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Digital Imaging - Module 3

Terms in this set (19)

The delayed light emission that occurs in a CRT monitor after the screen refreshes is called:
persistence
An advantage of LCD monitors over CRT monitors is that LCD monitors:
have less screen glare
Cassettes that are specially designed for scoliosis exams contain how many PSP plates?
2
An LCD monitor's resolution is determined by:
pixel pitch
How many images/second does it take CRT monitors to refresh?
60 - 120
Pixel pitch describes:
how close pixels are to each other
Current ACR standards specify that gray-scale monitors used for interpreting radiographs provide a minimum of how many cd/m2?
171
Modifying demographic and image data on a workstation also alters the:
permanent patient record
Placing image information on an image after the examination is complete is called image:
annotation
If an image is acquired with the orientation of the image receptor upside down, what modality workstation tool can be used to orient the image the correct way?
rotate
When an image is obtained on several imaging plates that need to be combined later into one image, the process is referred to as:
stitching
Using a workstation to cover the unexposed area of an image with a black border is called:
shuttering
To accurately display the gray scale in a radiograph, the display monitor must be able to demonstrate at least how many distinct shades of gray?
256
Window and leveling on a workstation changes the digital image's:
brightness & contrast
In CRT display technology, an electron gun fires electrons at a:
fluorescent screen
The brightness of a display monitor is referred to as:
luminance
The difference between the maximum & minimum luminance of a display system is called:
contrast resolution
What increases as the matrix size of a display monitor increases?
spatial resolution
Most LCD monitors have an aspect ratio of:
16:9
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