Ch 13: Real-Time Imaging Flashcards
This is a process of scanning one frame at a time.
static scanning
This is the most important operational parameter associated with an u/s movie.
frame rate
This is the system’s ablity to create numerous frames each second.
frame rate
What two factors determine frame rate?
- sound’s speed in the medium
2. the depth of imaging
Frame rate is measured in units of…
hertz (Hz).
This describes the ability to precisely position moving structures from instant to instant.
temporal resolution
Temporal resolution is determined by…
frame rate.
___ is determined by frame rate.
Temporal resolution
What is the relationship between frame rate and the time required to make a single image?
They are inversely related and reciprocals.
T x frame rate =
1
When an u/s system creates an image in 1/10 of a second, the frame rate is…
10 Hz.
When a system creates an image in 1/50 of a second, the frame rate is…
50 Hz.
What two sonographer-controlled settings of a system determine frame rate?
- imaging depth
2. # of pulses in each picture
How does imaging depth affect temporal resolution?
They are directly related.
Shallow imaging involves ___ go-return time, ___ T, ___ frame rate, and ___ temporal resolution.
short, shorter, higher, superior
