AART Review
2
1. What are the 6
1. Protective Layer-made of fiber or Magnesium
lay- ers of the CR
2. Phosphor or active layer-Photostimulable phosphor from
imaging plate?
barium flouro- halide family
3. Conductive Layer-grounds the IP from electrostatic
charge(increases spa- tial-resolution)
4. Support Layer
5. Light shield (reflective layer)
6. Backing layer
2. What does the
ADC do? Analog-to digital converter. It converts the transmission signal
produced by the detectors into numerical information. Determines
the number of shades of gray in the image.
3. What is a histogram? A graphic representation of the numerical
tone(grays/blacks/whites) of an
x-ray exposure.
It identifies all densities on the imaging plate in the form a graph.
4. What is the prima- LUT-Look Up Table
ry controller of
This takes place pre processing.(Brightness AND contrast)
digital contrast?
5. What causes a
Incomplete erasure of the imaging plate. "Ghost" plate
ghost- ing error on
the CR plate?
1/
6
, AART Review
2
6. What creates a If the laser scan of the CR runs parallel to the grid lines. This creates a
moire artifact in WAVE LIKE artifact.
CR?
image brightness
7. What does
window level
control?
image contrast
8. What does
window width
control?
9. What is an example of Chest x ray
a long scale (lots
of gray shades),
low con- trast
image?
10. What is an 11. What are some post processing applica-
example of a tions in CR?
short scale(black
and white), high
con- trast image?
2/
6
2
1. What are the 6
1. Protective Layer-made of fiber or Magnesium
lay- ers of the CR
2. Phosphor or active layer-Photostimulable phosphor from
imaging plate?
barium flouro- halide family
3. Conductive Layer-grounds the IP from electrostatic
charge(increases spa- tial-resolution)
4. Support Layer
5. Light shield (reflective layer)
6. Backing layer
2. What does the
ADC do? Analog-to digital converter. It converts the transmission signal
produced by the detectors into numerical information. Determines
the number of shades of gray in the image.
3. What is a histogram? A graphic representation of the numerical
tone(grays/blacks/whites) of an
x-ray exposure.
It identifies all densities on the imaging plate in the form a graph.
4. What is the prima- LUT-Look Up Table
ry controller of
This takes place pre processing.(Brightness AND contrast)
digital contrast?
5. What causes a
Incomplete erasure of the imaging plate. "Ghost" plate
ghost- ing error on
the CR plate?
1/
6
, AART Review
2
6. What creates a If the laser scan of the CR runs parallel to the grid lines. This creates a
moire artifact in WAVE LIKE artifact.
CR?
image brightness
7. What does
window level
control?
image contrast
8. What does
window width
control?
9. What is an example of Chest x ray
a long scale (lots
of gray shades),
low con- trast
image?
10. What is an 11. What are some post processing applica-
example of a tions in CR?
short scale(black
and white), high
con- trast image?
2/
6
