LMRT Core Review QUESTIONS WITH CORRECT!! ANSWERS 2024/25 UPDATE
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Course
LMRT
Institution
LMRT
LMRT core review syudy guide covers topics such as restricting the X-ray beam to the clinical area of interest, priming, beam quality, understanding the glass envelope and rotor inside the X-ray tube, the autotransformer and timer circuit, and the fundamental interactions that produce X-rays (chara...
LMRT Core Review QUESTIONS WITH
CORRECT!! ANSWERS 2024/25 UPDATE
restrict the XR beam to the clinical area of interest - correct answer As a
professional radiographer, the practice of ALARA requires you to
prime - correct answer The factors that affect XR emission under the direct
control of the radiographer are called_ factors
beam quality - correct answer Milliamperage-second (mAs) directly affects all of
the following EXCEPT
mA & filtration - correct answer The factors that directly affect XR quantity are
kVp & beam filtration - correct answer The factors that directly affect XR quality
are
6.3 x 10(18) - correct 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) - correct 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 - correct answer As the mA doubles, the number of electrons
flowing from cathode to anode
XR beam quantity - correct answer The product of tube current 7 exposure time
is equal to
change the mAs from 15-21 mAs - correct answer In order to increase
radiographic film density by 40% the radiographer would
directly proportional - correct answer The relationship between mAs & exposure
is
the reciprocity law - correct 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 - correct answer
Increasing the kVp for an exposure will
greater energy - correct answer Increasing the energy of an incident electron will
result in the production of an XR photon with
radiographic film density - correct answer Kilovoltage is the primary controlling
factor of
contrast - correct answer Adjustments in kVp should be used to control
radiographic
kVp - correct answer XR beam penetrability is primarily controlled by
400 mA, 200 ms, 40" SID - correct answer All factor remaining constant, which of
the following set of exposure conditions would yield an image with GREATEST
radiographic film density
1
, LMRT Core Review QUESTIONS WITH
CORRECT!! ANSWERS 2024/25 UPDATE
motion - correct answer The length of the exposure time (S) for a radiograph, is
used to primarily control
400 mA,0.110 sec, 80 kVp - correct answer A radiograph is taken 400 mA, 55 ms,
95 kVp. A second image could be taken to improve contrast at
attenuation - correct answer When an XR photon passes through matter, it
undergoes a process called
reduce in number - correct answer During the process of attenuation, XR
photons in the beam
lead (Z=82) - correct answer In which element are the inner-shell electrons more
tightly bound to the nucleus?
increase; decrease - correct answer As the electron shells move farther from the
nucleus, total electron energies_ and binding energies_.
scatter - correct answer When XR photons interacts w/matter & change
direction, the process is called
exists w/less energy - correct answer If a photon interacts w/matte & scatter,
the photon
inner - correct answer During photoelectric absorption, a/an_ shell electron is
ejected
photoelectron - correct answer During photoelectric absorption, the ejected
electron is called a/an
photon is released - correct answer When an electron from an outer shell fills a
vacancy in an inner shell
a characteristic photon - correct 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 - correct answer Secondary radiation energies are highest for which
element
loosely bound outer-shell - correct answer Compton scattering occurs when an
incident XR photon interacts w/a_ electron
recoil electron - correct answer The electron dislodged during Compton
scattering is called the
scattered photon - correct answer The photon that exits the atom after a
Compton scattering is called the Compton
recoil electron & the scattered photon - correct answer During Compton
scattering, the incident photon energy is divided between the
2
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