Chapter 17 Flashcards
1
Q
Sound with a frequency of 4 MHz is created by a transducer. What is the fundamental frequency?
A
4 MHz
2
Q
Sound with a frequency of 4 MHz is created by a transducer. What is the harmonic frequency?
A
8 MHz
3
Q
Which of the following creates harmonics?
A
Nonlinear behavior
4
Q
Where are harmonics created?
A
In the tissues
5
Q
What nonlinear behavior creates tissue harmonics?
A
Sound travels faster in compressions and slower in rarefactions
6
Q
What nonlinear behavior creates contrast harmonics?
A
Microbubbles expand to a greater extent than they compress
7
Q
Which of the following is associated with the highest mechanical index?
A
Low frequency, extreme peak rarefactional pressure
