Quiz 10

Question 1

Ultrasound

Answer 1

• refers to sound waves with a frequency too high for humans to hear

Question 2

Types of Ultrasound

Answer 2

1. Doppler Ultrasound
   - doppler ultrasonography
   - color doppler
   - spectral doppler
2. A-mode
3. B-mode, or Real Time Imaging (2D real time image)

Question 3

Advantages of Ultrasound

Answer 3

1. inc reproductive efficiency
2. decreases non-productive days
3. portable
4. non-invasive
5. real time which allows for an evaluation of movement (blood flow) instead of a snap shot (x-ray)

Question 4

Disadvantages of Ultrasound

Answer 4

• highly dependent on the skill of the technician to interpret what is being seen
• can lead to negative/false positives

Question 5

How to determine the length of Gestation

Answer 5

• measuring the crown-rump length of fetus

Question 6

Pregnancy Detection via ultrasound for species

Answer 6

1. Cow- 25-30 d
2. Ewe- 17-18 d
3. Sow- 17-24 d

Question 7

Doppler

Answer 7

• used to detect blood flow of arteries and veins in abdomen

Question 8

Color Doppler

Answer 8

• uses an array of colors to detect direction and speed of blood flow through a blood vessel

Question 9

Spectral Doppler

Answer 9

• displays blood flow graphically in terms of distance traveled

Question 10

A-mode Ultrasound

Answer 10

• indicates a fluid filled structure

- can lead to false positives if pointed at a full bladder

Question 11

B-mode or real time ultrasound

Answer 11

• uses 2D real time imaging

- scanning tissue cross sections at different angles and reconstructing the data into a 3D image