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Flashcards in Dynamic Range TEST Deck (14):
0

What is dynamic range?

*RATIO*of the largest to the smallest signal strength

dB relative measurement

aka: Number of choices - gray shades - gray mapping

1

What is threshold?

weak signals

2

what is saturate signals?

strong signals

3

the signal ______ the more it is processed

decreases

4

Compare the components to the dynamic range

understand the farther from the transducer the lower the dynamic range
FINISH SLIDE 6

COMPONENTS Dynamic range

transducer 120dB
receiver TCG 100-120dB
scan converter finish slide 6

5

What is the compression of dynamic range?

reduces the dynamic range

compressed to see data

sonographer adjusts compression

6

A receiver has a dynamic range of 110dB. the signal under goes 40dB of compression what is the dynamic range?

70dB

just subtract

7

What happens if an image has a low or narrow dynamic range?

few choices

fewer shades

high contrast image

bistable - black and white

8

When would you want a low dynamic range in imaging?

bladder

GB

vessels

9

What do you get with high dynamic range?

many choices

more shades

low contrast image

gray scale image

WIDE dynamic range

10

For general tissue imaging what kind of dynamic range do you want?

high

11

What are other names for dynamic range?

log compression

compression

range

12

Dynamic range is based on ....

echo strength

13

Dynamic range controls what kind of resolution?

contrast resolution

based on shades of gray