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Physics > Chapter 16 > Flashcards

Chapter 16 Flashcards

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1
Q

A method of reporting the extent to which a signal can vary and still be accurately measured.
• “number of available choices”

A

Dynamic range

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2
Q

Units for dynamic range

A

Decibels

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3
Q

Weak signals are _ the systems threshold

A

Below

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4
Q

Signals that at too strong _ the system

A

Saturate

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5
Q

_ keeps the signals in a range of accurate measurement.

A

Dynamic range

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6
Q

Individual components of of a system have different

A

Different ranges

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6
Q

Individual components of of a system have different

A

Different ranges

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7
Q

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

A

Decreased

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8
Q

Components _(such as _) process data with the widest dynamic range.

A

earliest in the imaging chain (transducer)

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9
Q

Components _ (_) process data with narrower dynamic ranges

A

Farther along (display)

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9
Q

Components _ (_) process data with narrower dynamic ranges

A

Farther along (display)

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10
Q

Component: tranducer

Dynamic range:

A

120dB

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11
Q

Component: transducer

Dynamic range:

A

120dB

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11
Q

Component: tranducer

Dynamic range:

A

120dB

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12
Q

Component: receiver

Dynamic range:

A

100-120dB

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12
Q

Component: receiver

Dynamic range:

A

100-120dB

13
Q

Component: scan converter

Dynamic range:

A

40-50 dB

14
Q

Component: scan converter

Dynamic range:

A

40-50 dB

15
Q

Component: display

Dynamic range:

A

20-30dB

16
Q

Component: display

Dynamic range:

A

20-30dB

17
Q

Component: archive

Dynamic range:

A

10-30db

18
Q

_ eliminates potential errors that occur when the dynamic range of one component is narrower than that of another component

A

Compression of dynamic range

18
Q

_ eliminates potential errors that occur when the dynamic range of one component is narrower than that of another component

A

Compression of dynamic range

19
Q

Compression eliminates _ that occur when the dynamic ranges of _.

A

Potential errors

one component is narrower than that of another component

20
Q

Compression of dynamic range reduces _

A

the dynamic range of a signal without introducing errors

21
Q

Compression of dynamic range helps to _ info into _ so we can see _

A

Compress
The correct shades of gray
The meaningful clinical info

22
Q 
Compression of Dynamic Range: 
Largest signal _ 
Smallest signal _
Ranges of signals _
Adjustable by _
A

Remains the largest
Remains the smallest
Is reduced
Sonographer

22
Q 
Compression of Dynamic Range: 
Largest signal _ 
Smallest signal _
Ranges of signals _
Adjustable by _
A

Remains the largest
Remains the smallest
Is reduced
Sonographer

23
Q

Mathematics for compression uses _

A

dB

24
Q

Wide dynamic range = _ shades of gray

_ contrast

A

Many

Low

24
Q

Wide dynamic range = _ shades of gray

_ contrast

A

Many

Low

25
Q

Gray scale image= _ dynamic range

A

Widest

26
Q

Narrow dynamic range= _ gray shades

_ contrast

A

Fewer

High

27
Q

Bistable = _ dynamic range

A

Narrowest

28
Q 
Fewer shades: 
_ choices
Bistable or gray scale?
_ dynamic range 
_ contrast
A

Few
Bistable
Narrow
High

28
Q 
Fewer shades: 
_ choices
Bistable or gray scale?
_ dynamic range 
_ contrast
A

Few
Bistable
Narrow
High

29
Q 
More shades:
_ choices
Bistable or gray scale?
_ dynamic range
_ contrast
A

Many
Gray scale
Wide
Low

Physics (25 decks)

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