Lmrt state review QUESTIONS WITH COMPLETE SOLUTION 2024/25 UPDATE
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Course
LMRT
Institution
LMRT
indicator number - CORRECT ANSWER how much radiation was absorbed into the phosphors
image stitching - CORRECT ANSWER stitching together multiple images - useful for scoliosis studies of the spine, long bone studies or angiographic imaging of peripheral vasculature. - to view as a single image.
i...
Lmrt state review QUESTIONS WITH
COMPLETE SOLUTION 2024/25 UPDATE
indicator number - CORRECT ANSWER how much radiation was absorbed into the
phosphors
image stitching - CORRECT ANSWER stitching together multiple images - useful
for scoliosis studies of the spine, long bone studies or angiographic imaging of
peripheral vasculature. - to view as a single image.
image annotation - CORRECT ANSWER allow the technologist to inset preset text
or manual text on the image
contrast resolution (digital) - CORRECT ANSWER Ability to distinguish anatomic
structures having similar subject contrast
spatial resolution - CORRECT ANSWER Refers to the amount of detail present in
any image.Phosphor layer thickness and pixel size determines resolution in CR.
pixel - CORRECT ANSWER A single square within a matrix
matrix - CORRECT ANSWER a series of very small boxes that form a digital image
direct conversion - CORRECT ANSWER one step process in DR where flat panel
detectors convert the x-ray energy directly to an electric signal using an
amorphous selenium detector for immediate viewing
charged coupled device - CORRECT ANSWER component which light enters and is
converted into video or electronic signal
thin film transistor - CORRECT ANSWER used to read charges collected during an
exposure
photodiode - CORRECT ANSWER A silicon solid state device sensitive to light.
Converts light into an electrical signal.
scintillator - CORRECT ANSWER Amorphous silicon requires a such as
cesium iodide or a rare earth intensifying screen composed of gadolinum and
lanthanum with oxysulfides. This also converts x-rays to visible light.
flat panel detector - CORRECT ANSWER a type of digital detector employing
amorphous silicon or selenium detector material, bonded with thin-film transistor
technology for digital image creation and amplification
density - CORRECT ANSWER It is the degree of blackening of a radiograph
resulting from radiation exposure and processing and one of the two
photographic properties that comprise visibility of detail.
automatic exposure controll - CORRECT ANSWER a device that measures the
quantity of radiation that reaches the image receptor and automatically
terminates the exposure when the image receptor has received the required
radiation intensity
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, Lmrt state review QUESTIONS WITH
COMPLETE SOLUTION 2024/25 UPDATE
high frequency generator - CORRECT ANSWER , What uses AC and DC power
converters to change the incoming line from 60Hz to 6000Hz?
three phase generator - CORRECT ANSWER ...
single phase generator - CORRECT ANSWER produce a pulsating current that
alternates from positive to negative and are power by a single source of ac
diode - CORRECT ANSWER A device that permits current to flow through it in only
one direction
rectification - CORRECT ANSWER The process of converting AC to DC.
filament circuit - CORRECT ANSWER low-voltage circuit; uses 3-5 volts, regulates
the flow of electrical current to the filament of the x-ray tube; controlled by mA
settings
high voltage circuit - CORRECT ANSWER Purpose is to provide high electrical
potential needed to accelerate electrons from cathode to the anode. Controlled
by kVp.
autotransformer - CORRECT ANSWER Provides a variable yet predetermined
voltage to the high-voltage step-up transformer. It acts as the kilovoltage selector.
exposure switch - CORRECT ANSWER closes the circuit and allows current to flow
though primary side of step up transformer
recorded detail - CORRECT ANSWER Sharpness of the structural edges of the
radiographic image. Describes the degree of geometric sharpness or accuracy of
the structural lines recorded in the image.
exposure time - CORRECT ANSWER ...
sid - CORRECT ANSWER ...
OID - CORRECT ANSWER ...
quantom mottle - CORRECT ANSWER refers to the random nature by which x-rays
interact with IR, under the control of radiographer and is principal contributor to
radiographic noise (the use of high mAs, low kVp settings and slower IR's reduces
)
control consol - CORRECT ANSWER The unit inside the control booth, where the
operator sets all of the exposure techniques, such as: kilovolts peak,
milliampheres, and exposure time.
contrast - CORRECT ANSWER shades of gray on an image
x ray generator - CORRECT ANSWER ...
heat units - CORRECT ANSWER The formula, mA x kVp x time, is used to
determine what
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