LMRT STATE
PRACTICE EXAM QUESTIONS WITH
CORRECT DETAILED ANSWERS |
ALREADY GRADED A+<RECENT
VERSION>
1. Indicator number - answer✅ how much radiation was absorbed into the
phosphors
2. Image stitching - 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.
3. Image annotation - answer✅ allow the technologist to inset preset text
or manual text on the image
4. Contrast resolution (digital) - answer✅ ability to distinguish anatomic
structures having similar subject contrast
5. Spatial resolution - answer✅ refers to the amount of detail present in
any image .phosphor layer thickness and pixel size determines resolution
in cr.
6. Pixel - answer✅ a single square within a matrix
7. Matrix - answer✅ a series of very small boxes that form a digital image
,8. Direct conversion - 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
9. Charged coupled device - answer✅ component which light enters and is
converted into video or electronic signal
10.Thin film transistor - answer✅ used to read charges collected during an
exposure
11.Photodiode - answer✅ a silicon solid state device sensitive to light.
Converts light into an electrical signal.
12.Scintillator - 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.
13.Flat panel detector - 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
14.Density - 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.
15.Automatic exposure control - 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
16.High frequency generator - answer✅ , what uses ac and dc power
converters to change the incoming line from 60hz to 6000hz?
,17.Single phase generator - answer✅ produce a pulsating current that
alternates from positive to negative and are power by a single source of
ac
18.Diode - answer✅ a device that permits current to flow through it in only
one direction
19.Rectification - answer✅ the process of converting ac to dc.
20.Filament circuit - 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
21.High voltage circuit - answer✅ purpose is to provide high electrical
potential needed to accelerate electrons from cathode to the anode.
Controlled by kvp.
22.Autotransformer - answer✅ provides a variable yet predetermined
voltage to the high-voltage step-up transformer. It acts as the kilovoltage
selector.
23.Exposure switch - answer✅ closes the circuit and allows current to flow
though primary side of step up transformer
24.Recorded detail - 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.
, 25.Quantom mottle - 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 ____)
26.Control consol - answer✅ the unit inside the control booth, where the
operator sets all of the exposure techniques, such as: kilovolts peak, milli
ampheres, and exposure time.
27.Contrast - answer✅ shades of gray on an image
28.Heat units - answer✅ the formula, ma x KVP x time, is used to
determine what
29.The maximum heat capacity of the anode of the x-ray is rated in terms of:
- answer✅ heat units
30.Back up timer - answer✅ what is set in case of failure in AEC
31.Umbra - answer✅ actual anatomical area on a film
32.Penumbra - answer✅ the blurred/ indistinct area that surrounds an
image
33.Prime factors - answer✅ what is the term for the three principal factors
that affect Xray emission that are under direct control of radiographer?
34.Prime factors - answer✅ KVP ma time SID
PRACTICE EXAM QUESTIONS WITH
CORRECT DETAILED ANSWERS |
ALREADY GRADED A+<RECENT
VERSION>
1. Indicator number - answer✅ how much radiation was absorbed into the
phosphors
2. Image stitching - 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.
3. Image annotation - answer✅ allow the technologist to inset preset text
or manual text on the image
4. Contrast resolution (digital) - answer✅ ability to distinguish anatomic
structures having similar subject contrast
5. Spatial resolution - answer✅ refers to the amount of detail present in
any image .phosphor layer thickness and pixel size determines resolution
in cr.
6. Pixel - answer✅ a single square within a matrix
7. Matrix - answer✅ a series of very small boxes that form a digital image
,8. Direct conversion - 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
9. Charged coupled device - answer✅ component which light enters and is
converted into video or electronic signal
10.Thin film transistor - answer✅ used to read charges collected during an
exposure
11.Photodiode - answer✅ a silicon solid state device sensitive to light.
Converts light into an electrical signal.
12.Scintillator - 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.
13.Flat panel detector - 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
14.Density - 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.
15.Automatic exposure control - 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
16.High frequency generator - answer✅ , what uses ac and dc power
converters to change the incoming line from 60hz to 6000hz?
,17.Single phase generator - answer✅ produce a pulsating current that
alternates from positive to negative and are power by a single source of
ac
18.Diode - answer✅ a device that permits current to flow through it in only
one direction
19.Rectification - answer✅ the process of converting ac to dc.
20.Filament circuit - 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
21.High voltage circuit - answer✅ purpose is to provide high electrical
potential needed to accelerate electrons from cathode to the anode.
Controlled by kvp.
22.Autotransformer - answer✅ provides a variable yet predetermined
voltage to the high-voltage step-up transformer. It acts as the kilovoltage
selector.
23.Exposure switch - answer✅ closes the circuit and allows current to flow
though primary side of step up transformer
24.Recorded detail - 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.
, 25.Quantom mottle - 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 ____)
26.Control consol - answer✅ the unit inside the control booth, where the
operator sets all of the exposure techniques, such as: kilovolts peak, milli
ampheres, and exposure time.
27.Contrast - answer✅ shades of gray on an image
28.Heat units - answer✅ the formula, ma x KVP x time, is used to
determine what
29.The maximum heat capacity of the anode of the x-ray is rated in terms of:
- answer✅ heat units
30.Back up timer - answer✅ what is set in case of failure in AEC
31.Umbra - answer✅ actual anatomical area on a film
32.Penumbra - answer✅ the blurred/ indistinct area that surrounds an
image
33.Prime factors - answer✅ what is the term for the three principal factors
that affect Xray emission that are under direct control of radiographer?
34.Prime factors - answer✅ KVP ma time SID
