LMRT Core Review Exam Questions and 100% Verified Correct Answers Updated Version Guaranteed 100%
- mm renal calculi (stone) - Ans Which of the choices below would produce the highest
spatial frequency & contrast?
3,145,728 - Ans A matrix of size 2048 x 1536 would have_ pixels
- - Ans If the digital FOV is 1024 & the display matrix is 256, the pixel size would be
6:1 - Ans Which grid would have the greatest distance between lead strips?
6.3 x 10(15) - Ans 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) - Ans If 1 coulomb is equal to 6.3 x 10(18) electron charges, how many electrons flow from cathode to anode 1 second
15:1 - Ans Which grids would most effectively reduce scatter?
35 keV - Ans An XR exposure taken at 80 kVp has an average energy of
256 - Ans A pixel that has an 8-bit depth displays_ shades of gray
400 mA, 200 ms, 40" SID - Ans All factor remaining constant, which of the following set of exposure conditions would yield an image with GREATEST radiographic film density
400 mA,0.110 sec, 80 kVp - Ans A radiograph is taken 400 mA, 55 ms, 95 kVp. A second image could be taken to improve contrast at
a characteristic photon - Ans During the photoelectric interaction, as an electron transfer from an outer shell to a vacant inner shell energy is released in the form of
a grid is a series of lead strips that alternate w/radiopaque interspace strips - Ans Which statement about radiographic grids is incorrect?
A loss of contrast - Ans Grossly overexposed digital images will demonstrate
amorphous silicon - Ans Indirect DR uses_ as the detector material
An EI # increase from 1500-1800 - Ans When changing exposure technique from 9 mAs to 18 mAs using computed radiography, the radiographer
annihilation reaction - Ans In which process is matter converted back to energy? 1 / 2
Apply a predetermined scale of contrast to the digital data set - Ans The purpose of a LUT is to
attenuation - Ans When an XR photon passes through matter, it undergoes a process called
barium - Ans Secondary radiation energies are highest for which element
beam quality - Ans Milliamperage-second (mAs) directly affects all of the following
EXCEPT
binary machine - Ans Computers operate using a_ language
bit - Ans Each binary # is called a
Bits/pixel - Ans All of the following impact digital image spatial resolution EXCEPT
blur out the radiopaque strips - Ans the purpose of moving the grid during the radiographic exposure is to
brightness - Ans The window level controls
byte - Ans An eight-bit word is called a
cause the electrons to travel faster from cathode to anode - Ans Increasing the kVp for an exposure will
change the mAs from 15-21 mAs - Ans In order to increase radiographic film density by 40% the radiographer would
Compares entrance dose to the detector to a reference industry-standard target dose - Ans The deviation index (DI)
Compton - Ans The atomic interaction that produces scatter radiation is
Compton Scattering - Ans In the human body,_ is the predominant interaction through most of the diagnostic XR range
contrast - Ans Adjustments in kVp should be used to control radiographic
directly proportional - Ans The relationship between mAs & exposure is
electronic address - Ans Each pixel in a digital display matrix is located according to its
Electrons "holes" in Europium - Ans In the technology of CR, the latent image is actually
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