Ch. 1 Flashcards

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1
Q

Diagnostic ultrasound transducers generate a ________ of sound into the body.

a. wave
b. pulse
c. frequency
d. Doppler

A

b. pulse

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2
Q

The brightness of the dot corresponds to the ________ of the returning echo.

a. location
b. speed
c. strength
d. angle

A

c. strength

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3
Q

A rectangular image display is seen when using a ______ transducer.

a. sector
b. vector
c. convex
d. linear

A

d. linear

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4
Q

The location of each dot corresponds to the _______ of the echo to return.

a. strength
b. time
c. pulse
d. frequency

A

b. time

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5
Q

The method by which each pulse originates from the same starting point is called a ______ image.

a. sector
b. linear
c. convex
d. none of the above

A

a. sector

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6
Q

Sonographic images are composed of many _______.

a. crystals
b. scan lines
c. focal points
d. frequency shifts

A

b. scan lines

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7
Q

Echoes produced by _______ objects have different ______ than the pulses sent into the body.

a. stationary; frequencies
b. stable; directions
c. moving; frequencies
d. moving; echoes

A

c. moving; frequencies

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8
Q

Doppler ultrasound measures the movement of _________.

a. tissue
b. blood
c. A and B
d. none of the above

A

c. A and B

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9
Q

Quantitative data are determined by which Doppler display?

a. color imaging
b. power imaging
c. B-mode (gray-scale, or brightness) imaging
d. Spectral imaging

A

d. spectral imaging

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10
Q

The Doppler effect is a change in echo _______.

a. frequency
b. strength
c. amplitude
d. direction

A

a. frequency

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11
Q

Vertical parallel scan lines are seen with which transducer format?

a. vector
b. convex
c. linear
d. curvilinear

A

c. linear

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12
Q

A gray-scale ultrasound image is the visible counterpart of a/an ________.

a. frequency shift
b. spectral display
c. invisible object
d. electronic wave

A

c. invisible object

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13
Q

A ______ scan is shaped like a slice of pie.

a. sector
b. convex
c. linear
d. curvilinear

A

a. sector

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14
Q

Sonography is medical anatomic imaging using a _____ technique.

a. starting point
b. pulse echo
c. vertical parallel
d. transducer instrument

A

b. pulse echo

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15
Q

Three-dimensional imaging requires many adjacent tissue _____ to build the image.

a. moving objects
b. frequency shifts
c. cross-sections
d. ultrasound pulses

A

c. cross-sections

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