Lmrt state review with answers 2024
indicator number - ANSWERShow much radiation was absorbed into the phosphors
image stitching - ANSWERSstitching 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 - ANSWERSallow the technologist to inset preset text or manual text
on the image
contrast resolution (digital) - ANSWERSAbility to distinguish anatomic structures having
similar subject contrast
spatial resolution - ANSWERSRefers to the amount of detail present in any
image.Phosphor layer thickness and pixel size determines resolution in CR.
pixel - ANSWERSA single square within a matrix
matrix - ANSWERSa series of very small boxes that form a digital image
direct conversion - ANSWERSone 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 - ANSWERScomponent which light enters and is converted
into video or electronic signal
thin film transistor - ANSWERSused to read charges collected during an exposure
photodiode - ANSWERSA silicon solid state device sensitive to light. Converts light into
an electrical signal.
scintillator - ANSWERSAmorphous 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 - ANSWERSa type of digital detector employing amorphous silicon
or selenium detector material, bonded with thin-film transistor technology for digital
image creation and amplification
density - ANSWERSIt 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 - ANSWERSa 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
high frequency generator - ANSWERS, What uses AC and DC power converters to
change the incoming line from 60Hz to 6000Hz?
three phase generator - ANSWERS...
single phase generator - ANSWERSproduce a pulsating current that alternates from
positive to negative and are power by a single source of ac
diode - ANSWERSA device that permits current to flow through it in only one direction
rectification - ANSWERSThe process of converting AC to DC.
filament circuit - ANSWERSlow-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 - ANSWERSPurpose is to provide high electrical potential needed
to accelerate electrons from cathode to the anode. Controlled by kVp.
autotransformer - ANSWERSProvides a variable yet predetermined voltage to the high-
voltage step-up transformer. It acts as the kilovoltage selector.
exposure switch - ANSWERScloses the circuit and allows current to flow though
primary side of step up transformer
recorded detail - ANSWERSSharpness 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 - ANSWERS...
sid - ANSWERS...
OID - ANSWERS...
quantom mottle - ANSWERSrefers 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 - ANSWERSThe unit inside the control booth, where the operator sets all
of the exposure techniques, such as: kilovolts peak, milliampheres, and exposure time.
contrast - ANSWERSshades of gray on an image
indicator number - ANSWERShow much radiation was absorbed into the phosphors
image stitching - ANSWERSstitching 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 - ANSWERSallow the technologist to inset preset text or manual text
on the image
contrast resolution (digital) - ANSWERSAbility to distinguish anatomic structures having
similar subject contrast
spatial resolution - ANSWERSRefers to the amount of detail present in any
image.Phosphor layer thickness and pixel size determines resolution in CR.
pixel - ANSWERSA single square within a matrix
matrix - ANSWERSa series of very small boxes that form a digital image
direct conversion - ANSWERSone 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 - ANSWERScomponent which light enters and is converted
into video or electronic signal
thin film transistor - ANSWERSused to read charges collected during an exposure
photodiode - ANSWERSA silicon solid state device sensitive to light. Converts light into
an electrical signal.
scintillator - ANSWERSAmorphous 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 - ANSWERSa type of digital detector employing amorphous silicon
or selenium detector material, bonded with thin-film transistor technology for digital
image creation and amplification
density - ANSWERSIt 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 - ANSWERSa 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
high frequency generator - ANSWERS, What uses AC and DC power converters to
change the incoming line from 60Hz to 6000Hz?
three phase generator - ANSWERS...
single phase generator - ANSWERSproduce a pulsating current that alternates from
positive to negative and are power by a single source of ac
diode - ANSWERSA device that permits current to flow through it in only one direction
rectification - ANSWERSThe process of converting AC to DC.
filament circuit - ANSWERSlow-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 - ANSWERSPurpose is to provide high electrical potential needed
to accelerate electrons from cathode to the anode. Controlled by kVp.
autotransformer - ANSWERSProvides a variable yet predetermined voltage to the high-
voltage step-up transformer. It acts as the kilovoltage selector.
exposure switch - ANSWERScloses the circuit and allows current to flow though
primary side of step up transformer
recorded detail - ANSWERSSharpness 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 - ANSWERS...
sid - ANSWERS...
OID - ANSWERS...
quantom mottle - ANSWERSrefers 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 - ANSWERSThe unit inside the control booth, where the operator sets all
of the exposure techniques, such as: kilovolts peak, milliampheres, and exposure time.
contrast - ANSWERSshades of gray on an image
