Show:
AMFPI
Direct
Conversion
Indirect COnversion
Image Artifacts
Miscellaneous
100
AMFPI stands for...
What is Active-matrix flat-panel imager
100
The type of absorption material used in direct conversion is...
What is Photodetectors
100
True or false: Indirect conversion uses TFT detectors.
What is true
100
Dust, scratches, and static may result in _________.
What is dead pixels
100
1995
What is the year TFT flat-panel arrays were introduced.
200
AMFPIs consist of...
What is flat-panel array and an absorption material
200
a-Se stands for...
What is amorphous selenium
200
True or false: the scintillator is made of a phosphor material.
What is True
200
Flat-fielding is another name for...
What is gain calibration
200
Flat-panel arrays have a ____ design of pixels.
What is 2-D
300
Two main types of absorption materials are...
What is photodetectors and scintillators
300
In direct conversion, the x-rays are absorbed and converted to _______.
What is electrons
300
In the first step of indirect conversion, ________________. In the second step, __________________.
What is 1) x-rays are converted to light 2) light is converted to electrical charges
300
Image lag can be avoided by...
What is increasing the amount of time between exposures
300
Del stands for...
What is detector element
400
The pixel array is attached to a...
What is thin, glass backing (substrate)
400
What size pixels make up the TFT in direct conversion?
What is 100-200 um
400
__________ and __________ make up the dedicated electronics in TFT detectors.
What is ICs and amplifiers
400
__________ removes inherent signal that remains in a detector.
What is Offset correction
400
Converted electrons are stored in...
What is TFT detectors
500
AMFPI measures...
What is the response of the absorption material to x-rays
500
The photodetector is usually ____ um thick for radiography
What is 500
500
GD2O2S scintillators are ________ due to their contruction, leads to light spread.
What is Unstructured.
500
Manufacturers' standards allow for approximately ______ defective pixels
What is 0.1-0.2%
500
FET stands for...
What is Field-effect transistor