Bits and Pixels
What is a BIT
A binary number (made up of 0 and 1)
What is the T.V monitor also known as
Cathode Ray Tube
Display modes in imaging
A mode
M mode
B mode
What is postprocessing
allows the sonographer to change, alter, or manipulate the image after it is frozen
How many shades of gray can each pixel store
1 shade of gray
How many BITS makes a BYTE
8 BITS
What is the typical value for an interlaced display
525 horizontal closely spaced lines
What does PACS stand ford for
Picture archiving and communications system
Is READ magnification pre or post processing
Post processing
256 shades
Information stored as a BIT
A pixel
What will give you a flicker free image
30 frames or more per second
A laser printer uses uses what kind of film
Emulsion film
List the functions of post processing
Read magnification, caliper placement or measuring, black/white inversion
Would you use multiple focal zones for better Temporal resolution
No, it decreases Temporal resolution (frame rate)
How can you increase the number of shades of gray the system can display
Add more BITS
What is the pattern the beam makes to create an image
A raster scan
What type of printer uses heat sensitive paper
Thermal printer
What functions can be used in pre or post processing
Persistence
Edge enhancement
Smoothing
Fill in interpolation
How many frames per second can be displayed at a time
Typically 30 or more
What does the Pixel's location relate to
The echo arrival time and beam orientation
If a higher resolution monitor has more pixels does this give us better temporal or spatial resolution
Spatial resolution
An example of Digital Format Storage is
Magneto- optical disc
What is fill in interpolation
Adds more pixels where some are missing from traveling away from the transducer
The relationship between Temporal resolution, imaging depth, line density, sector size and focal zones.
Frame must be less than or equal to 77,000