Lesson 1 (Part 2) Flashcards Preview

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Flashcards in Lesson 1 (Part 2) Deck (16)
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1

Echoic

Containing echos
- brightness

2

Anechoic

Without internal echoes
- black

3

Hyperechoic

Brighter echos than the surrounding echos

4

Hypoechoic

Darker echos than the surrounding echos

5

Isoechoic

Similar echos to the surrounding echos

6

Homogeneous

Smooth
- this is how we should look

7

Heterogeneous

Not smooth
- irregular

8

What is another word for doppler? Why?

1. Duplex
2. Because they are on top of each other

9

Doppler U/S

Uses the change in frequency to detect the speed of an object

10

What happens with the sound of a moving fire truck that gets closer to you?

The sound waves are compressed and closer together which means it get louder

11

Where is vessel blood flow the greatest?

In veins
- the smaller the diameter the faster the flow will be

12

What is speed of flow measured in?

cm/s

13

What is medical imaging with ultrasound called?

Sonography

14

How are 2D scans presented? (2)

1. Linear
- rectangle
2. Sector
- pie

15

What is a sector scan composed of?

Many scan lines with a common origin

16

What is the source of the doppler effect?

Blood flow