Ch. 7 Range Equation Flashcards
1
Q
Go- return time or time-of-flight
A
The elapsed time from pulse creation to pulse reception.
Basis for measuring distances in diagnostic imaging.
2
Q
The time- of-flight is directly related to ___.
A
How deep a sound pulse travels.
3
Q
Greater distances ____ the time-of-flight; the lesser distances ____ the time-of-flight.
A
Prolong, shorten.
4
Q
The 13- microsecond rule always applies when?
A
Sound travels through soft tissue.
5
Q
For every ____ of go-return time, the object creating the reflection is ___ deeper in the body.
A
13 us, 1 cm.
6
Q
Speed of sound in soft tissue
A
1540 m/s or 154,000 cm/s
7
Q
When the depth of view is shallow than PRF is ____.
A
High
8
Q
When depth of view is deep, the PRF is ____.
A
Low
