ultrasound flash cards

Advantages of ultrasound

-no radiation

-real time moving pictures

-very fine resolution

-Distinguish tissues of similar density

-View from many angles

-Patient positioning less important

Sound waves can be reflected which results in ____

Echo (bounce)

Sound waves can be absorbed which results in ____

No echo

Sound waves can pass through which results in

No echo

Common uses of ultrasound

-examine organs in detail

-find free fluid in abdomen, thorax

what does the reciever measure

-time it took to echo back

-strength (volume) of returning echo

-draws map of boundaries

White = ____ echoes

lots of echoes

black = ____ echoes

no echoes

Echogenicity

Anechoic

hyperechoic

hypoechoic

isoechoic

attenuation

Echogenicity, echogenic

making echos

1. how much a given tissue causes sound waves to echo off of it

2. term describing the appearance of tissues on ultrasound imaging

-strongly or weakly

Anoechoic

not producing echoes

sound goes through without reflecting