US terms

Question 1

what frequency does ultrasound emit

Answer 1

1-20MHz sound waves emitted

Question 2

how does the current form the ultrasound work

Answer 2

piezoelectric crystals inside a transducer rapidly vibrate in response to an alternating electric current.

Question 3

resolution:

Answer 3

ability to clearly distinguish 2 structures lying beside one another

Question 4

focus-

Answer 4

should be placed at level of object being assessed

Question 5

gain

Answer 5

intense or decrease the signal intensity

Question 6

lower frequency is used for what depth of structures

Answer 6

deeper structures- poorer quality have better tissue penetration

Question 7

high frequency is used for what depth of structures

Answer 7

more superficial nerves- clear image but offer poor tissue penetration

Question 8

gain settings

Answer 8

screen brightness can be adjusted manually

Question 9

excessive or inadequate fain can cause

Answer 9

blurring of tissue boundaries and a loss of information