LMRT Core Review CORRECT 100%
restrict the XR beam to the clinical area of interest - ANSWER As a professional
radiographer, the practice of ALARA requires you to
prime - ANSWER The factors that affect XR emission under the direct control of the
radiographer are called_ factors
beam quality - ANSWER Milliamperage-second (mAs) directly affects all of the following
EXCEPT
mA & filtration - ANSWER The factors that directly affect XR quantity are
kVp & beam filtration - ANSWER The factors that directly affect XR quality are
6.3 x 10(18) - ANSWER If 1 coulomb is equal to 6.3 x 10(18) electron charges, how
many electrons flow from cathode to anode 1 second
6.3 x 10(15) - ANSWER If 1 ampere equals a flow of 6.3 x 10(18) electrons per second,
how many electrons flow from cathode to anode in 1 milliampere?
increase 2-fold - ANSWER As the mA doubles, the number of electrons flowing from
cathode to anode
XR beam quantity - ANSWER The product of tube current 7 exposure time is equal to
change the mAs from 15-21 mAs - ANSWER In order to increase radiographic film
density by 40% the radiographer would
directly proportional - ANSWER The relationship between mAs & exposure is
the reciprocity law - ANSWER The reaction of a photographic film to light is equal to the
product of the intensity of the light and the duration of the light exposure.
cause the electrons to travel faster from cathode to anode - ANSWER Increasing the
kVp for an exposure will
greater energy - ANSWER Increasing the energy of an incident electron will result in the
production of an XR photon with
radiographic film density - ANSWER Kilovoltage is the primary controlling factor of
contrast - ANSWER Adjustments in kVp should be used to control radiographic
kVp - ANSWER XR beam penetrability is primarily controlled by
, 400 mA, 200 ms, 40" SID - ANSWER All factor remaining constant, which of the
following set of exposure conditions would yield an image with GREATEST radiographic
film density
motion - ANSWER The length of the exposure time (S) for a radiograph, is used to
primarily control
400 mA,0.110 sec, 80 kVp - ANSWER A radiograph is taken 400 mA, 55 ms, 95 kVp. A
second image could be taken to improve contrast at
attenuation - ANSWER When an XR photon passes through matter, it undergoes a
process called
reduce in number - ANSWER During the process of attenuation, XR photons in the
beam
lead (Z=82) - ANSWER In which element are the inner-shell electrons more tightly
bound to the nucleus?
increase; decrease - ANSWER As the electron shells move farther from the nucleus,
total electron energies_ and binding energies_.
scatter - ANSWER When XR photons interacts w/matter & change direction, the
process is called
exists w/less energy - ANSWER If a photon interacts w/matte & scatter, the photon
inner - ANSWER During photoelectric absorption, a/an_ shell electron is ejected
photoelectron - ANSWER During photoelectric absorption, the ejected electron is called
a/an
photon is released - ANSWER When an electron from an outer shell fills a vacancy in
an inner shell
a characteristic photon - ANSWER During the photoelectric interaction, as an electron
transfer from an outer shell to a vacant inner shell energy is released in the form of
barium - ANSWER Secondary radiation energies are highest for which element
loosely bound outer-shell - ANSWER Compton scattering occurs when an incident XR
photon interacts w/a_ electron
recoil electron - ANSWER The electron dislodged during Compton scattering is called
the
restrict the XR beam to the clinical area of interest - ANSWER As a professional
radiographer, the practice of ALARA requires you to
prime - ANSWER The factors that affect XR emission under the direct control of the
radiographer are called_ factors
beam quality - ANSWER Milliamperage-second (mAs) directly affects all of the following
EXCEPT
mA & filtration - ANSWER The factors that directly affect XR quantity are
kVp & beam filtration - ANSWER The factors that directly affect XR quality are
6.3 x 10(18) - ANSWER If 1 coulomb is equal to 6.3 x 10(18) electron charges, how
many electrons flow from cathode to anode 1 second
6.3 x 10(15) - ANSWER If 1 ampere equals a flow of 6.3 x 10(18) electrons per second,
how many electrons flow from cathode to anode in 1 milliampere?
increase 2-fold - ANSWER As the mA doubles, the number of electrons flowing from
cathode to anode
XR beam quantity - ANSWER The product of tube current 7 exposure time is equal to
change the mAs from 15-21 mAs - ANSWER In order to increase radiographic film
density by 40% the radiographer would
directly proportional - ANSWER The relationship between mAs & exposure is
the reciprocity law - ANSWER The reaction of a photographic film to light is equal to the
product of the intensity of the light and the duration of the light exposure.
cause the electrons to travel faster from cathode to anode - ANSWER Increasing the
kVp for an exposure will
greater energy - ANSWER Increasing the energy of an incident electron will result in the
production of an XR photon with
radiographic film density - ANSWER Kilovoltage is the primary controlling factor of
contrast - ANSWER Adjustments in kVp should be used to control radiographic
kVp - ANSWER XR beam penetrability is primarily controlled by
, 400 mA, 200 ms, 40" SID - ANSWER All factor remaining constant, which of the
following set of exposure conditions would yield an image with GREATEST radiographic
film density
motion - ANSWER The length of the exposure time (S) for a radiograph, is used to
primarily control
400 mA,0.110 sec, 80 kVp - ANSWER A radiograph is taken 400 mA, 55 ms, 95 kVp. A
second image could be taken to improve contrast at
attenuation - ANSWER When an XR photon passes through matter, it undergoes a
process called
reduce in number - ANSWER During the process of attenuation, XR photons in the
beam
lead (Z=82) - ANSWER In which element are the inner-shell electrons more tightly
bound to the nucleus?
increase; decrease - ANSWER As the electron shells move farther from the nucleus,
total electron energies_ and binding energies_.
scatter - ANSWER When XR photons interacts w/matter & change direction, the
process is called
exists w/less energy - ANSWER If a photon interacts w/matte & scatter, the photon
inner - ANSWER During photoelectric absorption, a/an_ shell electron is ejected
photoelectron - ANSWER During photoelectric absorption, the ejected electron is called
a/an
photon is released - ANSWER When an electron from an outer shell fills a vacancy in
an inner shell
a characteristic photon - ANSWER During the photoelectric interaction, as an electron
transfer from an outer shell to a vacant inner shell energy is released in the form of
barium - ANSWER Secondary radiation energies are highest for which element
loosely bound outer-shell - ANSWER Compton scattering occurs when an incident XR
photon interacts w/a_ electron
recoil electron - ANSWER The electron dislodged during Compton scattering is called
the
