Questions 8

Question 1

Given a BNR of 6:1, what is the highest intensity in the ultrasound field if the machine is set with the parameters 1 W/CM2, 3 MHz?

Answer 1

6 W/cm2

Question 2

Which frequency penetrates the deepest?

Answer 2

1 MHz

Question 3

Ultrasound energy is absorbed more quickly by which?

Answer 3

Collagen tissue (tendon, ligament, joint capsule)

Question 4

The fact that the US beam is collated means what?

Answer 4

The beam is projected from the sound head in the shape of a cylinder

Question 5

The primary purpose of the gel coupling agent used in the application of the US is?

Answer 5

provide a medium for the sound waves to travel

Question 6

BNR refers to?

Answer 6

Ratio of the max spatial peak intensity on the sound head to the average intensity across the surface of the sound head

Question 7

When temp increase is required to achieve the vigorous heating needed for tissue elongation?

Answer 7

Greater than 4 deg C

Question 8

T/F

The time window for stretching after ultrasound is up to 15 mins?

Answer 8

F

Question 9

What are the measurement units for frequency?

Answer 9

MHz

Question 10

What are the measurement units for spatial average intensity?

Answer 10

Watts per square centimeter (W/cm2)