ultrasound

Question 1

frequency range of ultrasound

Answer 1

1-20 MHz

Question 2

ultrasound waves reflect off of

Answer 2

tissue interfaces

Question 3

Ultrasound transducer is both

Answer 3

sender and receiver

Question 4

distances calculated by

Answer 4

time the sound takes to travel

Question 5

speed of sound slowest to fastest (air bone muscle water)

Answer 5

air water muscle bone

Question 6

the denser the —– the image

Answer 6

brighter

Question 7

prons of ultrasound

Answer 7

safety
portable
cheep
immediate results

Question 8

cons of ultrasound

Answer 8

only can pass through soft tissue
noisy

Question 9

Piezoelectric crystals and ceramic

Answer 9

materials used to create sound waves in ultrasound

they do this by changing size and shape when voltage is applied

Question 10

transverse waves

Answer 10

emitted from electromagnetic radiation ( x-ray and CT)

Question 11

longitudinal waves

Answer 11

emitted from ultrasound
they cause the tissues in the body to experience compressional pressure and expansion pressure

Question 12

two causes of shadows in ultrasounds

Answer 12

dense structures
airbubles

Question 13

3 factors to increase SNR in ultrasound

Answer 13

higher intensity
higher frequency
narrowing the beam

Question 14

doppler shift

Answer 14

can measure moving substances such as blood higher frequency as it moves towards and lower as it moves away