Term
Scintillators are materials that:
1. That only have a turbid arrangement.
2. Covert x-rays into visible light.
3. Make the upper layer of the exposure side of an indirect flat panel detector. |
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Definition
Covert x-rays into visible light.
Make the upper layer of the exposure side of an indirect flat panel detector. |
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Term
Cesium iodide (CsI) is an example of a
1. Structured phosphor.
2. Structured scintillator.
3. Photoconductor.
a.
1 only
d.1 and 2 only
b.2 only
e.1, 2, and 3
c.2 and 3 only |
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Definition
Structured phosphor.
Structured scintillator.
Photoconductor. |
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Term
In an indirect flat panel radiation DR detector light produced by the scintillator is converted into an electrical signal by a photodiode made from
a. Amorphous selenium
b. Amorphous silicon
c. Structured CsI
d.Turbid phosphor
e.TFT matrix |
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Definition
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Term
Indirect DR detectors convert x-rays to _______________ by stimulation of a ______________ then into _______ ________ by ________ _________ that is collected by the TFT and sent to an ADC.
a.
light, scintillator, electronic signal, amorphous silicon
b.
light, TFT, amorphous selenium, electronic signal
c.
light, scintillator, electronic signal, amorphous selenium
d.
light, facilitator, electronic signal, photo conductor
e.
electrons, photoconductor, light signal, structured phosphors
a.
light, scintillator, electronic signal, amorphous silicon
b.
light, TFT, amorphous selenium, electronic signal
c.
light, scintillator, electronic signal, amorphous selenium
d.
light, facilitator, electronic signal, photo conductor
e.
electrons, photoconductor, light signal, structured phosphors |
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Definition
| light, scintillator, electronic signal, amorphous silicon |
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Term
A photostimulable phosphor plate is used with?
a.
Computed radiography CR.
d.
Image-intensified fluoroscopy.
b.
Radiographic intensifying screens.
e.
Direct digital radiography.
c.
Fluoroscopic intensifying screens. |
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Definition
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Term
The luminescent light emitted by the PSP is transformed into the image seen on the CRT by
a.
PSP (photostimulable phosphor)
d.
helium- neon laser
b.
Scanner reader
e.
Photostimulated luminescence (PSL)
c.
ADC (Analog to digital converter) |
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Definition
| ADC (Analog to digital converter) |
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Term
When comparing direct DR to indirect DR
1. Direct DR uses a photoconductor where indirect DR uses a scintillator for x-ray energy conversions.
2. Indirect DR has a loss of resolution when compared to direct DR.
3. Direct DR has more steps when converting x-rays to an electronic signal.
a. 1 and 2 only
b. 2 and 3 only
c.1 and 3 only
d.1, 2, and 3 |
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Definition
Direct DR uses a photoconductor where indirect DR uses a scintillator for x-ray energy conversions.
Indirect DR has a loss of resolution when compared to direct DR. |
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Term
Flat panel digital radiographic x-ray detectors include:
1. Indirect image acquisition with scintillators.
2. Direct image acquisition with photoconductors.
3. PSP's with photostimulable phosphors on IP plates.
a. 1 and 3 only c. 1 and 2 only b. 2 and 3 only d. 1, 2, and 3 |
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Definition
| Indirect image acquisition with scintillators. Direct image acquisition with photoconductors. |
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Term
Component of a CR image plate (IP) that records the radiographic image is the
a. emulsion
b helium-neon laser
c. photostimulable phosphor
d. pixel pitch
e. amorphous silicon |
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Definition
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Term
In digital imaging, as the size of the matrix increases
1. FOV increases
2. pixel size decreases
3. spatial resolution increases
a. 1 only
b. 1 and 2 only
c. 2 and 3 only
d. 1,2, 3 |
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Definition
2. pixel size decreases
3. spatial resolution increases |
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Term
Used for short term PACS archiving in a PACS network
a. RAID
b. jukebox
c. electronic tape
d. floppy disk
e. flash drive |
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Definition
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Term
| What is the definition of LAN? |
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Definition
| Local area network what covers a small geographic area like a home, office, or building |
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Term
Bit depth of 12 represents
a. a range of 0-11 grayscale values
b. range of 0-4095 grayscale values
c. maximum # of values of 12
d. max # of values of 4095
e. 1 byte of gray shades |
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Definition
| 0 to 4095 grayscale values |
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Term
|
Definition
| Picture archival and communication system |
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Term
DICOM stands for?
a. direct interface capture of of medical images
b. digital imaging and communications in medicine
c. direct image capture original medicine
d. direct capture of images in medicine
e. digital image capture in medicine |
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Definition
| Digital imaging and communications in medicine |
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Term
Characteristics of direct capture DR imaging include
1. Solid state detector plates
2. Direct capture imaging system
3. Immediate image display
a. 1 only
b. 1 and 3
c. 2 and 3
d. 1 and 2
e. 1, 2, 3 |
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Definition
E.
Solid state detector plates
Direct capture imaging system
Immediate image display |
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Term
During CR imaging, the latent image present on the PSP is changed to a computerized image by the
a. PSP
b. scanner-reader
c. ADC
d. helium-neon laser
e. DAC |
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Definition
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Term
The latent image is formed on the ____ for digital radiography.
a. radiographic film
b. image matrix
c. radiation detector
d. computer screen
e. laser beam |
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Definition
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Term
Term direct technology in digital imaging means:
a. imaging processed using chemicals
b. image process using light
c. image acquired without xradiation
d. image receptor is read with a laser light
e. image is acquired without light |
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Definition
| E image is acquired without light |
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Term
PSP is a type of:
a. direct technology
b. indirect technology
c. film
d. old tech
e. mystery tech |
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Definition
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Term
What is the relationship between LET and RBE?
a. direct
b. indirect
c. none |
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Definition
|
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Term
Grid ratio is defined as the ratio of the:
a. height of the lead strips to the distance between them
b. width of the lead strips to the height
c. number of lead strips to their width
d. width of the lead strip to the width of the interspace material |
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Definition
| a. height of the lead strips to the distance between them |
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Term
The component of the CR image plate (IP) that records the radiographic image is the:
a. emulsion
b. helium-neon laser
c. photostimulable phosphor
d. pixel pitch
e. amorphous silicon |
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Definition
| c. photostimulable phosphor |
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Term
Photoconductive materials are substances that can convert Xrays into
a. light
b. neutrons
c. electrons
d. xrays
e. amorphous silicon |
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Definition
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Term
The electronics of each DEL takes up a certain fixed amount of area that are known as
a. fill factor
b. dead zones
c. sensitive areas
d. F-traps
e. who knows |
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Definition
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Term
The laser used in most CR readers units emits light in the ___ portion of the color spectrum:
a. green
b. red
c. blue-violet
d. ultraviolet
e. all of theses |
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Definition
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Term
The voltage that must be applied to the surface of the photoconductor (amorphous selenium) for direct DR radiography is ____ so that the charged electrons released from the exposure attracted to the TFT pixels electrodes.
a. 1000
b. 25000
c. 5000
d. 50000
e. none |
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Definition
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