8873875
Pregunta 1
Pregunta
[blank_start]Absorption coefficient[blank_end]: Determines how far into a material photons of a particular wavelength can penetrate before it is absorbed
[blank_start]Detective quantum efficiency (DQE)[blank_end]: The percentage of photons absorbed in a material per given exposure
Respuesta
-
Absorption coefficient
-
Detective quantum efficiency (DQE)
-
Detective quantum efficiency (DQE)
-
Absorption coefficient
Pregunta 2
Pregunta
The higher the DQE, the more [blank_start]efficient[blank_end] the system is
Respuesta
-
efficient
-
inefficient
Pregunta 3
Pregunta
The higher the frequency, the more penetrating the photon is
Respuesta
- True
- False
Pregunta 4
Pregunta
The higher the DQE = [blank_start]less[blank_end] radiation you use
Respuesta
-
less
-
more
Pregunta 5
Pregunta
From highest to lowest in efficiency of turning photons into light
[blank_start]DR[blank_end] --> [blank_start]CR[blank_end] --> [blank_start]Screen[blank_end]
Respuesta
-
DR
-
CR
-
Screen
-
CR
-
DR
-
Screen
-
Screen
-
DR
-
CR
Pregunta 6
Pregunta
How many shades of gray can be produced by a photon beam?
Respuesta
-
1,000
-
10,000
-
16,000
-
1,600
Pregunta 7
Pregunta
A DR system can produce how many shades of gray?
Respuesta
-
1,000
-
10,000
-
1,6000
-
16,000
Pregunta 8
Pregunta
Window width: [blank_start]Controls contrast[blank_end]
Window height: [blank_start]Controls density[blank_end]
Respuesta
-
Controls contrast
-
Control density
-
Controls density
-
Controls contrast
Pregunta 9
Pregunta
What does a wide window width do?
Respuesta
-
Decreases contrast
-
Increases contrast
Pregunta 10
Pregunta
What does a high window height do?
Respuesta
-
Image becomes darker
-
Image becomes lighter
Pregunta 11
Pregunta
[blank_start]Contrast resolution[blank_end]: Visibility of detail
[blank_start]Spatial resolution[blank_end]: Clarity, how clear a part it
Respuesta
-
Contrast resolution
-
Spatial resolution
-
Spatial resolution
-
Contrast resolution
Pregunta 12
Pregunta
[blank_start]Spatial resolution[blank_end]: measured by MTF
[blank_start]Contrast resolution[blank_end]: measured by SNR
Respuesta
-
Spatial resolution
-
Contrast resolution
-
Contrast resolution
-
Spatial resolution
Pregunta 13
Pregunta
[blank_start]Amplitude[blank_end] is how much energy a signal has
Respuesta
-
Amplitude
-
Frequency
Pregunta 14
Pregunta
As parts get smaller, blur [blank_start]increases[blank_end]
Respuesta
-
increases
-
decreases
Pregunta 15
Pregunta
You can image objects smaller than the pixel size
Respuesta
- True
- False
Pregunta 16
Pregunta
The smaller the pixel size, the [blank_start]higher[blank_end] the frequency
Respuesta
-
higher
-
lower
Pregunta 17
Pregunta
The ratio of photons hitting the phosphor and the number that stays in the phosphor is known as what?
Respuesta
-
SNR
-
MTF
-
Line spread function
-
Absorption coefficient
Pregunta 18
Pregunta
In radiography, increase mAs, [blank_start]increases[blank_end] SNR
Respuesta
-
increases
-
decreases
Pregunta 19
Pregunta
In DSA,
Signal [blank_start]increases[blank_end] with number of frames
Noise [blank_start]increases[blank_end] proportionate to the square root of number of frames
Respuesta
-
increases
-
decreases
-
increases
-
decreases
Pregunta 20
Pregunta
[blank_start]Smaller[blank_end] parts require higher contrast to be seen
[blank_start]Larger[blank_end] parts require lower contrast to be seen
Respuesta
-
Smaller
-
Larger
-
Larger
-
Smaller
Pregunta 21
Pregunta
[blank_start]Lumen[blank_end]: Total amount of light given off by source relative to the frequencies that the eye is sensitive
[blank_start]Radiant light[blank_end]: The total amount of light given off by a source
Respuesta
-
Lumen
-
Radiant light
-
Radiant light
-
Lumen
Pregunta 22
Pregunta
Cosine law is also known as Lambert's law
Respuesta
- True
- False
Pregunta 23
Pregunta
Luminous intensity is proportional to the viewing angle
Respuesta
- True
- False
Pregunta 24
Pregunta
Before you see the image, the computer does these three things:
Respuesta
-
Enhances pixel uniformity
-
Reduces noise
-
Improves contrast
-
Improves clarity
Pregunta 25
Pregunta
How do you compensate for image lag?
Respuesta
-
Increase time between exposures
-
Decrease time between exposures
Pregunta 26
Pregunta
[blank_start]Annotation[blank_end]: adding text
[blank_start]Image stitching[blank_end]: multiple image composite
[blank_start]Image inversion[blank_end]: reverse polarity of an image
[blank_start]Shuttering/cropping[blank_end]: post process "collimation"
Respuesta
-
Annotation
-
Image stitching
-
Image inversion
-
Shuttering/cropping
-
Image stitching
-
Image inversion
-
Shuttering/cropping
-
Annotation
-
Image inversion
-
Shuttering/cropping
-
Annotation
-
Image stitching
-
Shuttering/cropping
-
Annotation
-
Image stitching
-
Image inversion
Pregunta 27
Pregunta
Developed test pattern to visually assess picture detail and contrast for monitors
Respuesta
-
SMPTE
-
NEMA
-
VESA
-
AAPM
Pregunta 28
Pregunta
Measures contrast and detail
Respuesta
-
SMPTE
-
NEMA
-
VESA
-
AAPM
Pregunta 29
Pregunta
Developed DICOM standard
Respuesta
-
NEMA
-
SMPTE
-
VESA
-
AAPM
Pregunta 30
Pregunta
Developed gray scale display function (GSDF) standard
Respuesta
-
NEMA
-
SMPTE
-
VESA
-
AAPM
Pregunta 31
Pregunta
Developed flat panel evaluation procedures and standards
Respuesta
-
VESA
-
NEMA
-
AAPM
-
SMPTE
Pregunta 32
Pregunta
[blank_start]TG 18-PX[blank_end]: resolution uniformity
[blank_start]TG 18-LN[blank_end]: luminance (glare, uniformity, reflection, etc.)
[blank_start]TG 18-QC[blank_end]: Geometric distortion
[blank_start]TG 18-CX[blank_end]: resolution
Respuesta
-
TG 18-PX
-
TG 18-LN
-
TG 18-QC
-
TG 18-CX
-
TG 18-LN
-
TG 18-QC
-
TG 18-CX
-
TG 18-PX
-
TG 18-QC
-
TG 18-CX
-
TG 18-PX
-
TG 18-LN
-
TG 18-CX
-
TG 18-PX
-
TG 18-LN
-
TG 18-QC
Pregunta 33
Pregunta
[blank_start]Illuminance[blank_end]: measure of surface illumination
[blank_start]Fluorescence[blank_end]: immediate light emission and cessation
[blank_start]Phosphorescence[blank_end]: lag in emission and cessation
[blank_start]Irradiance[blank_end]: radiant flux/unit area
[blank_start]Luminescence[blank_end]: light from cold source
Respuesta
-
Illuminance
-
Fluorescence
-
Phosphorescence
-
Irradiance
-
Luminescence
-
Fluorescence
-
Phosphorescence
-
Irradiance
-
Luminescence
-
Illuminance
-
Phosphorescence
-
Irradiance
-
Luminescence
-
Illuminance
-
Fluorescence
-
Irradiance
-
Fluorescence
-
Phosphorescence
-
Illuminance
-
Luminescence
-
Luminescence
-
Illuminance
-
Fluorescence
-
Phosphorescence
-
Irradiance
Pregunta 34
Pregunta
What determines gray scale?
Respuesta
-
Pixel depth
-
Voxels
-
Contrast
-
Density
Pregunta 35
Pregunta
[blank_start]Client-server based[blank_end]: the client provides the software for operation
[blank_start]Server[blank_end]: a program application that allows the sharing of data with other programs
[blank_start]Client[blank_end]: a program that can accept and use data from a server
Respuesta
-
Client-server based
-
Server
-
Client
-
Server
-
Client-server based
-
Client
-
Client
-
Client-server based
-
Server
Pregunta 36
Pregunta
Which of the following has no storage capability at work station?
Respuesta
-
client-server based
-
web-based
-
stand-alone
Pregunta 37
Pregunta
"Dead in the water" if archive goes down
Respuesta
-
client-server based
-
web-based
-
stand-alone
Pregunta 38
Pregunta
Only one person can read an image at a time
Respuesta
-
client-server based
-
web-based
-
stand-alone
Pregunta 39
Pregunta
Remotely hosted electronic system accessed via an internet web browser
Respuesta
-
client-server based
-
web-based
-
stand-alone
Pregunta 40
Pregunta
Most operations done at a remote server
Respuesta
-
client-server based
-
web-based
-
stand-alone
Pregunta 41
Pregunta
Ability to customize system is limited
Respuesta
-
web-based
-
client-server based
-
stand-alone
Pregunta 42
Pregunta
Acquisitions are stored locally until deleted
Respuesta
-
stand-alone
-
web-based
-
client-server based
Pregunta 43
Pregunta
Not dependent on network for speed
Respuesta
-
web-based
-
client-server based
-
stand-alone
Pregunta 44
Pregunta
Difficult to hack
Respuesta
-
web-based
-
client-server based
-
stand-alone
Pregunta 45
Pregunta
one archive and no network
Respuesta
-
stand-alone
-
web-based
-
client-server based
Pregunta 46
Pregunta
[blank_start]Multiplanar reconstruction (MPR)[blank_end]: using data from one plane to produce an image in another plane
[blank_start]Minimum intensity projection (MiniIP)[blank_end]: accentuates air filled structures
[blank_start]Volume rendering technique (VRT)[blank_end]: color conversion
[blank_start]Shaded surface display (SSD)[blank_end]: filtering or windowing
[blank_start]Maximum intensity projection (MIP)[blank_end]: accentuates contrast media filled vessels
Respuesta
-
Multiplanar reconstruction (MPR)
-
Minimum intensity projection (MiniIP)
-
Volume rendering technique (VRT)
-
Shaded surface display (SSD)
-
Maximum intensity projection (MIP)
-
Minimum intensity projection (MiniIP)
-
Multiplanar reconstruction (MPR)
-
Volume rendering technique (VRT)
-
Shaded surface display (SSD)
-
Maximum intensity projection (MiniIP)
-
Volume rendering technique (VRT)
-
Multiplanar reconstruction (MPR)
-
Minimum intensity projection (MiniIP)
-
Shaded surface display (SSD)
-
Maximum intensity projection (MIP)
-
Shaded surface display (SSD)
-
Multiplanar reconstruction (MPR)
-
Minimum intensity projection (MiniIP)
-
Volume rendering technique (VRT)
-
Maximum intensity projection (MIP)
-
Maximum intensity projection (MIP)
-
Multiplanar reconstruction (MPR)
-
Minimum intensity projection (MiniIP)
-
Volume rendering technique (VRT)
-
Shaded surface display (SSD)
Pregunta 47
Pregunta
Most popular RAID
Respuesta
-
Level 0
-
Level 1
-
Level 3
-
Level 4
-
Level 5
Pregunta 48
Pregunta
What RAID level is data mirrored?
Respuesta
-
Level 0
-
Level 1
-
Level 2
-
Level 3
-
Level 4
-
Level 5
Pregunta 49
Pregunta
What RAID level is not used much (cannot handle multiple queries)?
Respuesta
-
Level 0
-
Level 1
-
Level 3
-
Level 4
-
Level 5
Pregunta 50
Pregunta
What RAID level can handle multiple requests simultaneously?
Respuesta
-
Level 0
-
Level 1
-
Level 3
-
Level 4
-
Level 5
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