Exam (elaborations)

LMRT Core Review

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Course
LMRT Core

Institution
LMRT Core

LMRT Core Review .15:1 - ANSWER.Which grids would most effectively reduce scatter? .256 - ANSWER.A pixel that has an 8-bit depth displays_ shades of gray .3 mm renal calculi (stone) - ANSWER.Which of the choices below would produce the highest spatial frequency & contrast? .3,145,728 ...

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Uploaded on February 15, 2025
Number of pages 8
Written in 2024/2025
Type Exam (elaborations)
Contains Questions & answers

lmrt core review

Institution LMRT Core
Course LMRT Core

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LMRT Core Review
.15:1 - ANSWER.Which grids would most effectively reduce scatter?

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.256 - ANSWER.A pixel that has an 8-bit depth displays_ shades of gray

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.3 mm renal calculi (stone) - ANSWER.Which of the choices below would produce the highest spatial
frequency & contrast?

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d
.3,145,728 - ANSWER.A matrix of size 2048 x 1536 would have_ pixels

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.35 keV - ANSWER.An XR exposure taken at 80 kVp has an average energy of
iO
ea

.4 - ANSWER.If the digital FOV is 1024 & the display matrix is 256, the pixel size would be

.400 mA, 200 ms, 40" SID - ANSWER.All factor remaining constant, which of the following set of
ob

exposure conditions would yield an image with GREATEST radiographic film density
Cr

.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
M

.6:1 - ANSWER.Which grid would have the greatest distance between lead strips?

.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?

, .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

.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

it h
.a grid is a series of lead strips that alternate w/radiopaque interspace strips - ANSWER.Which
statement about radiographic grids is incorrect?

.A loss of contrast - ANSWER.Grossly overexposed digital images will demonstrate

w
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.amorphous silicon - ANSWER.Indirect DR uses_ as the detector material
d
.An EI # increase from 1500-1800 - ANSWER.When changing exposure technique from 9 mAs to 18
mAs using computed radiography, the radiographer

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.annihilation reaction - ANSWER.In which process is matter converted back to energy?
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ea

.Apply a predetermined scale of contrast to the digital data set - ANSWER.The purpose of a LUT is to
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Cr

.attenuation - ANSWER.When an XR photon passes through matter, it undergoes a process called

.barium - ANSWER.Secondary radiation energies are highest for which element
M

.beam quality - ANSWER.Milliamperage-second (mAs) directly affects all of the following EXCEPT

.binary machine - ANSWER.Computers operate using a_ language

.bit - ANSWER.Each binary # is called a

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LMRT Core Review

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