Ultrasound Scanning Definitions Unit 1

Question 1

Acoustic attenuation

Answer 1

absorption of sound

Question 2

acoustic enhancement/increased through- transmission

Answer 2

sound that travels through an anechoic substance and is not attenuated. increase brightness directly beyond the posterior border of the anechoic structures as compared with the surrounding area

Question 3

anechoic/sonolucent

Answer 3

without sound/echoes

Question 4

calipers

Answer 4

use to measure such quantities as time, frequency or velocity

Question 5

coupling

Answer 5

by using the gel, the coupling agent is a medium used to enhance transmission of sound from the transducer into the body

Question 6

complex

Answer 6

describes a mass which contains both echogenic and anechoic areas within it

Question 7

cycstic

Answer 7

a cyst has smooth well defined borders, anechoic increased through transmission

Question 8

solid

Answer 8

irregular borders internal echoes decreased through-transmission

Question 9

echogenic/hyperechoic

Answer 9

reflects sound with a brighter intensity

Question 10

homogeneous

Answer 10

texture is smooth and looks the same

Question 11

heterogeneous

Answer 11

doesn’t look the same

Question 12

hypoechoic

Answer 12

low level echoes within a structure

Question 13

fluid fluid-level

Answer 13

interference between two fluids with different acoustics characteristics

Question 14

interface

Answer 14

a boundry between two structures caused by the acoustic impedance differences between too structure

Question 15

isoechoic

Answer 15

very close to the normal parenchyma echogenicity pattern

Question 16

infiltrating

Answer 16

refers to a diffuse disease process or metastic disease

Question 17

irregular borders

Answer 17

borders are not well defined, i’ll defined or are not present

Question 18

loculated mass

Answer 18

well fined borders with internal echoes

Question 19

shadowing

Answer 19

the sound beam is attenuated by a solid or calcified object

Question 20

noise

Answer 20

represented by echoes that appear to arise from an organ that should not contain echoes

Question 21

gain

Answer 21

measure of strength of the ultrasound signal

Question 22

near gain

Answer 22

amplification of echo signals arising from structures close to the transducer

Question 23

Time Gain Compensation

Answer 23

also referred to as DGC, ability to compensate for attenuation of the transmitter beam as sound waves travels through the tissues in the body

Question 24

sector

Answer 24

an area having the shape of a fan or a piece of the pie

Question 25

texture

Answer 25

the appearance of the echo pattern within an image