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WorksheetsRAD 217 Final Comprehensive Review
Total questions: 60
Worksheet time: 3600secs
Long-term storage for digital documents and image data.
Archive
Warehouse
RAM
BIOS
Imaging plates used in CR are comprised of:
barium fluorohalide w/ europium
cesium iodide w/ calcium
gadolinium oxysulfide w/ iodine
amorphous selenium w/ bromine
Standardized format that allowed for digital imaging systems to communicate, regardless of the manufacturer.
RIS
HL7
DICOM
PACS
Which of the following systems captures the x-ray image, converts it to light, and then releases electrons to be stored as a latent image?
Film-screen radiography
Computed radiography
Direct digital imaging
Indirect digital imaging
A specific set of steps designed to solve a problem or complete a task.
Calculation
Computation
Algorithm
Guideline
The number of shades of gray that can be represented on an image.
bit depth
matrix size
dynamic range
spatial resolution
The CR reader uses _____ to release the energy that is trapped within the phosphor centers.
red laser light
white fluorescent light
infrared light
ultraviolet light
To prevent a moiré pattern in your CR image, it is best to have the grid lines running _____ to the direction of the laser beam.
perpendicular
parallel
diagonal
transverse
Nyquist theorem refers to the
the accuracy of the histogram
the efficiency of the FPD
the sampling frequency of the digital data
the brightness of the laser beam
______ phosphors are grown into thin need-like columns.
structured
turbid
fixed
unstructured
Multiple computers that are connected within a close geographical location, such as a single hospital, are on a
WAN
LAN
VPN
DICOM
To facilitate the secure transfer of information from a computer outside the hospital to the hospital server a ___ should be used.
WAN
VPN
LAN
LPN
Which substance releases electrons when struck by light photons?
amorphous selenium
amorphous silicon
gadolinium oxysulfide
cesium iodide
Which modality was the first to utilize digital imaging?
CT
MRI
US
NM
The energy that is trapped in the phosphor centers of the PSP plate following exposure to X-rays is the:
latent image
manifest image
raw data
image data
Another name for exposure latitude is:
dynamic range
linear response
characteristic response
subject contrast
In a (a) network each device is able to serve the same functions (is equal).
Which of the following would be considered a PACS peripheral?
CD Burners
Servers
Computers
Imaging Equipment
Improper collimation can result in
histogram analysis errors
grid cutoff
ghosting
aliasing
TFTs are utilized in which of the following types of imaging?
Indirect DR
Direct DR
CR (PSP)
Conventional (F/S)
Which of the following should be done to ensure that the digital image is processed properly?
Center the exposure field to the IR
Center the anatomical part to the IR
Ensure no collimated borders are detected
Ensure four collimated borders are detected
Which of the following is not a factor that contributes to the quality of a digital image?
Brightness
Spatial Resolution
Contrast
Noise
Which of the following statements is(are) true:
F/S radiography has higher spatial resolution than digital imaging
Digital imaging has higher spatial resolution than conventional radiography
Digital imaging has better contrast resolution than F/S radiography
Conventional radiography has better contrast than digital imaging
Which of the following are true regarding digital imaging?
Increased/Wide dynamic range
Nonlinear exposure response
Linear exposure response
Reduced/Narrow dynamic range
The process of transferring digital images to a remote location for the purpose of reading by a radiologist is called:
Teleradiology
Long-range reading
Remote radiology
PACS
DICOM
Which test pattern is seen on this image?
TG18-QC
SMPTE
TG18-LN 1
ACR QC 30
What is used to reduce the size of the image files to increase the speed of the network transfer of the images?
compression
quality assurance
data reduction system
image transfer acceleration
Which term is used to describe a type of storage where a copy of the data is stored on a separate disk?
Mirroring
Striping
RAID
Tier
Excessive post-processing can result in:
Improved spatial resolution
Improved image quality
Loss of information
Increased radiologist manipulation
Which process allows for visualization of the area of interest when overexposure or underexposure occur?
repeat exposures
histogram analysis
shuttering
automatic rescaling
To prevent the loss of energy from the electrons in the phosphor layer:
Latent images on PSP plates should be processed quickly after exposure
Images should be taken using very high technical factors
Image processing should be done slowly, to allow time for oversampling
Manifest images on PSP plates should be processed quickly after exposure
The histogram displays only useful data by locating the
minimum signal
minimum and maximum signal
all pixel values
maximum signal
This type of digital imaging utilizes magnification and optic coupling.
Direct conversion w/ TFT
Direct conversion w/ CCD
Indirect conversion w/ CCD
Indirect conversion w/ CMOS
With ___ technology, each pixel has an amplifier.
CCD
CMOS
TFT
FPD
Gadolinium Oxysulfide phosphors:
are unstructured
are structured
are very efficient
produce significant light spread
The type of flat-panel detector that uses thin films of silicon integrated with arrays of photodiodes is known as a(n)
CsI detector
charge coupled device
CMOS
amorphous silicon detector
A device that acts like a switch to send electrical charges to the image processor in a direct conversion flat-panel detector is known as
thin-film transistor
charged coupled device
analog to digital converter
photodiode
Which part of the PACS houses all of the historic digital image data along with the current digital data being generated by the modalities?
Review workstation
File room
Display workstation
Archive
A PACS consists of
Image acquisition
display workstation
archive servers
Which of the following are considered PACS architectures?
Distributed system
Local-analog system
Client/Server-based system
Web-based system
Which of the following describes a thin-client computer?
A computer that stores data for the network
A computer that manages resources for other computers
A computer that works independently of the network
Any computer that needs a server for task completion
A network that uses a central computer that sends the entire original resource to the client is known as a
distributed network
WAN.
LAN.
server-based network.
Proper patient demographic input ensures
an increase in the amount of data tracking.
multiple versions of the patient’s name.
linking of all the patient’s files.
multiple records on each patient.
Which one of the following serves to protect against static build-up, dust collection, and mechanical damage to the imaging plate?
Cassette front
Lightweight plastic
Felt material
Aluminum backing
The reflective layer
absorbs and reduces static.
gives the imaging sheet strength.
protects the back of the cassette.
sends light in a forward direction.
The imaging plate layer that absorbs stimulating light and reflects emitted light is the (a) layer.
When the imaging plate is irradiated, stimulated electrons enter the (a) layer.
Detector elements are formed by voltage gates that _____ at readout to _____ the flow of electrons.
(a)
Which of the following is used as a photoconductor?
Gd₂O₂S
a-Se
a-Si
CsI
How dark or light a digital image appears on a display monitor is known as
spatial resolution
brightness
contrast resolution
density
When insufficient light is produced by the imaging plate phosphor, the image will
be light
be dark
be grainy
not be formed
Which function represents the range of gray values that are being viewed on the monitor?
Density
Histogram
Level
Window
Shuttering is a post-exposure image manipulation technique that
is placed on the patient
is placed on the cassette
is added to the screen image
changes the amount of scatter
The active element in a storage phosphor is
barium fluorohalide
europium
glutaraldehyde
lithium
Which of the following are true regarding the image manager?
Contains the master database of all on the archive
Catalogs demographic data for studies
Stores images in its database
Controls the receipt of all images
The network connection that uses glass threads to transmit data is
infrared
twisted pair
fiber optic
coaxial
The laser scans the imaging plate in a (a) pattern.
The process of scanning the moving imaging plate is known as
translation.
digitization.
transient scanning.
transition.
A universally accepted standard for exchanging medical imaging via a networked set of display workstations, archive, and imaging modalities is
HIPAA.
DICOM.
HL-7.
HIS.
Three major categories of QC testing that can be used at various times include
routine testing, acceptance testing, and problem maintenance.
error testing, problem maintenance, and routine maintenance.
problem testing, acceptance maintenance, and routine maintenance.
acceptance testing, routine maintenance, and error maintenance.
