Questions from the back of the book Flashcards

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1
Q

Coded excitation, eliminates

A

Range ambiguity

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2
Q

First thing you should do when seeing a patient is

A

Check the wristband

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3
Q

Spatial compounding is the creation of an image from different

A

Angles

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4
Q

Penetration is an advantage of _______excitation

A

Coded

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5
Q

Strongest reflectors are in

A

Air
weakest reflectors are in soft tissue

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6
Q

What artifact is created by an object located deeper than the image?

A

Range ambiguity

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7
Q

Lowering PRF reduces range

A

Ambiguity

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8
Q

Coded excitation improves what resolution?

A

Contrast resolution improves with coded excitation.

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9
Q

The consolidation of many images into a single frame best describes

A

Persistence

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10
Q

What describes the empirical approach to the study of bio facts?

A

Exposure response

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11
Q

What best describes the mechanicstic approach to the study bio facts?

A

Cause and effect 

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12
Q

Mechanical index is associated with what

A

Cavitation

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13
Q

What is the name of the receiver function that corrects for attenuation?

A

Compensation

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14
Q

What is the elimination of voltages that do not exceed a certain level?

A

Reject

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15
Q

What is the first adjustment made win an entire images to dark

A

gain needs to be adjusted

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16
Q

The more pixels per inch means the better the ______ resolution

A

The more pixels per inch means the better spatial resolution

17
Q

The more bits per pixel’s means more shade of

A

Gray

18
Q

At the focus, the Beam diameter is______ the transducer diameter

A

Half

19
Q

If we increase the transducer diameter, the beam diameter in the far zone is going to increase or decrease

A

If we increase the transducer diameter, the beam diameter in the far zone is going to decrease

20
Q

If the transducer aperture increases, the lateral resolution at its smallest dimension is going to increase or decrease?

A

Increase

21
Q

If the frequency is decreased, the numerical value of the radio resolution is

A

Increased

22
Q

What are the units of longitudinal resolution?

A

Ft

23
Q

With the presence of ________ we see more boundaries, then there are reflecting surfaces

A

Reverberations

24
Q

The Doppler shift always occur if the source and observer are in motion relative to each other in the angle between them is not 90°

A

True