RS150 chapter 3 questions & answers
differential absorption - answer A process whereby some of the x-ray
beam is absorbed in the tissue & some passes through (transmits) the
anatomic part
true or false bone absorbs more x-rays then muscle - answer true
Beam attenuation - answer -as the primary beam passes through the
anatomic part it loses some of its energy (intensity)
-scattering and absortion occur
Absorption of x-rays - answer as the energy of the primary beam is
deposited within the atoms comprising the tissue some of the x-ray
photons are completely absorbed
Photoelectron - answer ~results in complete absorbtion
~this is due to it having enough energy to remove(eject) an inner
electron
~ atom is now ionized
~the vacancy in the electron if filled by an outer shell electron
~due to the difference in binding energy a secondary x-ray photon is
emitted
, true or false the incoming x-ray photon must be at least equal to the
binding energy of the inner shell electron for photoelectric effect to
occur - answer true
what happens to the primary beam as it passes through atomic part -
answer the beam quantity decreases
What is scattering? - answer some incoming electrons are not absorbed
but they lose energy and change directions during interaction
Compton effect - answer ~incoming photon loses some but not all of its
energy and then changes directions
~photon interacts with outer electrons knocking it out of orbit, the
ejected electron leave the atom with an energy equal to the excess
imparted by the photon, photon continues on an altered path, with
longer wavelength then before
probability of compton effect happening - answer depends on the
energy of the incoming photon doesnt depend on the atomic number
of the tissue
Probability of photoelectric effect occuring - answer depends on the
energy of the incoming x-ray photon and tissue atomic number
differential absorption - answer A process whereby some of the x-ray
beam is absorbed in the tissue & some passes through (transmits) the
anatomic part
true or false bone absorbs more x-rays then muscle - answer true
Beam attenuation - answer -as the primary beam passes through the
anatomic part it loses some of its energy (intensity)
-scattering and absortion occur
Absorption of x-rays - answer as the energy of the primary beam is
deposited within the atoms comprising the tissue some of the x-ray
photons are completely absorbed
Photoelectron - answer ~results in complete absorbtion
~this is due to it having enough energy to remove(eject) an inner
electron
~ atom is now ionized
~the vacancy in the electron if filled by an outer shell electron
~due to the difference in binding energy a secondary x-ray photon is
emitted
, true or false the incoming x-ray photon must be at least equal to the
binding energy of the inner shell electron for photoelectric effect to
occur - answer true
what happens to the primary beam as it passes through atomic part -
answer the beam quantity decreases
What is scattering? - answer some incoming electrons are not absorbed
but they lose energy and change directions during interaction
Compton effect - answer ~incoming photon loses some but not all of its
energy and then changes directions
~photon interacts with outer electrons knocking it out of orbit, the
ejected electron leave the atom with an energy equal to the excess
imparted by the photon, photon continues on an altered path, with
longer wavelength then before
probability of compton effect happening - answer depends on the
energy of the incoming photon doesnt depend on the atomic number
of the tissue
Probability of photoelectric effect occuring - answer depends on the
energy of the incoming x-ray photon and tissue atomic number
