term1 Definition1term2 Definition2term3 Definition3
Please sign in to your Google account to access your documents:
To obtain a higher frame rate we must:
1) have a shallow image
2) single focus
3) narrow sector
4) low line density
Lower frame rates are a result of:
1) deeper imaging
2) multiple focal points
3) wide sector
4) high line density
What is contrast resolution?
Ability to distinguish structures based on variations of brightness (restricted by bits per pixel )
What is temporal resolution?
Ability to distinguish dynamics/changes over time (limited by frame rate)
What factors effect temporal resolution?
1) imaging depth
2) imaging frame or sector size
3) how many foci are being used
4) line density and packet size
What is line density?
The number of scan lines in an ultrasound image ( a higher level provides better resolution but worse frame rate)
What 3 things determine frame rate?
1) sound speed through a medium
2) depth of imaging
3) number of lines of sight
A scanning type that depicts the amplitude of returning echoes as a function of time along a single scan is called:
A-mode (amplitude)
A scanning type that is a presentation of changing reflector position versus time is called:
M-mode (motion)
A scanning mode where amplitude is mapped to a grey-scale level or brightness is called:
B-mode (brightness)
Need help typing ? See our FAQ (opens in new window)
Please sign in to create this set. We'll bring you back here when you are done.
Discard Changes Sign in
Please sign in to add to folders.
Sign in
Don't have an account? Sign Up »
You have created 2 folders. Please upgrade to Cram Premium to create hundreds of folders!