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Flashcards in Nomenclatures and artifacts Deck (22)
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1

Images with MORE reflected echoes (brighter) than surrounding tissue

Echogenic / Hyperechoic

2

Images with FEWER reflected echoes (darker) than surrounding tissue

Hypoechoic

3

Images showing a level of reflected echoes similar to that of surrounding tissue

Isoechoic

4

Ultrasound Nomenclatures

Anechoic
Echogenic
Hypoechoic
Isoechoic

5

The arrangement of reflected echoes as "dots" on the image is referred to

Texture

6

Organ parenchyma is uniform in echogenicity

Homogeneous

7

Organ parenchyma is NOT uniform in echogenicity

Inhomogeneous / Heterogeneous

8

Structurein an image which does not directly correlate with actual tissue being scanned

Ultrasound Artifacts

9

Ultrasound artifacts

Reverberation
Acoustic Shadowing
Acoustic Enhancement
Edge Shadowing
Side lobe artifact
Mirror Image artifact

10

Production of spurious (false) echoes due to repeated reflections bet two interfaces w/ high impedance mismatch

Reverberation Artifact

11

A form of reverberation artifact that appear as a dense tapering V-shaped trail of echoes

Comet Tail Artifacts

12

Reverberation echoes similar to comet tail artifacts except that echoes diaplayed in longer stream

Ring -down artifacts

13

To eliminate reverberation

Increase in gel used
Use stand off pad
Reduce the gain
Move position of transducers

14

images showing NO internal echoes, black on the images

Anechoic / Sonolucent

15

Area appears as an area of low amplitude echoes behind an area of strongly attenuating tissue

Acoustic Shadowing

16

Some interference causing such effects are :

Soft Tissue/ gas
Soft tissue / bone , calcium
Normal tissue /fibrous tissue

17

Calcium and bone are usually

Echo free

18

Gas are often filled with

Reverberations

19

Appears as a localized atea of increased echo amplitude behind an area of low attenuation

Acoustic Enhancement

20

Combination of refraction and reflection occuring at the edge of rounded structures

Edge shadowing

21

Artifact caused by low energy "side lobe" of the main ultrasound beam

Side lobe artifact

22

Result in a mirror image of a structured occurring in an ultrasound display

Mirror Image Artifact