Chapter 16

Question 1

____ ____ is a method of describing the extent to which a signal can vary and still be processed accurately.

Answer 1

Dynamic range

Question 2

The individual ____ of an ultrasound system have different dynamic ranges

Answer 2

Components

Question 3

As a general rule, the dynamic range of information ____ the more it is processed.

Answer 3

Decreases

Question 4

What are the dynamic ranges of each component of the ultrasound system?

Answer 4

Transducer - 120 dB
Receiver - 100 to 120 dB
Scan Converter - 40 to 50 dB
Display - 20 to 30 dB
Archive - 10 to 30 dB

Question 5

____ reduces the dynamic range of a signal without introducing errors.

Answer 5

Compression

Question 6

Can compression be adjusted by the sonographer?

Answer 6

Yes

Question 7

To find dynamic range of compressed signal, subtract amount of compression from the uncompressed signal.

Answer 7

Subtract

Question 8

To find dynamic range of uncompressed signal, ____ the dynamic range of the compressed signal to the amount the signal was compressed by.

Answer 8

Add

Question 9

What is the alternate of dynamic range?

Answer 9

“Number of choices”

Question 10

A ____ dynamic range has fewer shades of grey and is high contrast

Answer 10

Narrow

Question 11

A ____ dynamic range has many shades of grey and is low contrast

Answer 11

Wide