✔✔mA (amount of x-ray)
primary radiation - ✔✔radiation exiting the x-ray tube
remnant(exit) - ✔✔x-rays that emerge from the patient and strike the image receptor
inverse square law - ✔✔law that governs the intensity of x radiation; states that
intensity of the xray beam is inversely proportional to the square of the distance
between the source of the x-rays and the object
Fundamental Properties - ✔✔ROENTGEN RAYS
Compton effect - ✔✔incoming xray photon strikes loosely bound outer shell electron,
photon transfers part of energy to electron, electron removed from orbit, able to ionize
other atoms, photon has less energy than before
ejected electron in Compton is called? - ✔✔recoil electron
Compton usually results in what kind of dose - ✔✔occupational
photoelectric absorption - ✔✔photon strikes inner shell electron and is absorbed, energy
is transferred to electron, hole in k shell filled by outer electrons
ejected electron in photoelectric absorption is called - ✔✔photoelectron
photoelectric absorption results in increased dose to who? - ✔✔patient
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